Q4008VH4TP

Triacs Overview

The Littelfuse Q4008VH4TP is a Triac component from the Teccor brand, designed for AC switching and phase control applications. It features an RMS on-state current of 8 A and a rated repetitive off-state voltage (VDRM) of 400 V. The device operates within a temperature range of -40°C to +125°C and utilizes a TO-220-2 package for through-hole mounting. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger voltage of 2.5 V, and a gate trigger current ranging from 25 mA to 50 mA. The on-state voltage is specified at 1.6 V, with non-repetitive peak currents of 83 A and 100 A.

Triacs Feature Summary

• Sensitive gate control capability ensuring reliable triggering in Quadrants I and IV for digital circuitry compatibility
• Integrated thermal protection mechanisms to enhance device reliability under transient overcurrent conditions
• High commutation performance suitable for demanding AC load switching environments

Triacs Applications

• Motor speed modulation controls
• Temperature regulation systems
• Lighting dimming circuits
• Static switching relays

Triacs Procurement Notes

Verify the specific suffix 'VH' against official Littelfuse documentation to confirm exact electrical tolerances and pinout configurations. Ensure the ordering part number matches the required package style and compliance standards such as UL recognition before finalizing procurement orders.

Triacs Selection Notes

Select this component for AC phase control designs requiring 8 A continuous current handling at 400 V blocking voltage. Consider the sensitive gate type if interfacing directly with low-power digital logic without additional amplification stages. Verify thermal management requirements for the TO-220-2 package based on the expected ambient operating temperature.

Triacs Part Context

This Triac belongs to the Qxx08xx series, which includes standard and Alternistor types. The Q4008VH4TP variant specifically addresses applications needing robust AC switching with integrated safety features. It complements other Teccor thyristors by offering high dv/dt immunity and reliable operation in industrial power control modules.

Triacs Replacement Considerations

Consult Littelfuse datasheets for direct cross-reference equivalents within the Qxx08xx family. Verify that any substitute maintains the same 8 A RMS rating, 400 V voltage class, and TO-220-2 footprint to ensure mechanical and electrical compatibility.