T106B1

Overview

The Littelfuse T106B1 is a half-wave unidirectional, gate-controlled silicon rectifier (SCR) from the Teccor line of sensitive SCRs. It utilizes a non-isolated TO-202 package with long leads and features glass-passivated junctions for parameter stability. The device supports an average on-state current of 2.5 A and an RMS on-state current of 4 A at a case temperature of 25 °C. It offers a repetitive peak off-state voltage rating of 200 V. Key electrical characteristics include a maximum DC gate trigger current of 200 µA, a maximum peak on-state voltage of 2.2 V, and a maximum holding current of 5 mA. The component operates within a junction temperature range of -40 °C to +110 °C.

Feature Summary

• Sensitive gate architecture enabling reliable triggering with low gate currents
• Glass-passivated junction construction providing protection against contamination and ensuring long-term reliability
• Non-isolated TO-202 leaded package designed for through-hole mounting

Applications

• General purpose AC/DC power supply circuits
• Solid-state relay driver stages
• Phase control applications for lighting or motor speed regulation

Procurement Notes

Verify the specific revision status of the component before procurement, as older manufacturing runs may differ in packaging or marking conventions. Confirm that the required thermal management aligns with the specified case temperature ratings for the intended RMS current load. Ensure the ordering suffix matches the desired standard bulk or tube packaging configuration if applicable.

Selection Notes

Select this component when a sensitive gate SCR is required for low-power phase control or switching tasks. The 200 V voltage rating limits its use to lower voltage AC lines compared to higher-rated variants like the T106D1. Consider the thermal resistance of the TO-202 package and ensure adequate heat sinking if operating near the maximum rated currents to maintain junction temperatures within safe limits.

Part Context

The T106B1 belongs to the Teccor Sensitive SCRs family, which covers ratings from 0.8 A to 10 A and voltages from 200 V to 600 V. This series complements Littelfuse's power SCR lineup by offering devices optimized for precise gate control. The T106B1 specifically represents the 200 V variant within the 4 A RMS current class, sharing the same physical footprint as other members of the T106/T107 series.

Replacement Considerations

T106D1: Offers identical current ratings but with a 400 V blocking voltage. T106M1: Provides 600 V blocking capability with the same current specifications. T107B1: Features a higher gate sensitivity (500 µA IGT) while maintaining the 200 V rating.