Allen-Bradley 81001-449-05-R SGCT Power Semiconductor Module

Allen-Bradley 81001-449-05-R is a SGCT integrated gate commutated thyristor power semiconductor module, belonging to Rockwell medium voltage drive spare parts series. It serves as the core power switching component for medium voltage variable frequency drives, controlling high-power current switching for motor speed regulation.

This power module features high surge current capability and low switching loss, with matched electrical characteristics for parallel connection. It is widely used in heavy industry medium voltage drive cabinet maintenance, spare replacement and power drive system retrofit projects.

Data Parameters

• 1. Brand: Allen-Bradley (Rockwell Automation).

• 2. Model: 81001-449-05-R.

• 3. Product Type: SGCT Integrated Gate Commutated Thyristor Module.

• 4. Application: Medium voltage variable frequency drive power stage.

• 5. Feature: Matched pair SGCT for parallel high-current operation.

• 6. Characteristic: High surge withstand, low switching loss.

• 7. Cooling: Liquid / air cooling compatible design.

• 8. Package: High-power press-pack semiconductor package.

• 9. Mounting: Installed inside medium voltage drive power cabinet.

• 10. Operating Temperature: -40℃ ~ +125℃.

Core Functions

• 1. Act as high-power power switching device inside medium voltage VFD, control turn-on and turn-off of main circuit current.

• 2. Realize AC-DC-AC power conversion, adjust output frequency and voltage to control the speed of large medium-voltage motors.

• 3. Matched electrical parameters ensure current sharing when multiple SGCT modules work in parallel for high power load.

• 4. Withstand large short-circuit surge current, provide reliable protection under transient fault conditions of drive system.

• 5. Cooperate with gate drive board and snubber circuit to guarantee stable operation of medium voltage frequency converter.

Application Scenarios

• 1. Power plant medium voltage large motor VFD cabinet SGCT module spare replacement.

• 2. Mining, cement and metallurgy medium voltage drive system maintenance and upgrade project.

• 3. Petrochemical refinery large pump and compressor medium voltage frequency converter renewal.

• 4. Heavy industry high-power medium voltage drive spare inventory backup.

• 5. Aging Rockwell medium voltage drive SGCT semiconductor module replacement project.

FAQ

• 1. Q: What is Allen-Bradley 81001-449-05-R?
      A: It is Rockwell Allen-Bradley SGCT high-power thyristor module, the core power component of medium voltage variable frequency drives for large motors.

• 2. Q: What is SGCT?
      A: SGCT stands for Integrated Gate Commutated Thyristor, high voltage high power semiconductor device used for medium voltage drives.

• 3. Q: Can it be hot swapped?
      A: Must fully discharge DC bus voltage and isolate all power supply before replacement; live replacement is strictly prohibited.