Fairchild FDB8443 Product Specifications

Summary

Fairchild FDB8443 N-Channel PowerTrench MOSFET datasheet for a 40V, 182A transistor with 3.0mohm on-resistance in TO-263 package. Features low Qg of 142nC, low Miller charge, UIS avalanche capability, and RoHS compliance. Applications include power tools, automotive engine control, motor drivers, electronic steering, and distributed power architectures. For power electronics design engineers.

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FD 8443 N -C hannel Pow er Trench SFET

June 2011

tm FDB8443

N-Channel Power Trench® MOSFET 40V, 182A, 3.0mΩ

Features Applications Typ r DS(on) = 2.3mΩ at VGS = 10V, ID = 80A Power Tools Typ Qg(10) = 142n C at VGS = 10V Automotive Engine Control Low Miller Charge Powertrain Management Low Qrr Body Diode Solenoid and Motor Drivers

UIS Capability (Single Pulse and Repetitive Pulse) Electronic Steering

Ro HS Compliant Integrated Starter / Alternator

Distributed Power Architecture and VRMs

FREE Primary Switch for 12V Systems

TA TIO

Page Summary Contents For Fairchild FDB8443 Product Specifications

Page 1 FD 8443 N -C hannel Pow er Trench SFET June 2011 tm FDB8443 N-Channel Power Trench® MOSFET 40V, 182A, 3.0mΩ Features Applications Typ r DS(on) = 2.3mΩ at VGS = 10V, ID = 80A Power Tools Typ Qg(10) = 1...

Page 2 FD 8443 N -C hannel Pow er Trench SFET MOSFET Maximum Ratings TC = 25°C unless otherwise noted Symbol Parameter Ratings Units VDSS Drain to Source Voltage VGS Gate to Source Voltage ±20 - Continuous (...

Page 3 FD 8443 N -C hannel Pow er Trench SFET Electrical Characteristics TC = 25o C unless otherwise noted Symbol Parameter Test Conditions Min Typ Max Units Switching Characteristics (VGS = 10V) ton Turn-On...

Page 4 FD 8443 N -C hannel Pow er Trench SFET LI ZE ER , P EA EN (A PO ER IS SI PA TI LI PL IE IM PE E, θJ , P EA EN (A Typical Characteristics VGS = 10V CURRENT LIMITED 0.4 BY PACKAGE TC, CASE TEMPERATURE(o...

Page 5 FD 8443 N -C hannel Pow er Trench SFET Typical Characteristics S( on IN , D IN EN (A , D AI UR EN (A -R ES IS TA (m 10us If R = 0 t AV = (L)(IAS)/(1.3*RATED BVDSS - VDD) If R ≠ 0 t AV = (L/R)ln[(IAS*R...

Page 6 FD 8443 N -C hannel Pow er Trench SFET Typical Characteristics LI ZE TE PA IT (p F) TH ES LD LT VGS = VDS ID = 250μA ID = 250μA TJ, JUNCTION TEMPERATURE(o C) TJ, JUNCTION TEMPERATURE (o C) Figure 11. ...

Page 7 FD 8443 N -C hannel Pow er Trench SFET TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and ...

Manual Details

Brand	Fairchild
Pages	7
File Size	300.14 KB
Published	June 17, 2026

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Frequently Asked Questions

What is the drain to source voltage rating of this MOSFET?

The drain to source voltage rating is 40V.

What are the typical applications for the FDB8443?

It is used in power tools, automotive engine control, powertrain management, solenoid and motor drivers, electronic steering, and 12V system primary switches.

What is the typical on resistance at Vgs=10V and Id=80A?

The typical drain to source on resistance is 2.3mΩ under these conditions.

Is the FDB8443 RoHS compliant?

Yes, the FDB8443 MOSFET is RoHS compliant.