S4040NQ2TP

$1.83

Description：SCR 400V 40A TO263
Series：-

SKU:8096f4f648e2 Category: SCRs Brand: Littelfuse Inc.

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Product introduction

Product Detailed Parameters

Description：SCR 400V 40A TO263
Series：-
Mfr：Littelfuse Inc.
Package：Tube
Voltage - Off State：400 V
Voltage - Gate Trigger (Vgt) (Max)：1.5 V
Current - Gate Trigger (Igt) (Max)：40 mA
Current - Hold (Ih) (Max)：60 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)：430A, 520A
SCR Type：Standard Recovery
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Supplier Device Package：TO-263 (D2PAK)
Voltage - On State (Vtm) (Max)：1.8 V
Current - On State (It (AV)) (Max)：25 A
Current - On State (It (RMS)) (Max)：40 A
Current - Off State (Max)：10 µA

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S4040NQ2TP

Overview

The Littelfuse S4040NQ2TP is a standard recovery silicon controlled rectifier (SCR) with a 400V repetitive peak off-state voltage rating. It supports an average on-state current of 25A and an RMS on-state current of 40A. The device features a non-repetitive surge current capability of up to 520A at 60Hz. Operating temperature range extends from -40°C to +125°C, with a junction temperature rating of +150°C. The component utilizes a glass-passivated junction for enhanced reliability.

Feature Summary

Fast turn-off time characteristics suitable for power control applications
Glass-passivated junction construction for improved stability
High surge current handling capability for robust circuit protection

Applications

AC switching circuits
Phase control systems
Motor speed modulation
Temperature modulation controllers

Procurement Notes

Verify the specific suffix 'Q2TP' against official Littelfuse documentation to confirm package type and lead-free compliance status. Ensure the selected variant matches the required thermal management specifications for the intended operating environment. Cross-reference the datasheet revision date to guarantee access to the most current electrical parameters and mechanical drawings before finalizing procurement orders.

Selection Notes

Select this component when designing AC phase control or motor speed regulation circuits requiring a 400V blocking voltage. The 25A average current rating suits moderate power loads, while the 520A surge capacity provides resilience against transient inrush currents. Consider the TO-220 or TO-263 package options based on available board space and heat dissipation requirements for the specific application layout.

Part Context

This part belongs to the S4040xQx series of low-power SCRs designed for general-purpose power control. The series offers voltage ratings up to 1200V, with the S4040NQ2TP specifically addressing 400V applications. These devices are engineered for compact designs where fast turn-off times and reliable switching performance are critical for efficient energy management in industrial and consumer electronics.

Replacement Considerations

Compatible substitutes within the same Littelfuse family include the S4040RQ2TP, which shares similar electrical characteristics and package options. Verify that any alternative part number maintains the required 400V rating and 25A/40A current specifications to ensure functional equivalence in existing circuit designs without modification.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.