QJ4008VH4TP

Triacs Overview

The QJ4008VH4TP is a TRIAC Alternistor from Littelfuse Inc., designed for AC switching and phase control applications. It features a peak repetitive off-state voltage of 400 V and an on-state current rating of 8 A. The device is housed in a TO-251AA (TO-251) through-hole package with three pins. Key electrical specifications include a peak non-repetitive surge current of 70 A, a gate trigger current of 35 mA, and a typical on-state voltage of 1.3 V. This component is part of the low-power TRIAC series up to 1200V, optimized for high-temperature operation.

Triacs Feature Summary

• Snubberless design capability for simplified circuit implementation
• High temperature operation suitable for demanding environments
• Alternistor technology combining TRIAC and diode characteristics

Triacs Applications

• Motor speed control systems
• AC phase control circuits
• General AC switching applications

Triacs Procurement Notes

Verify the specific voltage rating variant, as sources indicate conflicting data between 400 V and 600 V ratings for this part number. Confirm RoHS3 compliance status and ensure the TO-251AA package matches the mechanical requirements of the target assembly before finalizing procurement orders.

Triacs Selection Notes

Select this component for applications requiring robust AC phase control with snubberless operation. Ensure the 400 V or 600 V rating aligns with the system's peak line voltage. Consider the 8 A continuous current and 70 A surge capacity when sizing for motor loads or inductive switching scenarios.

Triacs Part Context

This part belongs to Littelfuse's low-power TRIAC series, which includes variants up to 1200V. The QJxx04xx series typically denotes 4 A devices, while this specific model represents an 8 A variant within the same high-temperature Alternistor family, offering enhanced current handling capabilities compared to lower-rated siblings.

Triacs Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by matching voltage, current, and package specifications if cross-referencing with other TRIAC models.