WIREWOUND RESISTORS
Power Precision Wirewound Resistors
| KNP-R
The resistors are also encapsulated with ceramic-silicone coating compound using advanced encapsulation mould/die technologies. This KNP-R version has ultralow ohmic values for current sensing applications. An ultrahigh ohmic value and noninductive windings are available. The KNP-R series is lead-free, RoHS compliant and MIL-R-26F standard. Characteristics U:
Characteristics V:
Tokenchina KNP-R series have an operating temperature range of -55°C ~ +375°C, They must be derated at high ambient temperatures according to the Power Derating Chart. |
The new KNP-R series moulded axial leaded wirewound resistors from Tokenchina use high-purity alumina ceramic cores with wire winding by high precision machine tools to ensure total operational consistency throughout.
Technical Specifications & Dimensions - Precision Wirewound KNP-R
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| Type | MIL - R-26E |
Power Rating (W) |
Max. Working Voltage (V) |
Resistance Range (Ω) | Dimensions (mm) | |||||
| U | V | U | V | 0.1% 0.25% 0.5% | 1% 2% 3% 5% | L±0.81 | D±0.81 | d±0.1 | ||
| KNP-R1/4 | - | 0.40 | - | 20 | - | 10~950 | 1~3.4K | 6.35 | 1.98 | 0.51 |
| KNP-R1/2 | RW70 | 0.75 | - | 29 | - | 10~1.3K | 1~4.9K | 7.92 | 1.98 | 0.51 |
| KNP-R1A | - | 1.00 | - | 53 | - | 1~2.7K | 0.1~10.4K | 10.31 | 2.36 | 0.64 |
| KNP-R1 | RW69 | 1.10 | - | 62 | - | 1~4.0K | 0.1~15K | 13.49 | 2.36 | 0.64 |
| KNP-R2A | - | 2.50 | 3.25 | 138 | 157 | 1~8.6K | 0.01~32.3K | 12.70 | 5.33 | 0.81 |
| KNP-R2 | RW79 | 3.00 | 3.75 | 135 | 148 | 1~5K | 0.01~2K | 13.49 | 4.06 | 0.81 |
| KNP-R3A | - | 3.00 | 3.75 | 135 | 148 | 1~6.5K | 0.01~34.5K | 14.27 | 5.33 | 0.81 |
| KNP-R3 | - | 3.25 | 4.75 | 185 | 220 | 1~11.4K | 0.01~42.1K | 20.62 | 5.33 | 1.02 |
| KNP-R4 | RW67 | 4.00 | 5.50 | 210 | 250 | 1~12.7K | 0.01~47.1K | 15.88 | 7.62 | 1.02 |
| KNP-R5 | RW74 | 5.00 | 6.50 | 330 | 376 | 0.5~24.5K | 0.01~51K | 22.22 | 7.62 | 1.02 |
| KNP-R7 | RW68 | 7.00 | 9.00 | 504 | 576 | 0.5~41.4K | 0.01~75K | 30.94 | 9.52 | 1.02 |
| KNP-R10 | RW78 | 10.00 | 13.00 | 799 | 911 | 0.5~71.3K | 0.01~82K | 45.21 | 9.52 | 1.02 |
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Electrical Characteristics - Precision Wirewound KNP-R
| Test Items | Test Method | Specifications |
| Load Life | +25°C, 1.5Hrs on ~ 0.5Hrs off cycle, 1000 Hrs. | U: ΔR±(1%+0.05Ω) V: ΔR±(3%+0.05Ω) |
| Rated Load | Rated wattage 30 minutes. | ΔR±(1%+0.05Ω) |
| Temp. Cycle | -20°C ~ 85°C 5 cycles | ΔR±(1%+0.05Ω) |
| Incombustibility | 16 times of rated wattage for 5 min. | Not flamed |
| Voltage Withstanding | 500VAC 1 minute. | ΔR±(1%+0.05Ω) |
| Insulation Resistance | 500V | 20MΩ |
| Short Time Overload | 2.5 times of rated voltage 5 sec. | ΔR±(2%+0.05Ω) |
| Soldering After Resistance | 235°C for 3 sec | ΔR±(0.5%+0.05Ω) |
How to Order - Power Precision Wirewound KNP- R
| KNP-R3A | U | 3R85 | B | P | |||||||||||||||||||||||||||||||||||||||
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