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. AEC-Q200 qualified (excluding 1H type).
Product Attributes
- Brand: KOA
- Product Line: SR73
- Type: Low Resistance Flat Chip Resistors
- Certifications: EU-RoHS compliant (lead-free termination), AEC-Q200 qualified (Exemption 1H)
- Materials: Ceramic substrate, resistive film, internal electrode, Ni plating, solder plating. Gold plated electrodes available for 1J, 2A, 2B (0.1 to 10).
- Coating Color: Black (1H), Indigo (1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2)
- Origin: Japan (implied by manufacturer and datasheet language)
Technical Specifications
| Type (Inch Size Code) | Dimensions (mm) L x W x t | Weight (g/1000pcs) | Power Rating | Rated Ambient Temp. () | Rated Terminal Part Temp. () | T.C.R. (10-6/K) | Resistance Range () | Taping & Qty /Reel (pcs) |
| 1H (0201) | 0.60.03 x 0.30.03 x 0.230.03 | 0.14 | 0.1W | 70 | 0 to +4000 / 0 to +5000 | 1 to 10 / 0.27 to 10 / 0.18 to 0.24 | TCM: 15,000 | |
| 1E (0402) | 1.0 x 0.5 x 0.350.05 | 0.68 | 0.166W | 70 | 125 | 2000 / 3000 / 5000 | 0.51 to 10.0 / 0.2 to 0.47 / 0.1 to 0.18 | TPL: 20,000, TP: 10,000 |
| 1J (0603) | 1.60.2 x 0.8 x 0.450.1 | 2.14 | 0.2W | 70 | 125 | 2000 | 1.1 to 10. | TP: 10,000, 5,000 |
| 1J | 1.60.2 x 0.8 x 0.450.1 | 2.14 | 0.25W | 70 | 125 | 2000 | 0.1 to 1. | TP: 10,000, 5,000 |
| 2A (0805) | 2.00.2 x 1.250.1 x 0.50.1 | 4.54 | 0.33W | 70 | 125 | 1000 / 2000 / 5000 / 8000 | 0.15 to 10 / 0.1 to 10. / 0.051 to 0.091 / 0.03 to 0.047 | TP: 10,000, 5,000, 4,000 |
| 2A | 2.00.2 x 1.250.1 x 0.50.1 | 4.54 | 0.5W | 70 | 105 | 1000 / 2000 / 5000 / 8000 | 0.15 to 10 / 0.1 to 10. / 0.051 to 0.091 / 0.03 to 0.047 | TP: 10,000, 5,000, 4,000 |
| 2B (1206) | 3.20.2 x 1.60.2 x 0.60.1 | 9.14 | 0.33W | 70 | 125 | 1000 / 2000 / 5000 / 8000 | 0.15 to 10 / 0.1 to 10. / 0.056 to 0.091 / 0.03 to 0.051 | 5,000, 4,000 |
| 2B | 3.20.2 x 1.60.2 x 0.60.1 | 9.14 | 0.5W | 70 | 110 | 1000 / 2000 / 5000 / 8000 | 0.15 to 10 / 0.1 to 10. / 0.056 to 0.091 / 0.03 to 0.051 | 5,000, 4,000 |
| 2E (1210) | 2.60.2 x 1.60.2 x 0.60.1 | 15.50 | 0.5W | 70 | 125 | 1000 / 2000 / 5000 / 1000 | 0.1 to 10. / 0.047 to 10.00 / 0.036 to 0.043 / 0.024 to 0.033 | 5,000, 4,000 |
| 2E | 2.60.2 x 1.60.2 x 0.60.1 | 15.50 | 0.66W | 70 | 110 | 1000 / 2000 / 5000 / 1000 | 0.1 to 10. / 0.047 to 10.00 / 0.036 to 0.043 / 0.024 to 0.033 | 5,000, 4,000 |
| W2H (2010) | 5.00.2 x 2.50.2 x 0.650.15 | 24.30 | 0.75W | 70 | 125 | 1000 / 2000 / 5000 / 8000 | 0.1 to 10. / 0.1 to 10. / 0.056 to 0.091 / 0.033 to 0.051 | 4,000 |
| W3A (2512) | 6.30.2 x 3.10.2 x 0.650.15 | 37.10 | 1W | 70 | 125 | 1000 / 2000 / 5000 / 8000 | 0.1 to 10. / 0.1 to 10. / 0.056 to 0.091 / 0.039 to 0.051 | 4,000 |
| W3A2 (2512) | 6.30.2 x 3.10.2 x 0.650.15 | 37.10 | 2W | 95 | 1000 / 2000 / 5000 / 8000 | 0.1 to 10. / 0.1 to 10. / 0.056 to 0.091 / 0.039 to 0.051 | 4,000 |
Applications
- Car electronics
- Computers
- HDDs
- Cellular-telephones
- Power supplies
- Motor circuits
Features
- Current detecting resistors for power supply, motor circuits, etc.
- 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).
Precautions for Use
Care should be taken regarding the occurrence of cracks at the solder connection due to thermal stress, especially for larger types (W2H, W3A, W3A2) with significant thermal expansion and self-heating. The size of the land pattern, solder volume, and heat dissipation of the mounting board can influence crack occurrence. Resistance values may fluctuate after soldering based on pad pattern size and solder amount; confirm effects before designing.
2410121322_KOA-SR732ATTDR100F_C186573.pdf
Please Use Our Online Inquiry Contact Form Below If You Have Any Questions, Our Team Will Get Back To You As Soon As Possible
