KNP/NKNP WIREWOUND RESISTORS
FEATURES
■ Products meet EU-RoHS requirements.
■ Low resistance.
■ Approved to CQC
DERATING CURVE
MAIN PARAMETER
| Type | Rtated power(W) | Resistance Range | Resistance tolerance | Dimension（mm） | Remark | ||||
| D±0.5 | L±1.0 | d±0.1 | |||||||
| KNP/NKNP | 0.25W | 0.5WS | 0.01-20 | 0.01-20 | ±5% | 6.5 | 2.5 | 0.45 | |
| KNP/NKNP | 0.5W | 1WS | 0.01～68 | 0.01～68 | 3.5 | 9.5 | 0.50 | ||
| KNP/NKNP | 1W | 2WS | 0.01～100 | 0.01～100 | 4.5 | 11.5 | 0.60 | ||
| KNP/NKNP | 2W | 3WS | 0.01～200 | 0.01～150 | 5.0 | 15.5 | 0.75 | ||
| KNP/NKNP | 3W | 5WS | 0.01～680 | 0.01～200 | 6.0 | 17.5 | 0.75 | ||
| KNP/NKNP | 5W | 7WS | 0.01～750 | 0.01～470 | 8.0 | 24.0 | 0.75 |
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Rated Ambient Temperature ：+70℃
Operating Temperature Range：-55℃～+155℃
Rated voltage = √Power Rating×Resistance value or Max. working voltage, whichever is lower.
ELECTRICAL PERFORMANCE
| Test Items | Performance Requirements | Test Methods |
| Short Time Overload | △R≤±（1%R+0.05Ω） | 2.5 times rated voltage、5S |
| Solderability | Over 95% of area wire covered with solder | 260±10℃、2±0.5S |
| Robustness of Terminations | △R≤±（1%R+0.05Ω） | Tensile:10N、10±1S Bending:2×90° Torsion:2×180° |
| Resistance to soldering heat | △R≤±（1%R+0.05Ω） | 260±10℃、10±1S or 350±5℃ 3.5±0.5S |
| Rapid change temperature | △R≤±(1%R+0.05Ω) | -55±3℃、30min; 155±3℃、30min 5 cycles |
| Temperature Coefficient | TCR≤±250PPM/℃ | Room Temperature +100℃、and keep on 30～40min |
| Endurance | △R≤±(5%R+0.1Ω) | 70±2℃、1000h，Rated direct voltage 1.5h ON、0.5h OFF cycles. |
| Damp Heat Steady State | △R≤±(5%R+0.1Ω) | 40±2℃、90～95%RH、56 days. |
