Q4040K7TP

$9.31

Description：TRIAC ALTERNISTOR 400V 40A TO218
Series：-

SKU:bd89682e6e0d Category: TRIACs Brand: Littelfuse Inc.

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Product introduction

Q4040K7TP is listed in the Triacs range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is TRIAC ALTERNISTOR 400V 40A TO218. Review the specifications below when checking this part for your BOM.

Triacs specifications for Q4040K7TP

Description：TRIAC ALTERNISTOR 400V 40A TO218
Series：-
Mfr：Littelfuse Inc.
Package：Tube
Triac Type：Alternistor - Snubberless
Voltage - Off State：400 V
Current - On State (It (RMS)) (Max)：40 A
Voltage - Gate Trigger (Vgt) (Max)：2 V
Current - Non Rep. Surge 50, 60Hz (Itsm)：335A, 400A
Current - Gate Trigger (Igt) (Max)：100 mA
Current - Hold (Ih) (Max)：100 mA
Configuration：Single
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Through Hole
Package / Case：TO-218-3 Isolated Tab, TO-218AC
Supplier Device Package：TO-218 Isolated Tab

Triacs datasheet and documents for Q4040K7TP

Q4040K7TP

Triacs Overview

The Littelfuse Q4040K7TP is a bidirectional triac designed for AC power control applications. It features an RMS on-state current (It RMS) of 40 A and a rated repetitive off-state voltage (VDRM) of 400 V. The device supports non-repetitive on-state currents of 335 A and 400 A, with a maximum holding current (Ih) of 120 mA. Gate triggering requirements include a voltage (Vgt) of 2.5 V and a current (Igt) of 100 mA. On-state voltage is specified at 1.8 V, while leakage current in the off-state is limited to 20 uA. Operating temperatures range from -40 C to +125 C. The component utilizes a through-hole SMTO-218 package.

Triacs Feature Summary

Bidirectional switching capability for alternating current circuits
High thermal stability supporting operation up to 125 C
Robust construction with 40 A continuous current handling

Triacs Applications

AC motor speed control systems
Solid-state relay implementations
Lighting dimmer circuitry

Triacs Procurement Notes

Verify the specific Littelfuse datasheet for the Q4040K7TP to confirm RoHS compliance status and REACH SVHC declarations before integration. Ensure that the SMTO-218 through-hole mounting method aligns with the target PCB design constraints. Cross-reference the gate trigger specifications with the driving circuit capabilities to guarantee reliable turn-on under all operating conditions.

Triacs Selection Notes

Select this component when a 400 V blocking voltage and 40 A RMS current capacity are required for AC load management. The SMTO-218 package offers a balance between thermal dissipation and board space efficiency for through-hole designs. Verify that the 100 mA gate drive current is available from the control logic to ensure proper triggering without excessive power loss.

Triacs Part Context

This part belongs to the Qxx40xx series of thyristors manufactured by Littelfuse. The series provides standardized solutions for general-purpose AC power switching. The Q4040K7TP specifically addresses applications requiring moderate current handling with high voltage blocking capabilities in a robust leaded package format suitable for industrial environments.

Triacs Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic triacs with matching 40 A/400 V ratings may differ in gate sensitivity or thermal resistance. Do not assume pinout compatibility with other manufacturers' packages without explicit datasheet confirmation.

Triacs FAQ

What is the maximum non-repetitive on-state current for the Q4040K7TP?

The device supports non-repetitive on-state currents of 335 A and 400 A, depending on the specific pulse width and condition defined in the datasheet.