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The SR73 series are low resistance flat chip resistors designed for current detection in power supply and motor circuits. They offer high reliability and performance with a resistance tolerance of 0.5% and a temperature coefficient of 10010-6/K. These resistors are suitable for both reflow and flow soldering and meet EU-RoHS requirements for lead-free termination. Many models are AEC-Q200 qualified.
Reference Standards: IEC 60115-8, JIS C 5201-8, EIAJ RC-2134C
Technical Specifications
Type (Inch Size Code)
Dimensions (mm) L x W x t
Power Rating (W)
Rated Ambient Temp. (C)
Rated Terminal Part Temp. (C)
Resistance Tolerance
T.C.R. (10-6/K)
Resistance Range ()
Taping & Qty /Reel (pcs)
Weight (g/1000pcs)
1H (0201)
0.6 x 0.3 x 0.23
0.1
70
D:0.5%, F:1%, G:2%, J:5%
0+4000 (0+5000)
110 (0.2710, 0.180.24, 0.10.18)
TCM: 15,000
0.14
1E (0402)
1.0 x 0.5 x 0.35
0.166
70
125
D:0.5%, F:1%, G:2%, J:5%
2000, 3000, 5000
0.5110.0 (0.20.47, 0.10.18)
TPL: 20,000, TP: 10,000
0.68
1J (0603)
1.6 x 0.8 x 0.45
0.2
70
125
D:0.5%, F:1%, G:2%, J:5%
2000
1.110. (0.11)
TP: 10,000, 5,000
2.14
2A (0805)
2.0 x 1.25 x 0.5
0.33 (0.5 5)
70 (70 5)
125 (105 5)
D:0.5%, F:1%, G:2%, J:5%
1000, 2000, 5000, 8000
0.1510 (0.110., 0.0510.091, 0.030.047)
TP: 10,000, 5,000, 4,000
4.54
2B (1206)
3.2 x 1.6 x 0.6
0.33 (0.5 5)
70 (70 5)
125 (110 5)
D:0.5%, F:1%, G:2%, J:5%
1000, 2000, 5000, 8000
0.1510 (0.110., 0.0560.091, 0.030.051)
5,000, 4,000
9.14
2E (1210)
2.6 x 1.6 x 0.6
0.5 (0.66 5)
70 (70 5)
125 (110 5)
D:0.5%, F:1%, G:2%, J:5%
1000, 2000, 5000, 1000
0.110. (0.04710.00, 0.0360.043, 0.0240.033)
5,000, 4,000
15.50
W2H (2010)
5.0 x 2.5 x 0.65
0.75
70
125
D:0.5%, F:1%, G:2%, J:5%
1000, 2000, 5000, 8000
0.110. (0.110., 0.0560.091, 0.0330.051)
4,000
24.30
W3A (2512)
6.3 x 3.1 x 0.7
1.0
70
125
D:0.5%, F:1%, G:2%, J:5%
1000, 2000, 5000, 8000
0.110. (0.110., 0.0560.091, 0.0390.051)
4,000
37.10
W3A2 (2512)
6.3 x 3.1 x 0.7
2.0
95
D:0.5%, F:1%, G:2%, J:5%
1000, 2000, 5000, 8000
0.110. (0.110., 0.0560.091, 0.0390.051)
4,000
37.10
Applications
Current detecting resistors for power supply, motor circuits, etc.
Car electronics, Computers, HDDs, Cellular-telephones, Power supplies, and Motor circuits, etc.
Features
High reliability and performance with resistance tolerance 0.5%, T.C.R. 10010-6/K.
Suitable for both reflow and flow solderings.
Products with lead free termination meet EU-RoHS requirements.
AEC-Q200 qualified (Exemption 1H).
Derating Curve
For resistors operated at an ambient temperature of 70 or above, a power rating shall be derated in accordance with the derating curve. For resistors operated at terminal part temperature of described for each size or above, a power rating shall be derated in accordance with derating curve.
Precautions for Use
Cracks may occur at the solder connection due to thermal stress from differences in thermal expansion coefficients between the chip resistor substrate (alumina) and the mounting board, especially with larger types (W2H, W3A, W3A2) due to larger thermal expansion and self-heating. Design carefully when significant ambient temperature changes or load ON/OFF cycles are expected.
The resistance value after soldering may change depending on the size of the pad pattern or the amount of solder. Confirm the effect of resistance value changes before designing the equipment.
Company Profile
Beijing Silk Road Enterprise Management Services Co.,Ltd. is a professional company focus on integrated circuit ic business. Beijing Silk Road will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining an...
Company Profile
Beijing Silk Road Enterprise Management Services Co.,Ltd. is a professional company focus on integrated circuit ic business. Beijing Silk Road will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining an...