QJ8040K4TP

$8.64

Description：TRIAC 800V 40A TO218AC
Series：QJxx40xx

SKU:fa7e931d6361 Category: TRIACs Brand: Littelfuse Inc.

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Product introduction

QJ8040K4TP is listed in the Triacs range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is TRIAC 800V 40A TO218AC. Review the specifications below when checking this part for your BOM.

Triacs specifications for QJ8040K4TP

Description：TRIAC 800V 40A TO218AC
Series：QJxx40xx
Mfr：Littelfuse Inc.
Package：Tube
Triac Type：Standard
Voltage - Off State：800 V
Current - On State (It (RMS)) (Max)：40 A
Voltage - Gate Trigger (Vgt) (Max)：1.3 V
Current - Non Rep. Surge 50, 60Hz (Itsm)：420A, 500A
Current - Gate Trigger (Igt) (Max)：50 mA
Current - Hold (Ih) (Max)：80 mA
Configuration：Single
Operating Temperature：-40°C ~ 150°C (TJ)
Mounting Type：Through Hole
Package / Case：TO-218-3 Isolated Tab, TO-218AC
Supplier Device Package：TO-218AC Isolated
Grade：-
Qualification：-

Triacs datasheet and documents for QJ8040K4TP

QJ8040K4TP

Triacs Overview

The Littelfuse QJ8040K4TP is a bidirectional triac designed for AC switching and phase control applications. It features an RMS on-state current of 40 A and a rated repetitive off-state voltage of 800 V. The device operates within a temperature range of -40°C to +150°C and utilizes an SMTO-218 through-hole package. Key electrical parameters include a maximum holding current of 80 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 100 mA. It exhibits an on-state voltage of 1.6 V and a non-repetitive peak on-state current of 500 A.

Triacs Feature Summary

Bidirectional AC switching capability with integrated gate control for either polarity of main terminal voltage.
Glass-passivated junctions ensure long-term device reliability and parameter stability under harsh conditions.
Robust thermal performance supporting operation up to +150°C in high-power industrial environments.

Triacs Applications

AC speed controls for motors
Temperature modulation controls
Lighting controls requiring noise immunity

Triacs Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout and packaging details. Ensure compliance with RoHS and REACH requirements by checking the latest regulatory documentation provided by Littelfuse before finalizing procurement specifications.

Triacs Selection Notes

Select this component when designing circuits requiring 40 A continuous current handling at 800 V blocking voltage. Verify that the gate drive circuit can supply at least 100 mA to ensure reliable triggering. Confirm that the system's thermal management can dissipate heat generated by the 1.6 V on-state voltage drop during conduction periods.

Triacs Part Context

This part belongs to the QJxx40xx series of Triacs manufactured by Littelfuse. It is categorized under Thyristors and specifically designed for power control applications. The device is distinct from Quadrac devices as it does not include an internal diac trigger.

Triacs Replacement Considerations

Consult Littelfuse technical support for verified substitute part numbers. Do not assume cross-compatibility with other manufacturers' 40 A triacs without verifying pinout, voltage ratings, and thermal characteristics.