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Littelfuse Inc. Q4040K7TP

TRIAC ALTERNISTOR 400V 40A TO218

Answer first: this page is a purchasing reference for the exact part number Q4040K7TP 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. Part number: Q4040K7TP Package: TO-218-3 Isolated Tab, TO-218AC RFQ verification required

Key Parameters

Part NumberQ4040K7TP
ManufacturerLittelfuse Inc.
CategoryTRIACs
packageTO-218-3 Isolated Tab, TO-218AC
series-
packagingTube
product statusActive
param 1Alternistor - Snubberless
param 2400 V
param 340 A
param 42 V
param 5335A, 400A
param 6100 mA
param 7100 mA
param 8Single
param 9-40°C ~ 125°C (TJ)
param 10-
param 11-
param 12Through Hole
param 13TO-218 Isolated Tab

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

How to Verify Q4040K7TP 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 Q4040K7TP, 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.