QJ4025LH5TP

Triacs Overview

The Littelfuse QJ4025LH5TP is a bidirectional triac designed for high-temperature applications, housed in an isolated TO-220AB package. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 25 A. The device maintains a low on-state voltage of 1.8 V and exhibits a maximum holding current of 50 mA. Gate triggering requires a voltage of 1.3 V and a current of 50 mA. Leakage current at VDRM is limited to 10 uA. The component operates within a temperature range of -40 C to +150 C and utilizes through-hole mounting.

Triacs Feature Summary

• Isolated construction suitable for high-voltage isolation requirements
• High-temperature capability extending operational limits to +150 C
• Bidirectional switching functionality for AC control circuits

Triacs Applications

• Industrial motor speed control systems
• Solid-state relay implementations
• High-temperature lighting dimming applications

Triacs Procurement Notes

Verify the specific suffix LH5TP against official Littelfuse documentation to confirm isolation and thermal ratings. Ensure the procurement channel provides valid RoHS compliance data. Confirm that the TO-220AB package matches the design footprint requirements before finalizing orders.

Triacs Selection Notes

Select this component when 400 V blocking voltage and 25 A continuous current are required in high-thermal environments. The isolated package distinguishes it from standard non-isolated triacs. Verify gate drive capabilities match the 50 mA trigger current specification for reliable switching performance.

Triacs Part Context

This part belongs to the QJxx25xHx series of Littelfuse thyristors. The series designation indicates a 25 A current rating with high-temperature variants. The QJ prefix typically denotes specific packaging and isolation characteristics within the manufacturer's broader triac portfolio.

Triacs Replacement Considerations

Direct substitutes include other 400 V, 25 A isolated triacs in TO-220 packages. Verify equivalent holding current and gate trigger specifications. Non-isolated equivalents like Q4025R5 require separate insulation planning.