Diodes Incorporated DM5W11AQ-13

Overview

DM5W11AQ-13 from Diodes Incorporated is a 3600W surface-mount transient voltage suppressor (TVS) diode designed for automotive power-line surge protection. It features a 11V reverse standoff voltage (VRWM), 12.2–13.5V breakdown voltage (VBR), and clamps transients to ≤18.2V at 198A peak pulse current (10/1000µs), meeting ISO16750-2 Pulse A/B and ISO7637-2 Pulse 1/2a/3a/3b requirements in engine control units and body electronics.

For engineers reviewing the DM5W11AQ-13 datasheet, DM5W11AQ-13 pinout, DM5W11AQ-13 application, or DM5W11AQ-13 equivalent, this device delivers validated AEC-Q101 qualification, DO-218 package thermal performance (RθJC = 1.1°C/W), and low-leakage operation (<10µA @ VRWM) critical for 12V/24V automotive systems with high ambient temperature tolerance (–55°C to +175°C).

Technical Context

This unidirectional TVS diode operates as a clamping device across DC power rails, conducting only during overvoltage events above its breakdown threshold. Its DO-218 (Type E) package integrates a heatsink-connected anode for efficient thermal dissipation during 3600W peak pulse events, with junction-to-case thermal resistance of 1.1°C/W enabling sustained operation under load dump conditions per ISO16750-2.

The device exhibits low reverse leakage (<10µA @ VRWM = 11V, TA = +25°C) and stable clamping behavior up to +175°C junction temperature. Its 10/1000µs waveform rating (198A IPP) and 500A IFSM capability support robust protection against repetitive surges and single-event load dumps without degradation.

Key Specifications

Pinout & Package

Package: DO-218 (Type E), surface-mount molded plastic housing with heatsink-integrated anode terminal. Polarity marked by cathode bar; heatsink tab serves as anode connection point.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Compared with SMAJ11A and SMCJ11A, DM5W11AQ-13 uniquely combines 3600W surge capacity, DO-218 thermal performance, and full PPAP support-enabling single-device compliance with OEM-level load dump and long-term under-hood reliability requirements.

Availability

DM5W11AQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering units requiring stable component supply across multi-year automotive production cycles.

Supply support for DM5W11AQ-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, specializing in high-reliability components for automotive, industrial, and computing markets with IATF 16949-certified fabrication and assembly facilities.

The DM5WxxAQ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for ISO16750-2/ISO7637-2-compliant power rail protection in harsh-environment electronic control units.

FAQ

What is the maximum clamping voltage of DM5W11AQ-13 at its rated peak pulse current?

The DM5W11AQ-13 clamps to a maximum of 18.2V at 198A peak pulse current (10/1000µs waveform), as specified in the Electrical Characteristics table. This value is measured under standardized test conditions with controlled current rise time and pulse duration, and remains valid across its full operating temperature range (–55°C to +175°C).

How does the DO-218 package improve thermal performance compared to standard SMB or SMC packages?

The DO-218 (Type E) package uses a heatsink-integrated anode tab that reduces junction-to-case thermal resistance to 1.1°C/W-over 2× better than SMC (2.5°C/W) and 45× better than SMA (50°C/W). This allows the DM5W11AQ-13 to sustain higher average power during repetitive surges and maintain clamping stability at elevated ambient temperatures.

Is DM5W11AQ-13 suitable for 24V commercial vehicle applications?

Yes-its 11V VRWM and 18.2V clamping voltage provide appropriate margin for 24V nominal systems when used with upstream voltage regulation. The device's 175°C maximum junction temperature and AEC-Q101 qualification make it suitable for heavy-duty truck ECUs and construction equipment controllers where ambient temperatures exceed 125°C.

Does DM5W11AQ-13 require external heat sinking beyond PCB copper pour?

No additional heat sink is required if the anode tab is soldered to ≥250mm² of 2oz copper on the PCB. The DO-218 package's thermal design relies on direct conduction through the heatsink tab into the board; adding external metal heatsinks provides diminishing returns due to the already low RθJC of 1.1°C/W and dominant RθCA limitation.