300W Power Ribbon Wirewound Resistors
Technical Parameters
Performance Specifications
| Rated voltage | Rated power (W) × nominal resistance (Ω) Vdc |
| Max. voltage | 1000V |
| Max. overload voltage | 3000V |
| Tolerance | J(±5%) |
| Resistance range | 7R |
| Operating temperature range | ±70℃ |
Performance Specifications
| Item | Requirements | Test method |
| Surface temperature rise | TCR ≤ 275ppm/℃ | At rated power (PR) |
| Short-time overload | ΔR/R≤±(1% 0.05Ω), legible markings, no visible damage | The applied voltage is the lower one between 10 times rated voltage and the max. overload voltage, and the time is 5 seconds. |
| Dielectric withstanding voltage | No flashover or insulation breakdown | The peak value for AC is 1000V, and time duration is 1 minute. |
| Resistance to vibration | ΔR/R≤±(1% 0.05Ω), no visible damage | 10~500Hz, 3 directions, 2 hours each |
| Resistance to soldering heat | ΔR/R≤±(1% 0.05Ω), legible markings, no visible damage | 350±10℃, 3.5±0.5s |
| Temperature cycling | ΔR/R≤±(2% 0.05Ω), no visible damage | -70℃ /15℃/70℃ /15℃ for consecutive 5 cycles |
| Damp heat, steady state | ΔR/R≤±(2% 0.05Ω), no visible damage | 40℃ , 95%RH, 1344 hours |
| Load life at 70℃ | ΔR/R≤±(5% 0.1Ω), legible markings, no visible damage | Room temperature, rated power,1000 hours |
Related Names
Precision Power Resistor | Damping Resistor | High Current Resistor
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Links：https://globefindpro.com/products/85880.html
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