Vishay General Semiconductor - Diodes Division SMB10J8.0AHM3_A/H

Overview

SMB10J8.0AHM3_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 8.0 V stand-off voltage (V_WM), 13.6 V maximum clamping voltage (V_C) at 50 A peak pulse current, and 1000 W peak pulse power rating with 10/1000 µs waveform - used to safeguard automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.

For engineers reviewing the SMB10J8.0AHM3_A/H datasheet, SMB10J8.0AHM3_A/H pinout, SMB10J8.0AHM3_A/H application, or SMB10J8.0AHM3_A/H equivalent, key selection criteria include clamping performance under 50 A surge, AEC-Q101 qualification for automotive use, unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.

Technical Context

This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its 8.0 V stand-off threshold, it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at V_WM), while the SMB package supports thermal dissipation up to 150 °C junction temperature.

The device is rated for 100 A non-repetitive forward surge (8.3 ms half-sine) and meets MSL level 1 per J-STD-020 with 260 °C reflow peak. Its 72 °C/W junction-to-ambient thermal resistance requires minimum 0.2" × 0.2" copper pad layout for full 1000 W rating compliance.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band on one end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ8.0AHE3_A/H, SMB10J8.0AHM3_A/H adds halogen-free construction without sacrificing AEC-Q101 or electrical performance; versus SMCJ8.0AHE3_A/H, it trades 500 W surge headroom for 30% smaller PCB footprint and identical thermal derating profile.

Availability

SMB10J8.0AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer power adapter designs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.

Supply support for SMB10J8.0AHM3_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 reliability, power density, and automotive qualification.

The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in space-constrained automotive and industrial control applications.

FAQ

What is the clamping voltage of SMB10J8.0AHM3_A/H at its rated peak pulse current?

The SMB10J8.0AHM3_A/H has a maximum clamping voltage (V_C) of 13.6 V at 50 A peak pulse current (I_PPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB10J8.0AHM3_A/H maintains this clamping performance across its qualified operating temperature range.

Is SMB10J8.0AHM3_A/H qualified for automotive applications?

Yes, SMB10J8.0AHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its qualification covers temperature cycling, high-temperature reverse bias (HTRB), and ESD testing per automotive reliability standards. The "HM3" suffix explicitly denotes halogen-free AEC-Q101 compliance, making SMB10J8.0AHM3_A/H suitable for under-hood and body-control module applications.

What is the standoff voltage rating of SMB10J8.0AHM3_A/H, and how does it relate to circuit operation?

The SMB10J8.0AHM3_A/H has a stand-off voltage (V_WM) of 8.0 V, meaning it remains non-conductive under normal DC operating conditions up to this voltage. This allows integration on 8 V–9 V rails (e.g., automotive 12 V systems with dropout) without leakage or power loss. The SMB10J8.0AHM3_A/H begins clamping only when transients exceed its breakdown range of 8.89–9.83 V.

Does SMB10J8.0AHM3_A/H require special PCB layout considerations?

Yes - to achieve its full 1000 W peak pulse power rating, SMB10J8.0AHM3_A/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's thermal design guidelines. Smaller pads reduce heat dissipation and derate both power and surge current capability. The SMB10J8.0AHM3_A/H datasheet specifies exact pad dimensions and recommends thermal vias for high-reliability automotive layouts.

How does the glass-passivated junction in SMB10J8.0AHM3_A/H improve reliability?

The glass-passivated junction in SMB10J8.0AHM3_A/H provides superior stability versus epoxy-passivated alternatives, minimizing parameter drift after repeated surge events and improving long-term consistency of breakdown voltage and leakage current. This construction directly contributes to the AEC-Q101 qualification of SMB10J8.0AHM3_A/H and supports >1000 surge cycles at rated conditions without performance degradation.