Product Overview
The RK73B series is a general-purpose thick film chip resistor offering 2% and 5% tolerances. Designed for broad applicability, these resistors feature lead-free terminations meeting EU RoHS requirements. They are AEC-Q200 tested across various sizes, ensuring reliability for demanding applications.
Product Attributes
- Brand: KOA Speer Electronics, Inc.
- Product Line: RK73B
- Certifications: EU RoHS compliant, AEC-Q200 tested
- Construction: Thick film chip resistor
- Termination Material: Sn Plating, Ni Plating
- Substrate: Ceramic
- Protective Coating: Resistive Film
- Inner Electrode:
Technical Specifications
| Type (Inch Size Code) | L (mm) | W (mm) | d (mm) | t (mm) | Power Rating | Rated Ambient Temp. | Rated Terminal Part Temp. | Operating Temperature Range | T.C.R. (x10-6/K) | Resistance Range | Maximum Working Voltage |
| 1F (01005) | 0.40.02 | 0.20.02 | 0.100.03 | 0.110.03 | 0.03W | 70C | 95C | -55C to +125C | 250 | 10 - 91k | 20V |
| 1H (0201) | 0.60.03 | 0.30.03 | 0.25+0.05-0.1 | 0.3+0.2-0.1 | 0.05W | 70C | 125C | -55C to +125C | 200 | 10 - 10M | 25V |
| 1E (0402) | 1.0+0.1-0.05 | 0.4+0.2-0.1 | 0.25+0.05-0.1 | 0.3+0.2-0.1 | 0.1W | 70C | 125C | -55C to +125C | 200 | 10 - 10M | 50V |
| 1J (0603) | 1.60.2 | 0.80.1 | 0.350.05 | 0.450.1 | 0.1W | 70C | 125C | -55C to +125C | 200 | 1 - 10M | 75V |
| 2A (0805) | 2.00.2 | 1.250.1 | 0.50.05 | 0.60.1 | 0.125W | 70C | 125C | -55C to +125C | 200 | 1 - 10M | 75V |
| 2B (1206) | 2.60.2 | 1.60.1 | 0.630.2 | 0.790.2 | 0.25W | 70C | 125C | -55C to +125C | 200 | 1 - 10M | 100V |
| 2E (1210) | 2.50.2 | 1.60.1 | 0.630.2 | 0.790.2 | 0.25W | 70C | 125C | -55C to +125C | 200 | 1 - 10M | 150V |
| 2H (2010) | 3.10.2 | 2.00.2 | 1.60.2 | 2.00.2 | 0.50W | 70C | 155C | -55C to +155C | 200 | 1 - 9.1M | 200V |
| W2H (2010) | 3.10.2 | 2.00.2 | 1.60.2 | 2.00.2 | 0.75W | 70C | 155C | -55C to +155C | 200 | 1.1k - 1M | 400V |
| 3A (2512) | 3.20.2 | 2.00.2 | 1.60.2 | 2.00.2 | 1.0W | 70C | 155C | -55C to +155C | 200 | 1 - 1k | 200V |
| W3A (2512) | 3.20.2 | 2.00.2 | 1.60.2 | 2.00.2 | 1.0W | 70C | 155C | -55C to +155C | 200 | 1 - 1M | 400V |
| W3A2 (2512) | 3.20.2 | 2.00.2 | 1.60.2 | 2.00.2 | 2.0W | 70C | 155C | -55C to +155C | 200 | 1 - 5.6M | 400V |
Performance Characteristics
| Parameter | Requirement | Limit | Typical | Test Method |
| Resistance | Within specified tolerance | |||
| T.C.R. | 25C +25C/-55C and +25C/+125C | Within specified T.C.R. | ||
| Overload (Short time) | Rated Voltage x 2.5 for 5 seconds (1E, 2B, W3A2: Rated Voltage x 2 for 5 seconds) | 2% | 1%: 1F 0.5%: Another | |
| Resistance to Soldering Heat | 260C 5C, 10 seconds 1 second | 1%: 1F~W3A2 (10R1M) 3%: 1F~W3A2 (R<10, R>1M) | 0.5%: 1F~W3A2 (10R1M); 1%: 1F~W3A2 (R<10, R>1M) | |
| Rapid Change of Temperature | -55C (30 minutes), +125C (30 minutes), 100 cycles | 1%: 1F 0.5%: Another | 0.5%: 1F 0.3%: Another | |
| Moisture Resistance | 40C 2C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle | 2%: 1J, 2A, 2B 3%: Another | 0.75%: 1J, 2A, 2B 1.5%: 1F; 1%: Another | |
| Endurance at 70C | 70C 2C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle | 2%: 1J, 2A, 2B 3%: Another | 0.75%: 1J, 2A, 2B 1%: Another | |
| High Temperature Exposure | +125C, 1000 hours: 1F; +155C, 1000 hours: 1E, 1H, 1J, 2A, 2B, 2E, 2H/W2H, 3A/W3A/W3A2 | 1% | 0.5%: 1F 0.3%: Another |
2410121616_KOA-RK73B2ATTD682J_C2482485.pdf
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