Inrush Current Limiting Resistor
High Power Industrial Resistor
RXLG brake resistor
Servo drive resistor

High Power Inrush Current Resistor with aluminum for Servo Drives

  • Rated Power: 1.2K~6KW / Custom

  • Resistance Tolerance: ±1% / ±5%

  • Housing: Anodized Aluminum Shell

  • Mounting: Cooling plate or screw mount

  • Custom Design: Supported

Category:

Description

Product Overview

This high-power inrush current resistor is specially designed for servo drive and inverter systems, helping to protect circuits by limiting surge current at startup.
With an aluminum shell for efficient heat dissipation and a compact size for easy installation, it offers excellent overload capacity, high insulation, and stable performance.
Available in multiple resistance values and power levels, and supports customization based on application needs.

🔹 Features

  • Limits inrush current during power-up
  • Aluminum housing for enhanced heat dissipation
  • Compact and robust structure for industrial environments
  • High overload capacity and long-term stability
  • RoHS compliant and flame-retardant encapsulation

🔹 Applications

  • Servo drive systems
  • Inverter and motor control units
  • Power supply startup protection
  • Automation equipment and elevators

Inverter startup protection resistor

Dimension

RXLG resistor

Model rated power
(KW)		 L W H L×W
D1×W1
Pin pitch		 Mounting opening Lead wire
(mm)
(Optional cable length)
RXLG 1.2 250 150 G 236×70 8 500
1.5 280 150 61 266×70 8 500
2 310 150 61 296×70 8 500
2.5 350 150 336×70 8 500
3 400 150 61 386×70 8 500
4 380 150 61 366×70 8 500
4.5 410 150 61 396×70 8 500
5 460 150 61 446×70 8 500
5.5 500 150 61 486×70 8 500
6 550 150 61 536×70 8 500

VFD Power vs. Braking Resistor Power Selection Table (General Reference)

VFD Power (kW) Recommended Resistor Power (W) Recommended Resistance (Ω) Notes
0.75 kW 100–200 W 100–150 Ω Light-duty, fans
1.5 kW 200–400 W 75–100 Ω –
2.2 kW 300–600 W 60–80 Ω Standard braking
3.7 kW 600–800 W 40–60 Ω –
5.5 kW 800–1000 W 30–50 Ω Common industrial use
7.5 kW 1.0–1.5 kW 20–40 Ω –
11 kW 1.5–2.0 kW 15–25 Ω –
15 kW 2.0–3.0 kW 10–20 Ω –
18.5 kW 3.0–4.0 kW 8–15 Ω Heavy-duty applications
22–30 kW 4.0–6.0 kW 6–10 Ω Large equipment
37–45 kW 6.0–8.0 kW 4–8 Ω Cranes, hoists
≥55 kW ≥10 kW 2–5 Ω May use multiple resistors in parallel

Typical Applications

  • Industrial Automation Equipment

  • Variable Frequency Drive (VFD) Braking Systems

  • Elevators and Hoisting Machinery

  • CNC Machine Tools

  • HVAC Control Systems

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