S4040NQ3TP

$1.80

Description：SCR 400V 40A TO263
Series：-

SKU:499418239ede 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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S4040NQ3TP

Overview

The S4040NQ3TP is a Silicon Controlled Rectifier (SCR) manufactured by Littelfuse under the Teccor brand. It features a rated repetitive off-state voltage of 400 V and an RMS on-state current capacity of 40 A. The device operates within a junction temperature range of -40°C to +125°C. Key electrical parameters include a maximum gate trigger voltage of 1.5 V, a gate trigger current of 40 mA, and a forward voltage drop of 1.8 V at rated current. The non-repetitive peak on-state current is specified at 520 A. It utilizes an SMTO-263-2 surface-mount package.

Feature Summary

Surface-mount construction for automated PCB assembly
High surge current handling capability
Glass-passivated junctions for parameter stability

Applications

AC power control circuits
Phase control applications
Lighting dimmer systems

Procurement Notes

Verify the specific suffix 'Q3TP' against the official Littelfuse datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements for the target market. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.

Selection Notes

Select this component when a 40 A RMS SCR is required in a surface-mount form factor. The 400 V rating suits low-voltage AC mains applications. Verify that the gate drive circuit can supply at least 40 mA to ensure reliable triggering. Confirm thermal management capabilities support the 125°C maximum junction temperature limit during operation.

Part Context

This device belongs to the Sxx40x series of Thyristors from Littelfuse. It shares the 40 A current rating with other variants like the S4040NRP but differs in packaging and termination style. The S4040NQ3TP is designed for high-volume surface-mount production environments requiring robust power switching components.

Replacement Considerations

The S4040NRP is a similar 40A 400V SCR from the same manufacturer. Verify pinout compatibility and thermal resistance differences between the SMTO-263-2 package and any alternative packages before substitution.

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.