Diodes Incorporated DMTH4004LK3Q-13

Overview

DMTH4004LK3Q-13 from Diodes Incorporated is a 40V, 100A N-channel enhancement-mode MOSFET in TO252 (DPAK) package, qualified to AEC-Q101 and rated for continuous operation at +175°C. It delivers 3 mΩ R_DS(ON) @ V_GS = 10V, 83 nC total gate charge, and supports 100% unclamped inductive switching-designed for engine-management systems and high-reliability automotive DC-DC converters.

For engineers reviewing the DMTH4004LK3Q-13 datasheet, DMTH4004LK3Q-13 pinout, DMTH4004LK3Q-13 application, or DMTH4004LK3Q-13 equivalent, key selection criteria include its AEC-Q101 qualification, low R_DS(ON) at 4.5V (5 mΩ), thermal robustness up to +175°C junction temperature, and TO252 package suitability for high-current PCB layouts with exposed drain pad.

Technical Context

This MOSFET employs a trench-gate silicon process optimized for low conduction and switching losses in automotive power stages. Its 0.8°C/W R_θJC enables high-power dissipation when mounted on thermally enhanced PCBs, and its 90 mJ E_AS rating ensures robustness against inductive energy during turn-off transients.

The device features a body diode with 48 ns reverse-recovery time and 72 nC Q_RR, supporting synchronous rectification in buck converters. Gate threshold voltage (1–3 V) and low 0.7 Ω gate resistance support fast, predictable switching with standard 3.3V/5V gate drivers.

Key Specifications

Pinout & Package

Package: TO252 (DPAK), surface-mount, with exposed drain pad for thermal and electrical connection to PCB copper pour.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel automotive MOSFET applications.

Compared with STL220N4F7AG and IPB180N04S4-02, the DMTH4004LK3Q-13 offers optimal balance of TO252 manufacturability, AEC-Q101 compliance, and 100A/3mΩ performance-making it preferred for cost-sensitive, volume automotive ECUs where DPAK assembly infrastructure is already established.

Availability

DMTH4004LK3Q-13 is available at Aetrix Electronics and suitable for engine-management systems, body control modules, and automotive DC-DC converters requiring stable component supply across extended temperature ranges and rigorous quality traceability.

Supply support for DMTH4004LK3Q-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, serving automotive, industrial, computing, and consumer markets with over 50 years of power device expertise.

The DMTH4004LK3Q belongs to Diodes' AEC-Q101-qualified automotive MOSFET product line, engineered specifically for high-temperature, high-reliability power switching in engine, chassis, and body electronics.

FAQ

What is the maximum continuous drain current at 100°C case temperature?

The DMTH4004LK3Q-13 sustains 100A continuous drain current at T_C = +100°C per the datasheet's Absolute Maximum Ratings table. This rating assumes proper PCB thermal design with ≥25 mm × 25 mm 2 oz copper on FR-4, and reflects derating from the 180W P_D limit at T_C = +25°C.

Is the body diode suitable for synchronous rectification in a 48V buck converter?

Yes-the body diode has 48 ns reverse-recovery time and 72 nC Q_RR at I_F = 50A and di/dt = 100 A/μs, enabling efficient synchronous operation in 48V-to-12V converters. Its low V_SD (0.7–1.2 V) further reduces conduction loss versus external Schottky diodes.

Does the TO252 package require solder paste stencil adjustments for the exposed drain pad?

Yes-the exposed drain pad must be printed with ≥80% solder paste coverage and ≥5× thermal vias (0.3mm diameter, 0.8mm pitch) connecting to inner-layer copper planes. Diodes recommends a 5.33 mm × 5.21 mm pad per the DPAK outline drawing to ensure mechanical reliability and thermal performance.

How does the 175°C rating impact layout in an under-hood ECU?

The +175°C T_J max allows operation with junction temperatures up to that limit, but PCB layout must maintain T_C ≤ +125°C via thermal vias and copper pours. Ambient derating curves in Figure 5 show R_DS(ON) increases only 1.8× from 25°C to 175°C at V_GS = 10V-preserving efficiency in high-temp environments.