Diodes Incorporated DM8W27Q-13

Overview

DM8W27Q-13 from Diodes Incorporated is a 6600W surface-mount transient voltage suppressor (TVS) diode designed for automotive power-line surge protection. It features a 22V reverse standoff voltage, 40V maximum clamping voltage at 75A peak pulse current, and AEC-Q101 qualification for under-hood applications. Its DO-218 package supports high-power load dump and ISO 7637-2/16750-2 compliant surge suppression in 12V/24V vehicle electrical systems.

For engineers reviewing the DM8W27Q-13 datasheet, DM8W27Q-13 pinout, DM8W27Q-13 application, or DM8W27Q-13 equivalent, key selection criteria include peak pulse power (6600W), clamping performance (VC = 40V @ IPP = 75A), thermal resistance (RθJC = 0.90°C/W), AEC-Q101 qualification, and DO-218 mechanical compatibility with high-current PCB layouts.

Technical Context

The DM8W27Q-13 is a unidirectional TVS diode optimized for automotive load dump and switching surge suppression. Its glass-passivated junction delivers low leakage (<1µA @ VRWM) and stable breakdown (24–30V) across -55°C to +175°C operating range, with Zener voltage temperature coefficient of 36mV/°C.

It handles 700A non-repetitive forward surge (8.3ms half-sine) and 130A reverse surge (10μs/10ms exponential), enabling robust protection against ISO 16750-2 Pulse A/B and ISO 7637-2 Pulse 1/2a/3a/3b transients without thermal runaway under sustained case temperatures up to +175°C.

Key Specifications

Pinout & Package

Package: DO-218 (Type E), molded plastic UL 94V-0 housing with matte tin-plated terminals; anode connected to heatsink tab, cathode marked by bar on top view.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive TVS diode applications.

Compared with SMAJ22A-13-F and SMCJ22A, the DM8W27Q-13 uniquely combines 6600W surge capacity, 0.90°C/W thermal resistance, and AEC-Q101 qualification in the compact DO-218 form factor-enabling single-device compliance with full ISO 16750-2 load dump requirements where space and thermal performance are critical.

Availability

DM8W27Q-13 is available at Aetrix Electronics and suitable for automotive ECU power protection, body control module surge suppression, and ADAS camera input hardening requiring stable component supply and long-term automotive lifecycle support.

Supply support for DM8W27Q-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.

The DM8W27Q-13 belongs to Diodes' AEC-Q101-qualified TVS diode product line, engineered specifically for automotive power-line surge immunity with emphasis on thermal robustness, high-temperature stability, and ISO standard compliance.

FAQ

What is the maximum clamping voltage of the DM8W27Q-13 at its rated peak pulse current?

The DM8W27Q-13 has a maximum clamping voltage (V_C) of 40V at 75A peak pulse current (10/1000µs waveform), as specified in the Electrical Characteristics table. This value is measured under standardized test conditions and ensures downstream components see no more than 40V during worst-case surge events.

Is the DM8W27Q-13 suitable for bidirectional surge protection?

No-the DM8W27Q-13 is a unidirectional TVS diode, with polarity indicated by the cathode bar marking and anode-connected heatsink. It protects against positive transients on the cathode side only. For bidirectional protection, two devices in series-opposing configuration or a dedicated bidirectional TVS (e.g., DM8W27C) would be required.

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

The DO-218 (Type E) package features a large metal heatsink tab directly bonded to the anode, achieving 0.90°C/W junction-to-case thermal resistance-significantly lower than SMA (≈35°C/W) or SMC (≈1.5°C/W). This enables higher continuous power dissipation and faster transient energy removal in high-temperature automotive environments.

Does the DM8W27Q-13 require derating at elevated ambient temperatures?

Yes-its 8W steady-state power dissipation is rated at T_C = +25°C. Figure 1 in the datasheet shows linear derating to zero at +175°C case temperature. Designers must calculate actual case temperature using board layout, copper area, and airflow to ensure safe operation within the derated PM(AV) envelope.