TIC108D-S

Scrs Overview

The Bourns TIC108D-S is a silicon controlled rectifier (SCR) from the obsolete TIC108 series, housed in a TO-220 package. It features a glass-passivated wafer and offers a repetitive peak off-state voltage of 400 V. The device supports a continuous on-state current of 5 A and an average on-state current of 3.2 A at 180° conduction angle. Key electrical characteristics include a maximum gate trigger current of 1 mA and a holding current ranging from 2 to 15 mA depending on temperature. Thermal resistance from junction to case is 3.5 °C/W, with an operating case temperature range of -40°C to +110°C.

Scrs Feature Summary

• Glass passivation provides protection against mechanical stress and moisture ingress for enhanced reliability.

Scrs Applications

• Phase control circuits
• Lighting dimmers
• Motor speed controls

Scrs Procurement Notes

This component is officially marked as obsolete by the manufacturer and is not recommended for new designs. Verification of availability should focus on surplus or secondary market sources rather than standard distribution channels. Designers must confirm end-of-life status and plan for long-term supply constraints if used in existing equipment maintenance.

Scrs Selection Notes

Selection requires evaluating the 400 V blocking voltage against system peak reverse voltages. The 5 A continuous current rating dictates thermal management requirements, particularly regarding derating above 80°C case temperature. Verify that the gate trigger parameters align with the driving circuit capabilities, noting the specific test conditions for IGT and VGT.

Scrs Part Context

The TIC108D-S belongs to the broader TIC108 series of silicon controlled rectifiers manufactured by Bourns Inc. This series includes variants with different voltage ratings, such as the TIC108M (600 V), TIC108S (700 V), and TIC108N (800 V). All share similar current handling capabilities and packaging styles within the same product family lineage.

Scrs Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the series is obsolete, equivalent replacements must be sourced through independent cross-reference tools or manufacturer recommendations for modern equivalents.

Scrs FAQ

What is the maximum gate trigger current for the TIC108D-S?

The maximum gate trigger current (IGT) is 1 mA, measured under conditions of VAA = 12 V, RL = 100 Ω, and tp(g) ≥ 20 µs.

How does the holding current vary with temperature?

The holding current ranges from 3.5 mA to 15 mA at -40°C and from 2 mA to 10 mA at room temperature, measured with VAA = 12 V and initiating IT = 20 mA.

Is the TIC108D-S suitable for new designs?

No, the datasheet explicitly states that this series is obsolete and not recommended for new designs.