Vishay General Semiconductor - Diodes Division SMB10J8.0-E3/52

Overview

SMB10J8.0-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on DC power rails and signal lines. It features 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 - deployed in automotive power supply inputs and industrial sensor interfaces.

For engineers reviewing the SMB10J8.0-E3/52 datasheet, SMB10J8.0-E3/52 pinout, SMB10J8.0-E3/52 application, or SMB10J8.0-E3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, 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, triggering when reverse voltage exceeds its 8.89–9.83 V breakdown range (V_BR at 1.0 mA). Its glass-passivated junction enables fast response (<1 ns) to transients induced by inductive switching or ESD events.

Thermal performance is defined by 72 °C/W junction-to-ambient thermal resistance (R_θJA) and 20 °C/W junction-to-lead (R_θJL); derating applies above 25 °C ambient per Fig. 2, with maximum junction temperature limited to 150 °C.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode indicated by a color band on the case; leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 1A whisker test (E3 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ8.0A-E3/52, SMB10J8.0-E3/52 offers identical electrical performance and qualification but reflects updated Vishay part numbering; versus 1.5SMC8.0A, it delivers tighter clamping, smaller footprint, and certified automotive reliability - critical for safety-related power domains.

Availability

SMB10J8.0-E3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeder systems requiring stable component supply and long-term lifecycle support.

Supply support for SMB10J8.0-E3/52 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 and application-specific optimization.

The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered for high-power-density transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom infrastructure where robustness and AEC-Q101 compliance are mandatory.

FAQ

What is the breakdown voltage range for SMB10J8.0-E3/52?

The SMB10J8.0-E3/52 has a specified breakdown voltage (V_BR) range of 8.89 V to 9.83 V at 1.0 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures consistent turn-on behavior across production lots and temperature extremes, directly supporting its use as a precise overvoltage clamp in 8 V nominal systems. The SMB10J8.0-E3/52 maintains this specification under full automotive temperature range (-55 °C to +150 °C).

Is SMB10J8.0-E3/52 suitable for automotive applications?

Yes, SMB10J8.0-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control modules, body electronics, and ADAS power supplies. Its glass-passivated junction, MSL Level 1 reflow compatibility, and 150 °C maximum junction temperature meet stringent automotive reliability requirements. The SMB10J8.0-E3/52 also complies with JESD201 Class 1A whisker testing and RoHS directives, confirming suitability for production automotive PCBs.

What is the maximum clamping voltage of SMB10J8.0-E3/52 at its rated peak pulse current?

The SMB10J8.0-E3/52 clamps to a maximum of 13.6 V at its rated peak pulse current (I_PPM) of 50 A under the standard 10/1000 µs waveform. This value is guaranteed across manufacturing lots and validated per JEDEC test methods. The low clamping voltage ensures downstream components such as 12 V-rated CAN transceivers or 16 V-tolerant microcontrollers remain within safe operating limits during surge events. The SMB10J8.0-E3/52 achieves this with minimal incremental surge resistance.

Does SMB10J8.0-E3/52 have polarity markings, and how is it oriented on the PCB?

Yes, SMB10J8.0-E3/52 is unidirectional and features a visible cathode band on the case - the banded end must be connected to the higher-potential side (e.g., +12 V rail), while the anode connects to ground or return. This orientation ensures proper reverse-bias operation during overvoltage events. The DO-214AA (SMB) package uses matte tin-plated leads with standardized 2.29 mm lead pitch, and polarity alignment is verified using optical inspection per IPC-A-610 Class 2 guidelines. The SMB10J8.0-E3/52 must not be installed backwards, as forward conduction would short the protected line.

What is the thermal resistance profile of SMB10J8.0-E3/52, and how does it affect PCB layout?

The SMB10J8.0-E3/52 has a typical junction-to-ambient thermal resistance (R_θJA) of 72 °C/W and junction-to-lead (R_θJL) of 20 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain T_J ≤ 150 °C under 1000 W surge conditions, PCB layout must allocate ≥5.0 mm² copper per pad with internal thermal vias to inner ground planes. The SMB10J8.0-E3/52 datasheet specifies this pad geometry as minimum; reducing pad size increases R_θJA and risks thermal runaway during repetitive surges.