Vishay General Semiconductor - Diodes Division SMB10J15AHE3_A/H

Overview

SMB10J15AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 15 V stand-off voltage (V_WM), 16.7–18.5 V breakdown voltage (V_BR at 1 mA), 24.4 V clamping voltage (V_C) at 41 A peak pulse current, and 1000 W peak pulse power rating (10/1000 µs waveform). It is AEC-Q101 qualified and used in automotive sensor interface protection.

For engineers reviewing the SMB10J15AHE3_A/H datasheet, SMB10J15AHE3_A/H pinout, SMB10J15AHE3_A/H application, or SMB10J15AHE3_A/H equivalent, this device is selected for robust overvoltage immunity in 12 V automotive subsystems, ESD-prone industrial I/O, and DC power input stages where low clamping voltage and fast response (<1 ns) are critical to safeguarding downstream MOSFETs and microcontrollers.

Technical Context

This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 15 V), then avalanches sharply at ~17.4 V (typ.) to divert transient energy away from sensitive circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.

Thermally, it delivers 72 °C/W junction-to-ambient resistance on standard 0.2" × 0.2" copper pads, enabling effective power dissipation during 1000 W pulses. The SMB package supports automated SMT placement and meets UL 94 V-0 flammability requirements, with matte tin-plated leads compliant to J-STD-002 solderability standards.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, cathode indicated by band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended pad layout: 5.59 mm × 2.18 mm minimum per terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ15A-E3/52, SMB10J15AHE3_A/H adds AEC-Q101 validation and halogen-free construction; versus SMCJ15AHE3_A/H, it trades 500 W peak power and 32 °C/W lower thermal resistance for 30% smaller footprint-enabling compact automotive module designs.

Availability

SMB10J15AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and DC power distribution requiring stable component supply with full AEC-Q101 traceability and RoHS/halogen-free compliance.

Supply support for SMB10J15AHE3_A/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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, high-power-density solutions.

The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for automotive and industrial surge immunity-balancing low clamping voltage, fast response, and AEC-Q101 validated ruggedness in compact surface-mount packages.

FAQ

What is the maximum clamping voltage of SMB10J15AHE3_A/H under a 10/1000 µs surge?

The SMB10J15AHE3_A/H has a maximum clamping voltage (V_C) of 24.4 V when subjected to its rated peak pulse current of 41 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 24.4 V during such transients-critical for protecting 3.3 V or 5 V logic interfaces. The SMB10J15AHE3_A/H achieves this with low incremental resistance and tight V_BR tolerance.

Is SMB10J15AHE3_A/H suitable for automotive applications?

Yes, SMB10J15AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to ensure reliability in under-hood and cabin environments. The SMB10J15AHE3_A/H is commonly deployed in body control modules, sensor hubs, and infotainment power rails where ISO 16750-2 and ISO 7637-2 compliance is required.

What does the "HE3" suffix indicate in SMB10J15AHE3_A/H?

The "HE3" suffix in SMB10J15AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification and halogen-free molding compound. The "H" indicates AEC-Q101 grade, "E3" confirms RoHS compliance, and the trailing "_A/H" specifies packaging: "A" is the revision code, "H" is the tape-and-reel package code (750 units per 7" reel). This distinguishes it from commercial variants like SMBJ15A-E3/52, which lack automotive validation.

How does SMB10J15AHE3_A/H compare to bidirectional TVS diodes with the same V_WM?

Unlike bidirectional types (e.g., SMB8J15CA), SMB10J15AHE3_A/H is unidirectional and optimized for DC-biased lines-offering lower leakage (<1 µA at 15 V) and higher peak pulse power (1000 W vs. 800 W for SMB8J15CA). Its single-junction design avoids the dual-breakdown complexity of bidirectional devices, making it preferable for 12 V battery-fed circuits where reverse polarity protection is handled separately. The SMB10J15AHE3_A/H also features tighter V_BR tolerance (±5.5%) versus typical ±10% in bidirectional variants.

What is the thermal resistance of SMB10J15AHE3_A/H, and how does it affect layout?

The SMB10J15AHE3_A/H has a typical junction-to-ambient thermal resistance (R_θJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain safe junction temperatures during repeated surges, designers must provide adequate copper area and avoid narrow traces. The SMB10J15AHE3_A/H datasheet specifies minimum pad dimensions (2.18 mm × 5.59 mm) to achieve this rating-deviations increase thermal impedance and risk thermal runaway.