Allen-Bradley 81003-438-51-R SCR (Silicon-Controlled Rectifier) Rectifier Assembly

Product Overview

The Allen-Bradley 81003-438-51-R is an SCR (Silicon-Controlled Rectifier) rectifier assembly designed for use in high-power AC drive systems. It functions as a gate driver board, regulating DC power flow to motors and enabling precise control of motor speed and direction. This module is commonly integrated into Allen-Bradley PowerFlex drives and other industrial motor control systems.

Technical Specifications

• Model Number: 81003-438-51-R

• Type: SCR Rectifier Assembly / Gate Driver Board

• Rated Input Voltage: 3-phase, 480V AC

• Rated Output Voltage: 3-phase, 480V AC

• Input Current: 48 A

• Output Current: 22 A nominal, 30 A peak2

• Power Rating: 10 HP (7.5 kW)

• Control Voltage: 24 VDC logic input

• Output Voltage Range: Up to 240 VAC or 320 VDC

• Operating Temperature: -40°C to +85°C

• Dimensions: 200 × 110 × 30 mm (7.87 × 4.33 × 1.18 in)

• Weight: 0.54 kg (1.2 lbs)