IRKH142/12

Overview

The IRKH142/12 is a dual low-scatter Silicon Controlled Rectifier (SCR) module manufactured by Vishay General Semiconductor. It features an internal series connection of two SCRs and one diode, housed in the INTAPAK package. The device has a maximum repetitive peak reverse voltage of 1200V and a non-repetitive surge current capacity of 4712A at 60Hz. It operates with a gate trigger current of 35mA and maintains a holding current maximum of 200mA. The junction temperature range extends up to 150°C.

Feature Summary

• Dual SCR configuration with integrated series diode for high-voltage applications
• Low scatter design ensuring consistent electrical characteristics across units
• Robust surge current handling capability suitable for industrial power systems

Applications

• Industrial motor drives and control circuits
• High-power AC switching applications
• Inverter bridge rectifier configurations

Procurement Notes

Verify the specific suffix designation against the manufacturer's official datasheet to confirm exact electrical tolerances and pinout compatibility. Ensure that the INTAPAK mounting interface requirements are met by the application hardware. Confirm that the thermal management system supports the specified junction temperature limits under full load conditions.

Selection Notes

Select this component when a compact solution for high-voltage DC or AC switching is required. The dual SCR structure simplifies circuit design for phase control applications. Consider the 1200V rating for mains-connected systems. Evaluate the thermal resistance of the INTAPAK package relative to the expected average on-state current to ensure reliable operation without excessive heating.

Part Context

This part belongs to Vishay's IRKH series of high-power thyristor modules. These modules are designed for demanding industrial environments where reliability and high surge capacity are critical. The INTAPAK packaging offers efficient heat dissipation and secure mechanical mounting for large-scale power electronics assemblies.

Replacement Considerations

Direct substitutes include other Vishay IRKH series modules with matching voltage and current ratings, such as the IRKH142/10A or IRKH142/14A, provided the package and pinout remain compatible. Cross-manufacturer replacements require careful verification of the internal SCR-diode topology and thermal characteristics.