Vishay General Semiconductor - Diodes Division SMBJ13AHM3_B/H

Overview

SMBJ13AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 13 V standoff voltage (V_WM), 14.4–15.9 V breakdown range (V_BR at 1.0 mA), 21.5 V maximum clamping voltage (V_C) at 27.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive control modules.

For engineers reviewing the SMBJ13AHM3_B/H datasheet, SMBJ13AHM3_B/H pinout, SMBJ13AHM3_B/H application, or SMBJ13AHM3_B/H equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, junction-to-lead thermal resistance, and real-world clamping performance under repetitive surge conditions.

Technical Context

This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its V_BR threshold. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at V_WM), while the SMB package supports automated SMT placement and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.

It delivers 600 W peak pulse power handling with 0.01% duty cycle, 150 °C max junction temperature, and 20 °C/W junction-to-lead thermal resistance - enabling reliable protection in high-energy transient environments such as 12 V automotive power rails and industrial I/O modules subject to ISO 7637-2 pulses.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ13AHM3_B/H, the HE3 variant omits AEC-Q101 validation and thus cannot be deployed in automotive safety-critical subsystems, while the M3/52 version offers identical performance in alternate packaging - making SMBJ13AHM3_B/H the sole choice when both halogen-free construction and automotive qualification are mandatory.

Availability

SMBJ13AHM3_B/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, consumer appliance motor drives, and telecom power supply overvoltage protection requiring stable component supply across extended production lifecycles.

Supply support for SMBJ13AHM3_B/H 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

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific performance.

The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications where robustness, low clamping voltage, and AEC-Q101 compliance are essential.

FAQ

What is the clamping voltage of SMBJ13AHM3_B/H at its rated peak pulse current?

The SMBJ13AHM3_B/H has a maximum clamping voltage (V_C) of 21.5 V at 27.9 A peak pulse current using the 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The SMBJ13AHM3_B/H maintains this clamping performance across its full operating temperature range and after repeated surge exposure, provided thermal limits are respected.

Is SMBJ13AHM3_B/H qualified for automotive applications?

Yes, SMBJ13AHM3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" - indicating halogen-free, RoHS-compliant construction plus full automotive reliability testing. This qualification covers temperature cycling, highly accelerated life testing (HALT), and ESD robustness, making SMBJ13AHM3_B/H suitable for under-hood and body electronics where zero-field-failure performance is mandated.

What is the standoff voltage (V_WM) of SMBJ13AHM3_B/H and how does it relate to system design?

The standoff voltage (V_WM) of SMBJ13AHM3_B/H is 13 V - the maximum continuous reverse voltage the device can block without entering avalanche conduction. In system design, V_WM must exceed the normal operating voltage of the protected line (e.g., 12 V nominal rail) with sufficient margin to avoid leakage-induced power loss or false triggering. For SMBJ13AHM3_B/H, this 13 V rating provides ~8% headroom above 12 V systems, aligning with industry best practices for TVS selection.

How does the thermal resistance R_θJL of SMBJ13AHM3_B/H affect its surge handling capability?

The SMBJ13AHM3_B/H has a typical junction-to-lead thermal resistance (R_θJL) of 20 °C/W, which directly governs its ability to dissipate heat during repetitive surge events. Unlike R_θJA, R_θJL reflects conduction through solder joints into PCB copper - enabling accurate thermal modeling when mounted on recommended pad layouts. This parameter allows designers to calculate junction temperature rise during burst-mode surges and verify compliance with the 150 °C T_J max limit without requiring external heatsinks.

What packaging and environmental compliance does SMBJ13AHM3_B/H meet?

SMBJ13AHM3_B/H uses an SMB (DO-214AA) package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is halogen-free and RoHS-compliant per Vishay's HM3 designation. It meets MSL Level 1 per J-STD-020 with a 260 °C peak reflow profile, and its molding compound satisfies UL 94 V-0 flammability requirements - ensuring compatibility with lead-free SMT processes and environmentally regulated end markets.