Low resistance flat chip resistors KOA SR731JTTDR820F for current detection in power supply circuits
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Negotiable
MOQ:
Negotiable
Delivery Time:
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Product Description
Product Overview
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. They are AEC-Q200 qualified (excluding 1H type).
Product Attributes
- Brand: KOA
- Product Line: SR73
- Type: Low Resistance Flat Chip Resistors
- Certifications: EU-RoHS, AEC-Q200 (Exemption 1H)
- Material: Ceramic substrate, resistive film, internal electrode, Ni plating, solder plating
- Coating Color: Black (1H), Indigo (1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2)
- Origin: Japan (implied by manufacturer)
Technical Specifications
| Type | Inch Size Code | Dimensions (mm) L x W x t | Power Rating | Rated Ambient Temp. (C) | Rated Terminal Part Temp. (C) | Resistance Tolerance | Resistance Value Range () | T.C.R. (10-6/K) | Taping & Qty /Reel (pcs) | Weight (g/1000pcs) |
| 1H | 0201 | 0.60.03 x 0.30.03 x 0.230.03 | 0.1W | 70 | D:0.5% F:1% | 110 0.2710 | 0+4000 0+5000 | TCM: 15,000 | 0.14 | |
| 1E | 0402 | 1.0 x 0.5 x 0.350.05 | 0.166W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 0.5110.0 0.20.47 0.10.18 | 2000 3000 5000 | TPL: 20,000 TP: 10,000 | 0.68 |
| 1J | 0603 | 1.60.2 x 0.8 x 0.450.1 | 0.2W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 1.110. 0.11. 0.10.18 | 2000 3000 5000 | TP: 10,000 5,000 | 2.14 |
| 1J | 0603 | 1.60.2 x 0.8 x 0.450.1 | 0.25W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 0.11. 0.10.18 | 2000 3000 5000 | TP: 10,000 5,000 | 2.14 |
| 2A | 0805 | 2.00.2 x 1.250.1 x 0.50.1 | 0.33W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 0.1510 0.110. 0.0510.091 0.030.047 | 1000 2000 5000 8000 | TP: 10,000 5,000 4,000 | 4.54 |
| 2A | 0805 | 2.00.2 x 1.250.1 x 0.50.1 | 0.5W | 70 | 105 | D:0.5% F:1% G:2% J:5% | 0.1510 0.110. 0.0510.091 0.030.047 | 1000 2000 5000 8000 | TP: 10,000 5,000 4,000 | 4.54 |
| 2B | 1206 | 3.20.2 x 1.60.2 x 0.60.1 | 0.33W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 0.1510 0.110. 0.0560.091 0.030.051 | 1000 2000 5000 8000 | 5,000 4,000 | 9.14 |
| 2B | 1206 | 3.20.2 x 1.60.2 x 0.60.1 | 0.5W | 70 | 110 | D:0.5% F:1% G:2% J:5% | 0.1510 0.110. 0.0560.091 0.030.051 | 1000 2000 5000 8000 | 5,000 4,000 | 9.14 |
| 2E | 1210 | 2.60.2 x 2.00.2 x 0.60.1 | 0.5W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 0.110. 0.04710.00 0.0360.043 0.0240.033 | 1000 2000 5000 1000 | 5,000 4,000 | 15.50 |
| 2E | 1210 | 2.60.2 x 2.00.2 x 0.60.1 | 0.66W | 70 | 110 | D:0.5% F:1% G:2% J:5% | 0.110. 0.04710.00 0.0360.043 0.0240.033 | 1000 2000 5000 1000 | 5,000 4,000 | 15.50 |
| W2H | 2010 | 5.00.2 x 2.50.2 x 0.650.15 | 0.75W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 0.110. 0.0560.091 0.0330.051 | 1000 2000 5000 8000 | 4,000 | 24.30 |
| W3A | 2512 | 6.30.2 x 3.10.2 x 0.70.1 | 1W | 70 | 125 | D:0.5% F:1% G:2% J:5% | 0.110. 0.0560.091 0.0390.051 | 1000 2000 5000 8000 | 4,000 | 37.10 |
| W3A2 | 2512 | 6.30.2 x 3.10.2 x 0.70.1 | 2W | 70 | 95 | D:0.5% F:1% G:2% J:5% | 0.110. 0.0560.091 0.0390.051 | 1000 2000 5000 8000 | 4,000 | 37.10 |
Features & Applications
- Features: Current detecting resistors for power supply, motor circuits, etc. High reliability and performance (0.5% tolerance, 10010-6/K TCR). Suitable for reflow and flow soldering. Lead-free termination meets EU-RoHS. AEC-Q200 qualified (Exemption 1H).
- Applications: Car electronics, Computers, HDDs, Cellular-telephones, Power supplies, Motor circuits, etc.
Derating Curve
For resistors operated at an ambient temperature of 70 or above, or at a terminal part temperature above the specified limit, power rating shall be derated in accordance with the provided derating curves.
Precautions for Use
- Alumina substrate can lead to solder joint cracks under thermal stress (heat cycles). Larger types (W2H, W3A, W3A2) are more susceptible due to larger thermal expansion and self-heating. Careful design is needed for applications with significant ambient temperature fluctuations or frequent load ON/OFF cycles. Factors like pad size, solder volume, and board heat dissipation influence crack occurrence.
- Soldering pad pattern size and solder amount can affect post-soldering resistance values. Verify the impact of resistance change on equipment design beforehand.
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Company
Beijing Silk Road Enterprise Management Services Co., Ltd.
Location
16 Floor, Unit B, Jiatai International Mansion, No 41, Dongsihuan Zhong Road, Chaoyang District, Beijing
Contact Person
Sellina