250W Planar Thick Film, Non-inductive High-power Resistor

Technical features

1. The central temperature of the base plate is ≤ 85°C, and the rated power is 250W.

2. A specially - designed external structure, with springs connecting between the chip and the shell, and fixed with two M4 screws, ensuring that the attachment pressure of the heat sink is between 120 and 160 Newtons.

Specifications

1. Resistance range: 0.5Ω - 1MΩ

2. Resistance accuracy: ±5% - ±10%

3. Temperature coefficient: ±150ppm/°C (25°C - 105°C), other temperature coefficient requirements can be negotiated for orders.

1. Rated power at 85°C is 250W, and the maximum operating voltage does not exceed 5,000VDC.

2. Short - term overload: 400W, 70°C, 10 seconds, ΔR ≤ (0.4% + 0.001Ω)

3. Peak current: under conditions of low resistance and narrow pulse, it can reach up to 1500 Amp.

4. Insulation layer withstand voltage: 6kV, 50Hz, 1min, and can reach up to 8kVrms according to requirements.

5. Partial discharge: 3kVrms, <10pC, and can reach up to 5kVrms according to requirements.

6. Insulation resistance: 500V, minimum 10GΩ

7. Creepage distance: minimum 42mm

8. Clearance distance: minimum 14mm

9. Inductance: ≤ 60nH

10. Distributed capacitance (Mass): ≤ 110pF

11. Distributed capacitance (Parallel): ≤ 40pF

12. Moisture resistance characteristics: 56 days/40°C, RH≥95%, ΔR ≤ (0.25% + 0.001Ω)

13. Temperature cycling: -55°C / +125°C (each 0.5h), 5 cycles, ΔR ≤ (0.2% + 0.001Ω)

14. High - frequency vibration: MIL - Std - 202, method 204, condition D, ΔR ≤ (0.2% + 0.001Ω)

15. Power durability: rated power for 1,000h, base plate temperature at 85°C, ΔR ≤ (0.4% + 0.001Ω)

16. Operating temperature range: -55°C ~ +155°C

17. Terminal installation: M4/M5 screws, maximum torque 2Nm.

18. Resistance installation: M6 screws, maximum torque 3Nm.