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Fairchild Semiconductor FDU8778

MOSFET N-CH 25V 35A IPAK

Answer first: this page is a purchasing reference for the exact part number FDU8778 from Fairchild Semiconductor. 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: Fairchild Semiconductor Part number: FDU8778 Package: TO-251-3 Short Leads, IPAK, TO-251AA RFQ verification required

Key Parameters

Part NumberFDU8778
ManufacturerFairchild Semiconductor
CategoryFETs, MOSFETs
packageTO-251-3 Short Leads, IPAK, TO-251AA
seriesPowerTrench®
packagingTube
product statusObsolete
param 1N-Channel
param 2MOSFET (Metal Oxide)
param 325 V
param 435A (Tc)
param 54.5V, 10V
param 614mOhm @ 35A, 10V
param 72.5V @ 250µA
param 818 nC @ 10 V
param 9±20V
param 10845 pF @ 13 V
param 11-
param 1239W (Tc)
param 13-55°C ~ 175°C (TJ)
param 14-
param 15-
param 16Through Hole
param 17IPAK

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

How to Verify FDU8778 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 FDU8778, 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.