T7H8166504DN

Overview

The Powerex T7H8166504DN is a Phase Control Silicon Controlled Rectifier (SCR) module rated for 750 Amperes average current and 1600 Volts repetitive peak reverse voltage. It features a hermetic Press-Pak Pow-R-Disc construction with an amplifying gate design. The device supports RMS on-state currents up to 1260 Amperes at a case temperature of 55°C, with a typical turn-off time of 150 microseconds and a maximum thermal resistance junction-to-case of 0.04 °C/W.

Feature Summary

• Hermetic packaging utilizing all-diffused Pow-R-Disc technology
• Amplifying gate structure for reliable triggering
• High surge current and I²t ratings
• Low on-state voltage characteristics

Applications

• Power Supplies
• Motor Control

Procurement Notes

Verify the complete twelve-digit part number against manufacturer documentation to ensure correct voltage and current specifications. Confirm mounting force requirements align with system hardware capabilities. Check for RoHS compliance status and specific revision dates on datasheets prior to ordering to avoid obsolete stock or specification mismatches.

Selection Notes

Select this component for high-power phase control applications requiring robust surge handling and hermetic sealing. Evaluate thermal management needs based on the specified junction-to-case thermal resistance and maximum allowable case temperatures under various conduction angles. Ensure gate drive circuits can supply the required trigger current and voltage levels.

Part Context

This module belongs to the T7H8 series of 750A Phase Control SCRs manufactured by Powerex Inc. The series utilizes field-proven amplifying gate technology within a Press-Pak hermetic package designed for industrial power electronics environments.

Replacement Considerations

Consult official Powerex documentation for direct substitutes. Verify that any alternative SCR matches the 750A average current, 1600V blocking voltage, and TO-200AC-style mechanical footprint.