30W, 40W high - pulse overload resistors.

Application Scenarios

• Suitable for installations without air cooling (enhanced performance with fans).

• Ideal for circuits requiring short-term absorption of large pulse energy.

• Features: Inductance-free, high thermal capacity, high temperature resistance, compact size, stable performance.

• Applications: Random strong pulse energy discharge resistors, braking resistors for variable frequency motors, etc.

Technical Characteristics

• Pulse electrical load testing using an RC circuit (specific parameters detailed below).

• Special external structure design:

• Thick-film resistor fired onto a 96% high-quality cylindrical ceramic substrate.

• Brass terminals crimped on both ends with M4 threaded holes for lead-out and support.

• Excellent pulse load capacity.

• UL94 - V0 compliant raw materials.

Specifications

• Resistance Range: 10Ω～1kΩ (custom resistances available upon request).

• Resistance Accuracy: ±5%～±10%.

• Temperature Coefficient: ±250ppm/°C (25°C～85°C) (custom coefficients available upon request).

• Thermal Capacity:

• 30W: 0.031KJ/°C

• 40W: 0.063KJ/°C

• Maximum Impulse Voltage: 1500V.

• Rated Power (70°C): 30W, 40W.

• Resistor Installation: M4 screw with a maximum torque of 3Nm.

Technical Parameters

30W Model (70°C)

• Time Constant (=0.5S): E = 2000J / single pulse.

• Dimensions (A): 62.0mm (±0.50mm) / 2.44 inches (±0.02 inches).

• Dimensions (ΦB): 15.0mm (±0.50mm) / 0.59 inches (±0.02 inches).

40W Model (70°C)

• Time Constant (=0.5S): E = 2800J / single pulse.

• Dimensions (A): 62.0mm (±0.50mm) / 2.44 inches (±0.02 inches).

• Dimensions (ΦB): 21.0mm (±0.50mm) / 0.83 inches (±0.02 inches).