Wirewound Resistor
This specification covers NKNP Wirewound Resistors, designed for applications requiring compliance with RoHS environmental substance requirements. These resistors are suitable for continuous loading at a specified ambient temperature of 70, with power derating applied for temperatures exceeding this threshold. They are available in various types, rated powers, nominal resistance values, tolerances, and forms to meet diverse application needs.
Product Attributes
- Product Name: Wirewound Resistor
- Version: B/3
- Enactment Date: 2017/06/10
- Environmental Compliance: RoHS
- Construction Material (Core): High alumina ceramic
- Construction Material (Resistor Element): Resistance wire (e.g., CN49W 1.0mm)
- Construction Material (Terminal Cap): Tinned iron cap
- Construction Material (Lead Wire): Soldered or tinned annealed wire
- Finishing Painting: Silicon resin (UL-94V-0 Nonflammable)
- Indication: Color code
- Body Color (Normal Size): Gray (NKNP1/2W, NKNP1W, NKNP2W, NKNP3W)
Technical Specifications
| Type | Rated Power | Resistance Range () | Tolerance | Operating Temperature Range | Rated Voltage Formula |
| NKNP 1/2W, NKNP 1WS | 0.5W, 1W | 0.1~680 | 5% (J), 2% (G) | -55+255 | E=(PR) |
| NKNP 1W, NKNP 2WS | 1W, 2W | 0.1~680 | 5% (J), 2% (G) | -55+255 | |
| NKNP 2W, NKNP 3WS | 2W, 3W | 0.1~680 | 5% (J), 2% (G) | -55+255 | |
| NKNP 3W, NKNP 5WS | 3W, 5W | 0.1~680 | 5% (J), 2% (G) | -55+255 | |
| NKNP 5W | 5W | 0.1~680 | 5% (J), 2% (G) | -55+255 |
Characteristics
| Item | Performance Specification | Test Method (Conform to JIS C 5202) |
| Temperature Coefficient | 350PPM/ (500PPM/ < 1) | See 5.2 |
| Short Time Overload | Within (2%+0.05); No mechanical damage. | See 5.5 (Rated voltage 2.5 times, 5s) |
| Insulation Resistance | 104M or more. | See 5.6 (DC 500V for 60s) |
| Dielectric Withstanding Voltage | No flashover, arcing, or insulation breakdown. | See 5.7 (AC potential respectively for 60s) |
| Pulse Overload | Within (2%+0.05) | See 5.8 (Rated voltage 4 times, 10000 cycles) |
| Terminal Strength | No breakage or looseness. | See 6.1 |
| Resistance to Soldering Heat | Within (1%+0.05); No mechanical damage. | See 6.4 (35010, 31s) |
| Solderability | Covered with new solder by 95% at least. | See 6.5 (Solder temp: 2555, Dipping time: 31.0s) |
| Resistance to Solvent | No deterioration of coating and markings. | See 6.9 (Ultrasonic bath in alcohol for 3 minutes) |
| Temperature Cycle | Within (2%+0.05); No mechanical damage. | See 7.4 (5 cycles: -55/30min to +80/30min) |
| Load Life in Humidity | Within (5%+0.05) | See 7.9 (402, 90-95%RH, 1000h, Rated voltage cycle) |
| Load Life | Within (5%+0.05) | See 7.10 (703, 1000h, Rated voltage cycle) |
Indication
Color code is used for indication. The 5th color band is 'Green' for NKNP type (non-inductive wirewound resistors).
External Dimensions
Dimensions vary by type and size. Refer to the detailed diagrams for specific measurements.
1810311126_CCO-Chian-Chia-Elec-NKNP5WS-0-06R-5--F-_C209833.pdf
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