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Littelfuse Inc. S4040NQRP

SCR 400V 40A TO263

Answer first: this page is a purchasing reference for the exact part number S4040NQRP from Littelfuse Inc.. Use it to start datasheet, package, manufacturer and RFQ verification; do not treat page text as a live stock, price or lead-time promise.

Manufacturer: Littelfuse Inc. Category: SCRs Part number: S4040NQRP Package: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB RFQ verification required

Key Parameters

Part NumberS4040NQRP
ManufacturerLittelfuse Inc.
CategorySCRs
packageTO-263-3, D2PAK (2 Leads + Tab), TO-263AB
series-
packagingTape & Reel (TR)
product statusActive
param 1400 V
param 21.5 V
param 340 mA
param 41.8 V
param 525 A
param 640 A
param 760 mA
param 810 µA
param 9430A, 520A
param 10Standard Recovery
param 11-40°C ~ 125°C
param 12-
param 13-
param 14Surface Mount
param 15TO-263 (D2PAK)

Parameters are provided for purchasing review. Confirm package, suffix, lifecycle status, datasheet revision and approved substitutes before ordering.

How to Verify S4040NQRP Before Ordering

Datasheet and parameter checks

  • Confirm the full manufacturer part number, not only a shortened search keyword.
  • Compare package, pinout, dimensions, voltage or rating fields, temperature range and compliance wording against the released BOM.
  • Use the manufacturer datasheet or drawing for electrical and mechanical limits before approving a substitute.

RFQ fields SENICO needs

  • Send exact part number, manufacturer, quantity, target delivery date, destination and required packaging.
  • State whether alternates are allowed, and list any date-code, certificate, traceability or customer AVL requirement.
  • Keep exact stock, factory lead time and proposed alternatives in separate quote lanes.

For S4040NQRP, SENICO recommends checking manufacturer marking, package, date code, requested quantity, approved vendor requirements and replacement risk before issuing a purchase order. If a supplier suggests an equivalent, record the changed fields and approval owner before comparing price.

We do not treat displayed data as a real-time stock or price commitment. The RFQ reply is the verified commercial reference.

Related buying guides: stock and lead-time verification, equivalent IC comparison, and BOM RFQ preparation.