400W Planar Alloy Foil, Non-inductive High-power Resistor

Technical Features

• Base Center Temperature: ≤85°C

• Rated Power: 400W/600W

• Special Design: The external structure is specially designed with a spring connection between the chip and the outer shell. Fixed installation using two M4 screws ensures that the heat sink attachment pressure is between 120 to 160 Newtons.

• Pulse Load Capability: Extremely strong pulse load capability can withstand the following test conditions:

• E = Exponential pulse, f = 8Hz, time constant = 15μs, single pulse energy E = 50J

• Raw Materials: Passed UL94-V0

Specifications

• Resistance Range: 0.1Ω ~ 10Ω

• Tolerance: ±1% ~ ±10% (Higher precision available upon request)

• Temperature Coefficient: ±50ppm/°C ~ ±120ppm/°C (25°C ~ 105°C), other temperature coefficients available upon request

• Rated Power: 85°C rated power, UXM400 for 400W, UXM600 for 600W, maximum operating voltage not exceeding 5000VDC.

• Short-term Overload: UXM400 for 600W, 70°C, 10 seconds, ΔR ≤ ±(0.4%R + 0.001Ω); UXM600 for 1000W, 70°C, 10 seconds, ΔR ≤ ±(0.4%R + 0.001Ω)

• Insulation Withstand Voltage: 6kVrms, 50Hz, 1 minute, maximum 12kVrms upon request.

• Partial Discharge: Based on customer requirements.

• Insulation Resistance: 1000V, minimum 1GΩ.

• Creepage Distance: Minimum 42mm.

• Clearance: Minimum 14mm.

• Inductance: ≤400nH.

• Distributed Capacitance (Mass): ≤110pF.

• Moisture Resistance: 56 days/40°C, RH ≥ 95%, ΔR ≤ ±(0.25%R + 0.001Ω).

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

• High-frequency Vibration: MIL-Std-202, method 204, condition D, ΔR ≤ ±(0.2%R + 0.001Ω).

• Power Endurance: Rated power 1,000 hours, base temperature 85°C, ΔR ≤ ±(0.4%R + 0.001Ω).

• Operating Temperature Range: -55°C ~ +155°C.

• Terminal Installation: M4/M5 screw, maximum torque 2Nm.

• Resistor Mounting: M4 screw, maximum torque 1.8Nm.