T106B11

Overview

The Littelfuse T106B11 is a half-wave unidirectional, gate-controlled silicon-controlled rectifier (SCR) designed for sensitive gate applications. It features a TO-202 long lead package with through-hole mounting. The device supports a maximum repetitive peak off-state voltage of 200 V and an RMS on-state current rating of 4 A at a case temperature of 25 °C. Key electrical parameters 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 and utilizes glass-passivated junctions for reliability.

Feature Summary

• Sensitive gate architecture enabling direct interfacing with low-current control circuits
• Glass-passivated junction construction providing durability against contamination
• Through-hole TO-202 package configuration suitable for standard PCB assembly

Applications

• Strobe light triggering circuits
• Fluid level sensing systems
• Capacitive-discharge ignition systems
• Solenoid control in ground fault circuit interrupters

Procurement Notes

Verify the specific ordering suffix '1' against manufacturer documentation to confirm lead frame or plating variations. Confirm RoHS compliance status as the base product line may have different environmental declarations. Check for obsolescence notices since this series has been subject to discontinuation updates. Ensure the supplier provides valid traceability for the Littelfuse Teccor brand origin.

Selection Notes

Select this component when a 200 V blocking capability and 4 A RMS current handling are required in a TO-202 form factor. The sensitive gate specification allows for lower drive power compared to standard SCRs. Verify that the application's dv/dt requirements fall within the specified limits to prevent false triggering. Consider thermal derating curves if the operating case temperature exceeds 25 °C.

Part Context

This part belongs to the Littelfuse Teccor Sensitive SCR family, covering ratings from 0.8 A to 10 A. The T106 series specifically denotes the 4 A current rating with a 200 V voltage class. The '1' suffix typically indicates a specific mechanical or packaging variation within the standard T106B1 designation, often related to lead forming or plating specifications defined by the manufacturer.

Replacement Considerations

T106B1 is the primary equivalent part number within the same series. Verify that any substitute maintains the 200 V rating and 4 A RMS current capacity. Ensure the replacement device also offers sensitive gate characteristics if low trigger current is critical for the design.