SJ4012R1TP

Overview

The Littelfuse SJ4012R1TP is a standard recovery silicon controlled rectifier (SCR) designed for high-temperature operation. It features a TO-220AB through-hole package and supports a maximum junction temperature of 150°C. The device provides a repetitive peak off-state voltage of 600V and an RMS on-state current rating of 12A. It exhibits a non-repetitive surge current capability of up to 120A at 60Hz for half-cycle durations. The component ensures reliable switching performance with a holding current of 6mA and a gate trigger current of 15mA, suitable for demanding power control applications.

Feature Summary

• High junction temperature capability up to 150°C for robust thermal performance
• Standard recovery characteristics optimized for general power switching
• Through-hole mounting configuration in a TO-220AB package

Applications

• Capacitive discharge systems for strobe lights
• Nailer and stapler power controls
• Gas engine ignition circuits

Procurement Notes

Verify the specific suffix 'TP' against the manufacturer's official datasheet to confirm packaging details and compliance status. Ensure that the 600V voltage rating and 12A current specifications align with the circuit requirements. Cross-reference the TO-220AB pinout with the design schematic to prevent installation errors. Confirm RoHS compliance documentation is available for regulatory adherence.

Selection Notes

Select this component when a standard recovery SCR with high thermal tolerance is required. The 600V blocking voltage suits medium-voltage AC applications. The 12A RMS rating allows for moderate load handling. Consider the through-hole package for mechanical stability in industrial environments where surface-mount options are unsuitable.

Part Context

This part belongs to the SJxx12xx series of thyristors from Littelfuse. The series is characterized by its ability to operate at elevated temperatures and its suitability for rugged industrial applications. It complements other devices in the family that may offer different voltage or current ratings while maintaining similar thermal and structural properties.

Replacement Considerations

Direct substitutes within the same series include parts with matching voltage and current ratings but potentially different suffixes indicating package variations. Verify electrical parameters such as VDRM and IT(RMS) before substitution. Ensure the replacement maintains the same recovery type and thermal characteristics.