High Voltage Soft Start Resistor
Non-Inductive High Voltage Resistor
Capacitor-Charging-Resistor
Power Supply Startup Resistor

High Voltage Soft Start Resistor for Safe Inverter Startup

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Description

Product Overview

The high voltage soft start resistor is a vital component for managing inrush current during inverter and power supply startup. By gradually charging capacitors, it helps reduce electrical stress and protects sensitive components from sudden surges. As a result, overall system stability improves, and the lifespan of key devices is extended. Moreover, the resistor’s non-inductive construction makes it highly suitable for high-speed switching and pulse load applications in industrial systems.

Non-Inductive High Voltage Resistor

Product size table

Non-Inductive-High-Voltage-Resistor

Type Rated Power (W) Structural type Size (unit：MM) Resistance range (Ω) Maximum operating voltage(KV) Temperature coefficient(10-6/℃) Operating temperature(℃) Resistance Tolerance(%)
Lmax Dmax L1 d
RI80 3 A 24±2 8±1 30±3 1±0.1 100~2G 5  

 

≤±200ppm

  -55℃~+70℃   

F(±1%)

G(±2%)

J(±5%)

K(±10%)

 

 
RI80 5 A/B 51±2 8±1 30±3 1±0.1 100~2G 10
RI80 10 A/B 72±2 12±1 30±3 1±0.1 100~2G 15
RI80 20 A/B 102±2 12±1 30±3 1±0.1 100~200M 20 ≤±400ppm
RI80 25 A/B 127±2 12±1 30±3 1±0.1 100~200M 30
RI80 30 A/B 152±2 12±1 30±3 1±0.1 100~200M 40
RI80 50 B/C 120±2 22±1 10±1 M6 100~200M 50
RI80 75 B/C 130±2 27±1 10±1 M6 100~200M 70
RI80 100 B/C 170±2 27±1 10±1 M6 100~100M 100
RI80 200 B/C 260±2 27±1 10±1 M5/M6 100~100M 100
RI80 300 B/C 310±2 27±1 10±1 M5/M6 100~100M 100
RI80 500 B/C 310±2 53±1 10±1 M8 100~100M 100

Why Use High Voltage Soft Start Resistors?

 Inrush Current Control for Safer Startups

 Protects converters, rectifiers, and IGBTs During initial power-on, inverters and power supplies experience high inrush current. However, soft start resistors manage this current by gradually charging the input capacitors, thereby preventing damage and reducing startup noise.

Electrical Characteristics

Parameter Value
Resistance Range 100Ω – 2000MΩ
Rated Voltage 5kV – 100kV
Power Rating 3W – 500W
TCR ±100ppm/°C (typical)
Tolerance ±1%、±3%、±5%、±10%
Construction Thick Film, Glass Glaze
Mounting Axial / Screw Terminal

Applications Across Industries

  • Inverter and VFD pre-charge circuits

  • High-voltage DC power supply startup

  • Capacitor charging and discharging modules

  • Pulse power equipment

  • Medical X-ray and CT systems

  • Industrial automation systems

Furthermore, their compact size and customizable specifications make them easy to integrate into control panels, test equipment, and high-energy discharge systems.

Looking for general-purpose HV resistors? Explore our high voltage thick film resistor series

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