IRKH71/12A

SCRs - Modules Overview

The IRKH71/12A is a Silicon Controlled Rectifier (SCR) manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum repetitive peak off-state voltage of 1200 V and a maximum RMS on-state current of 109.9 A. The device is housed in an isolated TO-240AA flange mount package with five terminals. It includes a built-in series diode configuration within a single element structure.

SCRs - Modules Feature Summary

• Integrated built-in series diode for combined rectification and control functions
• Electrically isolated flange mount construction for efficient thermal management
• High-voltage capability suitable for demanding power switching applications

SCRs - Modules Applications

• Industrial motor drives
• High voltage power supplies
• Welding equipment

SCRs - Modules Procurement Notes

Verify the specific suffix 'A' against official Vishay documentation to confirm if it denotes a distinct revision or variant compared to the base IRKH71/12 model. Ensure the procurement source provides the original datasheet to validate terminal pinouts and exact electrical tolerances, as distributor listings may lack detailed revision history.

SCRs - Modules Selection Notes

Select this component when a high-current SCR with integrated rectification is required in a TO-240AA form factor. The 1200 V rating supports medium-voltage AC systems. Verify that the gate trigger current requirements align with the driving circuit capabilities and that the flange mounting style fits the mechanical constraints of the heat sink assembly.

SCRs - Modules Part Context

This part belongs to the IRKH series of silicon controlled rectifiers from Vishay. These devices are designed for general purpose phase control and rectification in industrial environments. The series typically offers robust surge current handling and reliable operation under high thermal stress conditions common in power electronics.

SCRs - Modules Replacement Considerations

Cross-reference with Vishay IRKH71/12 for functional equivalence. Check International Rectifier IRKJ71/14A for higher voltage ratings but different current characteristics. Confirm pin compatibility and thermal resistance values before substituting.