80W 20Ω Cement Resistor for Soft Start & Surge Protection
80W 20Ω Cement Resistor for Soft Start & Surge Protection - Image 2
80W 20Ω Cement Resistor for Soft Start & Surge Protection - Image 3

80W 20Ω Cement Resistor for Soft Start & Surge Protection

Rated power range: 80W
Working voltage range: <1000V
Rated resistance range: 0.1Ω~10KΩ
Maximum withstand voltage: 1500V
Maximum accuracy: 1%
IP level: IP33
Vibration: 0.5g
Temperature drift range: ≤400ppm/℃
Working temperature range: -55℃～+275℃
Application areas: power supply system, charging equipment

Category:

Description

80W Ceramic Cement Resistor for Soft Start & Surge Protection

The 80W cement resistor from our BKG series is engineered for soft start and surge protection applications in industrial power systems. Designed with a durable ceramic housing and magnetic tape winding, this 20Ω resistor delivers stable performance in pre-charge, capacitor discharge, and energy absorption circuits. It’s a cost-effective, flameproof solution ideal for inverter and motor control units.The resistor has high load, heat dissipation characteristics, non-flammability, good high-frequency characteristics, and pulse resistance.

Key Features

  • Rated Power: 80W continuous

  • Resistance: 20Ω ±5% (20RJ)

  • Housing: Industrial-grade high-frequency ceramic

  • Insulation Resistance: ≥100MΩ

  • Construction: Magnetic tape winding (standard inductive type)

  • Flameproof and explosion-resistant body

  • Excellent thermal dissipation

  • Shock and vibration tolerant

  • Customizable resistance values and lead lengths available 

Product Dimensions

80W ceramic resistor

Rated Power
(W)		 L±1 L1±1 L2±10 W±0.5 H±0.5 M±0.2 N±0.2 Resitance range
(2)		 Outlet mode  Weight
(G)
60W 90 35 200 45 15 10 5 0.1~10K lead wire 140
80W 90 35 200 45 15 10 5 0.1~10K lead wire 140
100W 90 35 200 45 15 10 5 0.1~10K lead wire 140

Electrical Characteristics

Property Test Method Performance Requirements Test Standard
Terminal Strength 20N tensile load for 10 seconds No visible damage GB/T5729 4.16
Vibration Resistance Frequency 10Hz–500Hz, acceleration 10g No visible damage GB/T5729 4.22
Short-time Overload 10× rated power for 5 seconds ΔR ≤ ±(2%R + 0.1Ω) GB/T5729 4.13
Insulation Resistance 500V ±50V DC between leads and aluminum housing ≥100MΩ GB/T5729 4.6.1.3
Dielectric Withstanding Voltage 1000Vac, 5mA, 1 minute No breakdown or flashover GB/T5729 4.7
Load Life Rated power for 96h (1.5h ON / 0.5h OFF cycles at room temperature) No visible damage GB/T5729 4.25.2
Damp Heat, Steady State (40±2)℃, (93±3)%RH, 96 hours ΔR ≤ ±(5%R + 0.1Ω) GB/T5729 4.24.2.1.a
Rapid Temperature Change -55℃ to +155℃, 5 cycles ΔR ≤ ±(2%R + 0.1Ω) GB/T5729 4.19

Resistor usage recommendations

It is recommended to leave 1.5 times the power margin when using resistors in circuits. For example, if the voltage in the circuit is 100V and the current is 0.01A, the power is calculated as: P=100*0.01=1W. At this time, a 1W resistor cannot be used, so 1*1.5=1.5W is calculated. There is no 1.5W resistor, so a 2W resistor is required.

Applications

  • Inverter soft start and pre-charge circuits

  • Capacitor discharge in power supply units

  • Surge and inrush current protection in motor drives

  • Energy dissipation in industrial control systems

  • General-purpose load resistor for automation equipment

Looking for a customized resistance value, lead length, or faster lead time?
Contact us now for samples, pricing, and datasheets tailored to your project.