100W pre-charge resistor
overload-protection-resistor
100W Pre-Charge Resistor for Inrush Current Limiting in Power Systems - Image 3

100W Pre-Charge Resistor for Inrush Current Limiting in Power Systems

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Description

Overview

This 100W aluminum pre-charge resistor is designed to protect power systems and servo drives by controlling inrush current during startup. Its robust aluminum housing provides efficient heat dissipation, while the compact structure ensures easy integration into tight spaces. Ideal for industrial automation, inverters, elevators, and audio systems requiring high reliability and surge protection.

pre-charge-resistor

Operating Conditions

  • Operating temperature: -40°C to +200°C
  • Suitable for high voltage startup systems
  • Designed for industrial environments
  • Resistant to thermal cycling and vibration

Common Problems in Power Startup

  • High inrush current damaging capacitors and circuits
  • Short lifespan of components due to surge current
  • System instability during power-on
  • Lack of reliable current limiting solutions

How This Pre-Charge Resistor Solves Them

  • Limits inrush current during system startup
  • Protects capacitors and power components
  • Ensures smooth and stable power-on
  • Improves system lifespan and reliability

Dimension

pre-charge-resistor-size

Type Power (W) A ±2 B ±1 C ±1 D ±2 G ±2 F Lead Wire I ±0.5
RXP 40 80 36 13 70 60 0.75mm² 300 5
RXP 50 100 30 13 90 75 0.75mm² 300 5
RXP 60 100 30 13 90 75 0.75mm² 300 5
RXP 80 150 35 21 140 125 0.75mm² 300 6
RXP 100 130 42 21 118 108 0.75mm² 300 6
RXP 120 182 42 21 165 156 0.75mm² 300 6
RXP 150 182 42 21 165 156 0.75mm² 300 6
RXP 200 182 42 21 165 156 0.75mm² 300 6
RXP 300 230 42 21 210 200 0.75mm² 300 6

 Derating Curve

pre charge resistor derating curve

 Specification of Pre-Charge Resistor

Rated Power (W) Resistance Range (Ω) Tolerance T.C.R Max Working Voltage Max Overload Voltage Dielectric Withstanding Voltage
40 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
50 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
60 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
80 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
100 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
120 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
150 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
200 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC
300 1Ω ~ 100KΩ F±1%, G±2%, J±5%, K±10% ±300PPM/℃ 1000V 2000V 1500V/AC

 Typical Applications:

  • 🔋 Power Supplies – Limit inrush current during capacitor charging

  • ⚙️ Inverter Systems (VFDs) – Used in DC bus pre-charging circuits

  • 🏗 Servo Drives – Ensures controlled motor startup in automation systems

  • 🛗 Elevators & Lifts – Protects inverter drives from overcurrent

  • 🎧 Audio Systems – Stabilizes power during power-on in high-wattage speakers

  • 🏭 Industrial Automation – Ensures reliable power-up of control equipment

  • 🔁 UPS & Battery Systems – Pre-charge circuit for energy storage systems

  • Learn more about inrush current protection in power systems.

This 100W aluminum pre-charge resistor is ideal for protecting power systems and servo drives by limiting inrush current.
It’s widely used in inverters, power supplies, and automation control.
Explore more about our servo drive resistor solutions for reliable motor startup and protection.

Need a Custom Pre-Charge Resistor?

  • Custom resistance and wattage available
  • Engineering support for your circuit design
  • Fast sampling and production

👉 Request a Quote

 

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