Spec No.: JELF243A_9133D-01
P1/13
CHIP COILS (CHIP INDUCTORS) LQW18AN□□□□8Z□
Murata Standard Reference Specification [AEC-Q200]
1. Scope
This reference specification applies to chip coils (chip inductors) LQW18AN_8Z series for automotive electronics based on
AEC-Q200 except for power trains and safeties.
2. Part Numbering
(Ex.)
LQ
W
18
A
N
2N2
C
8
Z
D
Product Structure Dimension
ID
(L × W)
Application Category Inductance Tolerance Performance
Category
Packaging
and
Z: Automotive D: taping
characteristic
*B: bulk
*B: Bulk packing is also available (taping condition: however, products without reels are put in plastic bags).
3. Part Number and Rating
Operating temperature range
-55°C to +125°C
Storage temperature range
-55°C to +125°C
Inductance
Customer
Part number
Tolerance
Q
(Min.)
DC
resistance
(Ω max.)
Self-resonant
frequency
(MHz min.)
Rated
current
(mA)*1
ESD
Rank
6: 25 kV
2.2
C: ±0.2 nH
24
0.018
15000
3200
6
2.4
C: ±0.2 nH
18
0.026
15000
2400
6
LQW18AN3N0C8ZD
3.0
C: ±0.2 nH
13
0.17
15000
670
6
LQW18AN3N9B8ZD
3.9
B: ±0.1 nH
30
0.028
10000
2200
6
LQW18AN3N9C8ZD
3.9
C: ±0.2 nH
30
0.028
10000
2200
6
LQW18AN3N9G8ZD
3.9
G: ±2%
30
0.028
10000
2200
6
LQW18AN4N1B8ZD
4.1
B: ±0.1 nH
30
0.028
10000
2200
6
LQW18AN4N1C8ZD
4.1
C: ±0.2 nH
30
0.028
10000
2200
6
LQW18AN4N1G8ZD
4.1
G: ±2%
30
0.028
10000
2200
6
Murata
Part number
Nominal
value
(nH)
LQW18AN2N2C8ZD
LQW18AN2N4C8ZD
LQW18AN4N2B8ZD
4.2
B: ±0.1 nH
30
0.028
10000
2200
6
LQW18AN4N2C8ZD
4.2
C: ±0.2 nH
30
0.028
10000
2200
6
LQW18AN4N2G8ZD
4.2
G: ±2%
30
0.028
10000
2200
6
LQW18AN4N3B8ZD
4.3
B: ±0.1 nH
35
0.036
11600
2100
6
LQW18AN4N3C8ZD
4.3
C: ±0.2 nH
35
0.036
11600
2100
6
LQW18AN4N3G8ZD
4.3
G: ±2%
35
0.036
11600
2100
6
LQW18AN4N7B8ZD
4.7
B: ±0.1 nH
25
0.054
10400
1500
6
LQW18AN4N7C8ZD
4.7
C: ±0.2 nH
25
0.054
10400
1500
6
LQW18AN4N7G8ZD
4.7
G: ±2%
25
0.054
10400
1500
6
LQW18AN4N9B8ZD
4.9
B: ±0.1 nH
23
0.081
7300
1200
6
LQW18AN4N9C8ZD
4.9
C: ±0.2 nH
23
0.081
7300
1200
6
LQW18AN4N9G8ZD
4.9
G: ±2%
23
0.081
7300
1200
6
LQW18AN5N6C8ZD
5.6
C: ±0.2 nH
38
0.040
6650
1900
6
LQW18AN5N6G8ZD
5.6
G: ±2%
38
0.040
6650
1900
6
LQW18AN6N0C8ZD
6
C: ±0.2 nH
40
0.040
6650
1900
6
LQW18AN6N0G8ZD
6
G: ±2%
40
0.040
6650
1900
6
LQW18AN6N5C8ZD
6.5
C: ±0.2 nH
40
0.040
6650
1900
6
LQW18AN6N5G8ZD
6.5
G: ±2%
40
0.040
6650
1900
6
LQW18AN6N8C8ZD
6.8
C: ±0.2 nH
40
0.040
6650
1900
6
LQW18AN6N8G8ZD
6.8
G: ±2%
40
0.040
6650
1900
6
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P2/13
Inductance
Customer
Part number
Tolerance
Q
(Min.)
DC
resistance
(Ω max.)
Self-resonant
frequency
(MHz min.)
Rated
current
(mA)*1
ESD
Rank
6: 25 kV
7.2
C: ±0.2 nH
38
0.040
6650
1900
6
7.2
G: ±2%
38
0.040
6650
1900
6
LQW18AN7N5C8ZD
7.5
C: ±0.2 nH
35
0.048
7000
1500
6
LQW18AN7N5G8ZD
7.5
G: ±2%
35
0.048
7000
1500
6
LQW18AN8N2C8ZD
8.2
C: ±0.2 nH
38
0.052
4750
1600
6
LQW18AN8N2G8ZD
8.2
G: ±2%
38
0.052
4750
1600
6
LQW18AN8N4C8ZD
8.4
C: ±0.2 nH
38
0.052
4750
1600
6
LQW18AN8N4G8ZD
8.4
G: ±2%
38
0.052
4750
1600
6
LQW18AN8N7C8ZD
8.7
C: ±0.2 nH
38
0.052
4750
1600
6
LQW18AN8N7G8ZD
8.7
G: ±2%
38
0.052
4750
1600
6
LQW18AN9N1C8ZD
9.1
C: ±0.2 nH
38
0.052
4750
1600
6
LQW18AN9N1G8ZD
9.1
G: ±2%
38
0.052
4750
1600
6
LQW18AN9N5C8ZD
9.5
C: ±0.2 nH
38
0.052
4750
1600
6
LQW18AN9N5G8ZD
9.5
G: ±2%
38
0.052
4750
1600
6
Murata
Part number
Nominal
value
(nH)
LQW18AN7N2C8ZD
LQW18AN7N2G8ZD
LQW18AN9N9C8ZD
9.9
C: ±0.2 nH
38
0.052
4750
1600
6
LQW18AN9N9G8ZD
9.9
G: ±2%
38
0.052
4750
1600
6
LQW18AN10NG8ZD
10
G: ±2%
38
0.052
4750
1600
6
LQW18AN10NJ8ZD
10
J: ±5%
38
0.052
4750
1600
6
LQW18AN11NG8ZD
11
G: ±2%
40
0.052
4750
1600
6
LQW18AN11NJ8ZD
11
J: ±5%
40
0.052
4750
1600
6
LQW18AN12NG8ZD
12
G: ±2%
37
0.064
5000
1500
6
LQW18AN12NJ8ZD
12
J: ±5%
37
0.064
5000
1500
6
LQW18AN13NG8ZD
13
G: ±2%
37
0.064
5000
1500
6
LQW18AN13NJ8ZD
13
J: ±5%
37
0.064
5000
1500
6
LQW18AN15NG8ZD
15
G: ±2%
38
0.075
4600
1400
6
LQW18AN15NJ8ZD
15
J: ±5%
38
0.075
4600
1400
6
LQW18AN16NG8ZD
16
G: ±2%
40
0.075
4600
1400
6
LQW18AN16NJ8ZD
16
J: ±5%
40
0.075
4600
1400
6
LQW18AN17NG8ZD
17
G: ±2%
40
0.075
4600
1400
6
LQW18AN17NJ8ZD
17
J: ±5%
40
0.075
4600
1400
6
LQW18AN18NG8ZD
18
G: ±2%
40
0.075
4600
1400
6
LQW18AN18NJ8ZD
18
J: ±5%
40
0.075
4600
1400
6
LQW18AN19NG8ZD
19
G: ±2%
40
0.075
4600
1400
6
LQW18AN19NJ8ZD
19
J: ±5%
40
0.075
4600
1400
6
LQW18AN22NG8ZD
22
G: ±2%
40
0.086
3450
1300
6
LQW18AN22NJ8ZD
22
J: ±5%
40
0.086
3450
1300
6
LQW18AN23NG8ZD
23
G: ±2%
40
0.086
3450
1300
6
LQW18AN23NJ8ZD
23
J: ±5%
40
0.086
3450
1300
6
LQW18AN24NG8ZD
24
G: ±2%
40
0.086
3450
1300
6
LQW18AN24NJ8ZD
24
J: ±5%
40
0.086
3450
1300
6
LQW18AN25NG8ZD
25
G: ±2%
40
0.098
3600
1200
6
LQW18AN25NJ8ZD
25
J: ±5%
40
0.098
3600
1200
6
LQW18AN27NG8ZD
27
G: ±2%
40
0.098
3600
1200
6
LQW18AN27NJ8ZD
27
J: ±5%
40
0.098
3600
1200
6
LQW18AN28NG8ZD
28
G: ±2%
40
0.098
3600
1200
6
LQW18AN28NJ8ZD
28
J: ±5%
40
0.098
3600
1200
6
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P3/13
Inductance
Customer
Part number
Tolerance
Q
(Min.)
DC
resistance
(Ω max.)
Self-resonant
frequency
(MHz min.)
Rated
current
(mA)*1
ESD
Rank
6: 25 kV
30
G: ±2%
40
0.12
2880
1100
6
30
J: ±5%
40
0.12
2880
1100
6
LQW18AN31NG8ZD
31
G: ±2%
40
0.11
3150
1100
6
LQW18AN31NJ8ZD
31
J: ±5%
40
0.11
3150
1100
6
LQW18AN33NG8ZD
33
G: ±2%
40
0.11
3150
1100
6
LQW18AN33NJ8ZD
33
J: ±5%
40
0.11
3150
1100
6
LQW18AN34NG8ZD
34
G: ±2%
40
0.15
3000
1050
6
LQW18AN34NJ8ZD
34
J: ±5%
40
0.15
3000
1050
6
LQW18AN36NG8ZD
36
G: ±2%
37
0.20
3000
910
6
LQW18AN36NJ8ZD
36
J: ±5%
37
0.20
3000
910
6
LQW18AN37NG8ZD
37
G: ±2%
37
0.20
3000
910
6
LQW18AN37NJ8ZD
37
J: ±5%
37
0.20
3000
910
6
LQW18AN39NG8ZD
39
G: ±2%
40
0.16
3280
1000
6
LQW18AN39NJ8ZD
39
J: ±5%
40
0.16
3280
1000
6
LQW18AN41NG8ZD
41
G: ±2%
40
0.16
3280
1000
6
LQW18AN41NJ8ZD
41
J: ±5%
40
0.16
3280
1000
6
LQW18AN43NG8ZD
43
G: ±2%
40
0.21
2780
840
6
LQW18AN43NJ8ZD
43
J: ±5%
40
0.21
2780
840
6
LQW18AN44NG8ZD
44
G: ±2%
40
0.21
2780
840
6
LQW18AN44NJ8ZD
44
J: ±5%
40
0.21
2780
840
6
LQW18AN47NG8ZD
47
G: ±2%
32
0.23
2700
830
6
Murata
Part number
Nominal
value
(nH)
LQW18AN30NG8ZD
LQW18AN30NJ8ZD
LQW18AN47NJ8ZD
47
J: ±5%
32
0.23
2700
830
6
LQW18AN48NG8ZD
48
G: ±2%
32
0.23
2700
830
6
LQW18AN48NJ8ZD
48
J: ±5%
32
0.23
2700
830
6
LQW18AN51NG8ZD
51
G: ±2%
32
0.23
2700
830
6
LQW18AN51NJ8ZD
51
J: ±5%
32
0.23
2700
830
6
LQW18AN52NG8ZD
52
G: ±2%
35
0.27
2750
750
6
LQW18AN52NJ8ZD
52
J: ±5%
35
0.27
2750
750
6
LQW18AN56NG8ZD
56
G: ±2%
38
0.26
2600
770
6
LQW18AN56NJ8ZD
56
J: ±5%
38
0.26
2600
770
6
LQW18AN58NG8ZD
58
G: ±2%
35
0.30
2400
700
6
LQW18AN58NJ8ZD
58
J: ±5%
35
0.30
2400
700
6
LQW18AN68NG8ZD
68
G: ±2%
37
0.38
2380
630
6
LQW18AN68NJ8ZD
68
J: ±5%
37
0.38
2380
630
6
LQW18AN69NG8ZD
69
G: ±2%
37
0.38
2380
630
6
LQW18AN69NJ8ZD
69
J: ±5%
37
0.38
2380
630
6
LQW18AN72NG8ZD
72
G: ±2%
34
0.47
2330
560
6
LQW18AN72NJ8ZD
72
J: ±5%
34
0.47
2330
560
6
LQW18AN73NG8ZD
73
G: ±2%
28
0.41
2280
590
6
LQW18AN73NJ8ZD
73
J: ±5%
28
0.41
2280
590
6
LQW18AN75NG8ZD
75
G: ±2%
28
0.41
2280
590
6
LQW18AN75NJ8ZD
75
J: ±5%
28
0.41
2280
590
6
LQW18AN78NG8ZD
78
G: ±2%
28
0.41
2280
590
6
LQW18AN78NJ8ZD
78
J: ±5%
28
0.41
2280
590
6
LQW18AN82NG8ZD
82
G: ±2%
34
0.5
2230
550
6
LQW18AN82NJ8ZD
82
J: ±5%
34
0.5
2230
550
6
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P4/13
Inductance
Customer
Part number
Tolerance
Q
(Min.)
DC
resistance
(Ω max.)
Self-resonant
frequency
(MHz min.)
Rated
current
(mA)*1
ESD
Rank
6: 25 kV
83
G: ±2%
34
0.5
2230
550
6
83
J: ±5%
34
0.5
2230
550
6
LQW18AN91NG8ZD
91
G: ±2%
33
0.54
1900
520
6
LQW18AN91NJ8ZD
91
J: ±5%
33
0.54
1900
520
6
LQW18AN94NG8ZD
94
G: ±2%
34
0.63
1750
490
6
LQW18AN94NJ8ZD
94
J: ±5%
34
0.63
1750
490
6
LQW18ANR10G8ZD
100
G: ±2%
34
0.63
1750
490
6
LQW18ANR10J8ZD
100
J: ±5%
34
0.63
1750
490
6
LQW18ANR11G8ZD
110
G: ±2%
32
0.7
1730
450
6
LQW18ANR11J8ZD
110
J: ±5%
32
0.7
1730
450
6
LQW18ANR12G8ZD
120
G: ±2%
32
0.72
1650
450
6
LQW18ANR12J8ZD
120
J: ±5%
32
0.72
1650
450
6
LQW18ANR15G8ZD
150
G: ±2%
28
0.87
1580
420
6
LQW18ANR15J8ZD
150
J: ±5%
28
0.87
1580
420
6
LQW18ANR18G8ZD
180
G: ±2%
25
1.65
1380
310
6
LQW18ANR18J8ZD
180
J: ±5%
25
1.65
1380
310
6
LQW18ANR20G8ZD
200
G: ±2%
25
1.74
1350
290
6
LQW18ANR20J8ZD
200
J: ±5%
25
1.74
1350
290
6
LQW18ANR21G8ZD
210
G: ±2%
27
1.98
1330
280
6
LQW18ANR21J8ZD
210
J: ±5%
27
1.98
1330
280
6
LQW18ANR22G8ZD
220
G: ±2%
25
2.08
1330
280
6
Murata
Part number
Nominal
value
(nH)
LQW18AN83NG8ZD
LQW18AN83NJ8ZD
LQW18ANR22J8ZD
220
J: ±5%
25
2.08
1330
280
6
LQW18ANR25G8ZD
250
G: ±2%
24
2.28
1330
250
6
LQW18ANR25J8ZD
250
J: ±5%
24
2.28
1330
250
6
LQW18ANR27G8ZD
270
G: ±2%
24
2.42
1250
260
6
LQW18ANR27J8ZD
270
J: ±5%
24
2.42
1250
260
6
LQW18ANR30G8ZD
300
G: ±2%
25
3.12
1200
220
6
LQW18ANR30J8ZD
300
J: ±5%
25
3.12
1200
220
6
LQW18ANR33G8ZD
330
G: ±2%
25
3.84
1100
190
6
LQW18ANR33J8ZD
330
J: ±5%
25
3.84
1100
190
6
LQW18ANR36G8ZD
360
G: ±2%
25
3.98
1050
190
6
LQW18ANR36J8ZD
360
J: ±5%
25
3.98
1050
190
6
LQW18ANR39G8ZD
390
G: ±2%
25
4.23
1100
190
6
LQW18ANR39J8ZD
390
J: ±5%
25
4.23
1100
190
6
*1 As shown in the diagram below, derating is applied to the rated current based on the operating temperature.
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P5/13
4. Testing Conditions
Unless otherwise specified
Temperature: ordinary temperature (15°C to 35°C)
Humidity: ordinary humidity [25% to 85% (RH)]
In case of doubt
Temperature: 20°C±2°C
Humidity: 60% to 70% (RH)
Atmospheric pressure: 86 kPa to 106 kPa
5. Appearance and Dimensions
Unit mass (typical value): 0.0034 g
6. Marking
No marking.
7. Electrical Performance
No.
Item
7.1
Inductance
Specification
Meet chapter 3 ratings.
Test method
Measuring equipment: Keysight E4991A or the
equivalent
Measuring frequency:
Inductance
100 MHz
Q
250 MHz 2.2 nH to 44 nH
200 MHz 47 nH to 69 nH
150 MHz 72 nH to 150 nH
7.2
Q
Meet chapter 3 ratings.
100 MHz 180 nH to 390 nH
Measuring conditions:
Measurement signal level: Approx. 0 dBm
Measurement terminal distance: 1.0 mm
Electrical length: 10.0 mm
Measuring fixture: Keysight 16197A
Position the chip coil under test as shown in the
measuring example below and connect it to the
electrode by applying weight.
Measurement example:
Measuring method: see "Electrical performance:
Measuring method for inductance/Q" in the chapter
"13. Appendix".
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
No.
P6/13
Item
Specification
Test method
7.3
DC resistance
Meet chapter 3 ratings.
Measuring equipment: digital multimeter
7.4
Self-resonant
frequency
Meet chapter 3 ratings.
Measuring equipment: Keysight N5230A or the
equivalent
7.5
Rated current
Product temperature rise: 40°C max.
Apply the rated current specified in chapter 3.
8. AEC-Q200 Requirement
8.1 Performance [based on table 5 for magnetics (inductors/transformer) AEC-Q200 Rev. D issued June 1,
2010]
AEC-Q200
No.
3
Stress
High
temperature
exposure
Murata specification/deviation
Test method
1000 h at 125°C
Set for 24 h at room condition, then
measured.
Meet table A after testing.
Table A
Appearance
No damage
Inductance change rate (at 100 MHz)
1000 cycles
-40°C to +125°C
Set for 24 h at room condition, then
measured.
Within ±5%
4
Temperature
cycling
Meet table A after testing.
7
Biased humidity 1000 h at 85°C, 85% (RH). Unpowered.
Set for 24 h at room condition, then
measured.
Meet table A after testing.
8
Operational life
Apply rated current 125°C 1000 h
Set for 24 h at room condition, then
measured.
Meet table A after testing.
9
External visual
Visual inspection
No abnormalities
10
Physical
dimension
Meet chapter 5, "Appearance and
Dimensions".
No defects
12
Resistance to
solvents
Per MIL-STD-202
Method 215
Not applicable
13
Mechanical
shock
Per MIL-STD-202
Meet table A after testing.
Method 213
Condition C:
100 g’s (0.98 N), 6 ms, half sine, 12.3 ft/s
14
Vibration
5 g's (0.049 N) for 20 min, 12 cycles each Meet table A after testing.
of 3 orientations
Test from 10 Hz to 2000 Hz
15
Resistance to
soldering heat
No-heating
Solder temperature
260°C±5°C
Immersion time 10 s
Pre-heating: 150°C±10°C, 60 s to 90 s
Meet table A after testing.
17
ESD
Per AEC-Q200-002
ESD rank: Refer to chapter 3 ratings.
Meet table A after testing.
18
Solderbility
Per J-STD-002
Method b: not applicable
95% of the terminations is to be soldered (except exposed
wire).
19
Electrical
Measured: inductance
characterization
No defects
20
Flammability
Per UL-94
Not applicable
21
Board flex
Epoxy-PCB (1.6 mm)
Deflection 2 mm (min.)
Holding time 60 s
Meet table B after testing.
Table B
Appearance
DC resistance change rate
22
Terminal
Strength
Per AEC-Q200-006
A force of 17.7 N for 60 s
No damage
Within ±10%
Murata deviation request: 10 N for 5 s
No defect
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P7/13
9. Specification of Packaging
9.1 Appearance and dimensions of tape (8 mm width/paper tape)
A
1.15±0.05
B
1.9±0.05
t
1.1 max.
(in mm)
9.2 Taping specifications
Packing quantity
(Standard quantity)
4000 pcs/reel
Packing method
The products are placed in embossed cavities of a base tape and sealed by a top tape and a bottom
tape.
Feed hole position
The feed holes on the base tape are on the right side when the top tape is pulled toward the user.
Joint
The base tape and the top tape are seamless.
Number of missing
products
Number of missing products within 0.1% of the number per reel or 1 pc., whichever is greater, and are
not continuous. The specified quantity per reel is kept.
9.3 Break down force of tape
Break down force of top tape
5 N min.
Break down force of bottom tape
5 N min.
9.4 Peeling off force of top tape
Speed of peeling off
Peeling off force
165 to 180 degree
Bottom tape
300 mm/min
0.1 N to 0.6 N (The lower limit is for typical value.)
F
Top tape
Base tape
9.5 Dimensions of leader section, trailer section and reel
A vacant section is provided in the leader (start) section and trailer (end) section of the tape for the product. The leader
section is further provided with an area consisting only of the top tape. (See the diagram below.)
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P8/13
9.6 Marking for reel
Customer part number, Murata part number, inspection number (*1), RoHS marking (*2), quantity, etc.
*1 Expression of inspection No.: (1) Factory code
(2) Date
□□
○○○○
First digit: year/last digit of year
(1)
(2)
(3)
Second digit: month/Jan. to Sep.→1 to 9, Oct. to Dec.→O, N, D
Third, Fourth digit: day
(3) Serial No.
*2 Expression of RoHS marking: (1) RoHS regulation conformity
ROHSY
()
(2) Murata classification number
(1)
(2)
9.7 Marking on outer box (corrugated box)
Customer name, purchasing order number, customer part number, Murata part number, RoHS marking (*2), quantity, etc.
9.8 Specification of outer box
Label
H
D
W
10.
Dimensions of outer box
(mm)
W
D
H
186
186
93
Standard reel quantity
in outer box (reel)
5
* Above outer box size is typical. It depends on a
quantity of an order.
Caution
10.1 Restricted applications
Please contact us before using our products for the applications listed below which require especially high reliability for the
prevention of defects which might directly cause damage to the third party's life, body or property.
(1) Aircraft equipment
(6) Disaster/crime prevention equipment
(2) Aerospace equipment
(7) Traffic signal equipment
(3) Undersea equipment
(8) Transportation equipment (trains, ships, etc.)
(4) Power plant control equipment
(9) Data-processing equipment
(5) Medical equipment
(10) Applications of similar complexity and/or reliability requirements
to the applications listed in the above
10.2 Precautions on rating
Do not use the products in excess of their rated current. Doing so may cause the product to generate heat, resulting in short
circuit between wires, wire breakage, or melted solder, which may cause dropping of parts.
10.3 Fail-safe
Be sure to provide an appropriate fail-safe function on your product to prevent a second damage that may be caused by the
abnormal function or the failure of our product.
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P9/13
11. Precautions for Use
This product is for use only with reflow soldering. It is designed to be mounted by soldering. If you want to use other mounting
method, for example, using a conductive adhesive, please consult us beforehand.
11.1 Land dimensions
The following diagram shows the recommended land dimensions for reflow soldering.
The land dimensions are designed in consideration of electrical characteristics and mountability. Use of other land
dimensions may preclude achievement of performance. In some cases, it may result in poor solderability, including positional
shift. If you use other land pattern, consider it adequately.
a
0.86
b
2.00
c
1.15
(in mm)
11.2 Flux and solder used
Flux
• Use a rosin-based flux that includes an activator with a chlorine conversion value of 0.06(wt)% to 0.1(wt)%.
• Do not use a highly acidic flux with a halide content exceeding 0.2(wt)% (chlorine conversion value).
• Do not use a water-soluble flux.
Solder
• Use Sn-3.0Ag-0.5Cu solder.
• Standard thickness of solder paste: 100 μm to 150 μm
If you want to use a flux other than the above, please consult our technical department.
11.3 Soldering conditions (reflow)
• Pre-heating should be in such a way that the temperature difference between solder and product surface is limited to 150°C
max.
Cooling into solvent after soldering also should be in such a way that the temperature difference is limited to 100°C max.
Insufficient pre-heating may cause cracks on the product, resulting in the deterioration of product quality.
• Standard soldering profile and the limit soldering profile is as follows.
The excessive limit soldering conditions may cause leaching of the electrode and/or resulting in the deterioration of product
quality.
Temp.
(℃)
260℃
245℃±3℃
230℃
220℃
Limit Profile
180
150
Standard Profile
30s～60s
60s max.
90s±30s
Time. (s)
Standard profile
Limit profile
Pre-heating
150°C to 180°C/90 s±30 s
150°C to 180°C/90 s±30 s
Heating
Above 220°C/30 s to 60 s
Above 230°C/60 s max.
245°C±3°C
260°C/10 s
2 times
2 times
Peak temperature
Number of reflow cycles
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P10/13
11.4 Reworking with soldering iron
The following requirements must be met to rework a soldered product using a soldering iron.
Item
Requirement
Pre-heating
150°C/approx. 1 min
Tip temperature of soldering iron
350°C max.
Power consumption of soldering iron
80 W max.
Tip diameter of soldering iron
Soldering time
ø3 mm max.
3 s (+1 s, -0 s)
Number of reworking operations
2 times max.
* Avoid a direct contact of the tip of the soldering iron with the product. Such a
direction contact may cause cracks in the ceramic body due to thermal shock.
11.5 Solder volume
Solder shall be used not to increase the volume too much.
An increased solder volume increases mechanical stress on the product. Exceeding solder volume may cause the failure of
mechanical or electrical performance.
11.6 Product's location
The following shall be considered when designing and laying out PCBs.
(1) PCB shall be designed so that products are not subject to mechanical stress due to warping the board.
[Products direction]
Products shall be located in the sideways direction (length: a < b) to the mechanical stress.
a
b
〈 Poor example〉
〈 Good example〉
(2) Components location on PCB separation
It is effective to implement the following measures, to reduce stress in separating the board.
It is best to implement all of the following three measures; however, implement as many measures as possible to reduce
stress.
Contents of measures
Stress level
(1) Turn the mounting direction of the component parallel to the
board separation surface.
A > D*1
(2) Add slits in the board separation part.
A>B
(3) Keep the mounting position of the component away from the
board separation surface.
A>C
*1 A > D is valid when stress is added vertically to the perforation as with hand separation.
If a cutting disc is used, stress will be diagonal to the PCB, therefore A > D is invalid.
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P11/13
(3) Mounting components near screw holes
When a component is mounted near a screw hole, it may be affected by the board deflection that occurs during the
tightening of the screw.
Mount the component in a position as far away from the screw holes as possible.
11.7 Handling of substrate
After mounting products on a substrate, do not apply any stress to the product caused by bending or twisting to the substrate
when cropping the substrate, inserting and removing a connector from the substrate or tightening screw to the substrate.
Excessive mechanical stress may cause cracking in the product.
Bending
Twisting
11.8 Cleaning
The product shall be cleaned under the following conditions.
(1) The cleaning temperature shall be 60°C max. If isopropyl alcohol (IPA) is used, the cleaning temperature shall be 40°C
max.
(2) Perform ultrasonic cleaning under the following conditions. Exercise caution to prevent resonance phenomenon in
mounted products and the PCB.
Item
Requirement
Power
Time
20 W/L max.
5 min max.
Frequency
28 kHz to 40 kHz
(3) Cleaner
Alcohol-based cleaner: IPA
Aqueous agent: PINE ALPHA ST-100S
(4) There shall be no residual flux or residual cleaner. When using aqueous agent, rinse the product with deionized water
adequately and completely dry it so that no cleaner is left.
* For other cleaning, consult our technical department.
11.9 Storage and transportation
Storage period
Use the product within 12 months after delivery.
If you do not use the product for more than 12 months, check solderability before using it.
Storage conditions
• The products shall be stored in a room not subject to rapid changes in temperature and humidity.
The recommended temperature range is -10°C to +40°C. The recommended relative humidity
range is 15% to 85%.
Keeping the product in corrosive gases, such as sulfur, chlorine gas or acid, oxidizes the
electrode, resulting in poor solderability or corrosion of the coil wire of the product.
• Do not keep products in bulk packaging. Doing so may cause collision between the products or
between the products and other products, resulting in core chipping or wire breakage.
• Do not place the products directly on the floor; they should be placed on a palette so that they are
not affected by humidity or dust.
• Avoid keeping the products in a place exposed to direct sunlight, heat or vibration.
Transportation
Excessive vibration and impact reduces the reliability of the products. Exercise caution when
handling the products.
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P12/13
11.10 Resin coating
The inductance value may change due to high cure-stress of resin to be used for coating/molding products.
A wire breakage issue may occur by mechanical stress caused by the resin, amount/cured shape of resin, or operating
condition etc. Some resin contains some impurities or chloride possible to generate chlorine by hydrolysis under some
operating condition may cause corrosion of wire of coil, leading to wire breakage.
So, please pay your careful attention when you select resin in case of coating/molding the products with the resin.
Prior to use the coating resin, please make sure no reliability issue is observed by evaluating products mounted on your
board.
11.11 Handling of product
• Sharp material such as a pair of tweezers or other material such as bristles of cleaning brush, shall not be touched to the
winding portion to prevent the breaking of wire.
• Mechanical shock should not be applied to the products mounted on the board to prevent the breaking of the core.
11.12 Handling with mounting equipment
• With some types of mounting equipment, a support pin pushes up the product from the bottom of the base (paper) tape
when the product is sucked with the pick-up nozzle.
When using this type of equipment, detach the support pin to prevent the breaking of wire on the product.
• In some cases, the laser recognition function of the mounting equipment may not recognize this product correctly.
Please contact us when using laser recognition. (There is no problem with the permeation and reflection type.)
12.
Note
(1) Please make sure that your product has been evaluated in view of your specifications with our product being mounted to
your product.
(2) You are requested not to use our product deviating from the reference specifications.
(3) The contents of this reference specification are subject to change without advance notice. Please approve our product
specifications or transact the approval sheet for product specifications before ordering.
13. Appendix
Electrical performance: Measuring method for inductance/Q (Q measurement is applicable only when the Q value is included
in the rating table.)
Perform measurement using the method described below. (Perform correction for the error deriving from the measuring
terminal.)
(1) Residual elements and stray elements of the measuring terminal can be expressed by the F parameter for the 2-pole
terminal as shown in the figure below.
(2) The product's impedance value (Zx) and measured impedance value (Zm) can be expressed as shown below, by using
the respective current and voltage for input/output.
Zm=
V1
I1
Zx=
V2
I2
(3) Thus, the relationship between the product's impedance value (Zx) and measured impedance value (Zm) is as follows.
Zx=α
Zm-β
1-ZmΓ
Here,
α = D/A = 1
β = B/D = Zsm - (1 - Yom Zsm) Zss
Γ = C/A = Yom
Zsm: measured impedance of short chip
Zss: residual impedance of short chip (0.771 nH)
Yom: measured admittance when measuring terminal is open
MURATA MFG CO., LTD
Spec No.: JELF243A_9133D-01
P13/13
(4) Calculate inductance Lx and Qx using the equations shown below.
Im (Zx)
Lx: inductance of chip coil
Lx=
2πf
Qx: Q of chip coil
Im (Zx)
Qx=
f: measuring frequency
Re (Zx)
MURATA MFG CO., LTD
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