SGCT Matched Set Service Kit | Allen-Bradley 81001-450-52-R

Allen-Bradley 81001-450-52-R PowerFlex Matched SGCT Thyristor Set

Product Description

The 81001-450-52-R (81001-450-52-R) is a high-capacity power block service kit designed for Allen-Bradley PowerFlex 7000 medium-voltage drive systems. This kit features a "Matched Set" of Symmetrical Gate-Commutated Thyristors (SGCTs), which are specialized power semiconductors engineered for the most demanding switching, rectification, and inverter applications. Unlike standard thyristors, these SGCTs are factory-matched to ensure identical electrical characteristics, preventing current imbalance and thermal stress when operating in parallel or series configurations.

This 81001-450-52-R (81001-450-52-R) assembly is a critical component for maintaining the power conversion stage of high-power drives. It provides the switching speed of an IGBT combined with the low conduction losses of a GTO thyristor. Housed in a robust power block package, the set is designed to manage up to 800 Amperes of continuous current, making it an essential replacement part for heavy-duty industrial installations where downtime is not an option.

Detailed Technical Specifications

The 81001-450-52-R set is manufactured to the following technical engineering standards:

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 81001-450-52-R

• Device Type: Symmetrical Gate-Commutated Thyristor (SGCT) Matched Set

• Quantity per Kit: Packaged Set of Two (2) Matched Units

• Continuous Current Rating: 800 Amperes

• Application Category: Medium-Voltage Power Conversion

• Drive Compatibility: PowerFlex 7000 Series Drives

• Gate Control Voltage: 24 V DC (Stable supply required for gate-driver interface)

• Thermal Protection: Requires integrated heatsink mounting (internal drive installation)

• Isolation Grade: High-voltage galvanic isolation between gate and power terminals

• Operating Temperature: 0°C to +40°C (32°F to 104°F)

• Weight: 8.55 lbs (3.88 kg)

• Package Status: Sealed Surplus / New Service Kit