T107M1

Overview

The Littelfuse T107M1 is a sensitive gate silicon-controlled rectifier (SCR) designed for half-wave unidirectional switching applications. It features a TO-202 package with an average on-state current rating of 4 A and a repetitive peak off-state voltage of 600 V. The device requires a maximum DC gate trigger current of 500 µA and has a peak on-state voltage of 2.5 V. It supports a non-repetitive surge current of 50 A at 60 Hz and operates within a junction temperature range of -40 °C to +110 °C.

Feature Summary

• Sensitive gate architecture enabling direct interfacing with low-current control circuits
• Glass-passivated junction construction for enhanced reliability and parameter stability
• Electrically isolated tab configuration in the TO-202 package

Applications

• Strobe light triggering circuits
• Fluid level sensing systems
• Capacitive-discharge ignition systems

Procurement Notes

Verify the specific suffix 'M1' corresponds to the 600 V rating and 500 µA gate sensitivity during procurement. Confirm that the TO-202 lead form matches the required PCB footprint, as variations exist. Ensure compliance with RoHS standards if applicable to the assembly process.

Selection Notes

Select this component when a 600 V blocking capability and 4 A continuous current are required. The sensitive gate characteristic allows for lower drive power compared to standard SCRs. Verify thermal management requirements against the specified case temperature limits for the intended RMS current load.

Part Context

This part belongs to the Teccor line of sensitive SCRs, which complements the manufacturer's power SCR portfolio. The series covers ratings from 0.8 A to 10 A with voltages up to 600 V. The T107M1 specifically utilizes the TO-202 package variant within this family.

Replacement Considerations

T107D1 offers identical electrical characteristics but with a 400 V rating. T107B1 provides the same package and current handling with a 200 V rating.