Vishay General Semiconductor - Diodes Division SMBJ6.0AHE3_A/H

Overview

SMBJ6.0AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on power and signal lines. It features 6.0 V stand-off voltage (V_WM), 6.67–7.37 V breakdown voltage (V_BR) at 10 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤10.3 V at 58.3 A peak surge current - deployed in automotive sensor protection and industrial I/O interface circuits.

For engineers reviewing the SMBJ6.0AHE3_A/H datasheet, SMBJ6.0AHE3_A/H pinout, SMBJ6.0AHE3_A/H application, or SMBJ6.0AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 150 °C max junction temperature, low clamping ratio (VC/VBR ≈ 1.49), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.

Technical Context

This TVS diode operates as a voltage-clamping protection device in series with sensitive downstream circuitry. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle. The device is rated for 100 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 0.059 %/°C V_BR temperature coefficient.

Designed for unidirectional operation, SMBJ6.0AHE3_A/H uses cathode-band marking and delivers 5.0 W steady-state power dissipation at T_A = 50 °C. Its thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation in compact PCB layouts with minimal heatsinking.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, cathode indicated by band marking. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ6.0AHE3_A/H, SMBJ6.0A-E3/52 offers identical electrical performance at lower cost but no automotive qualification, while SMCJ6.0AHE3_A/H provides 2.5× higher surge capacity in a physically larger package - enabling tiered protection architecture across board zones.

Availability

SMBJ6.0AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, consumer power adapter outputs, and telecom Ethernet port protection requiring stable component supply and AEC-Q101 traceability.

Supply support for SMBJ6.0AHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.

The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and communications systems where failure due to voltage surges must be eliminated.

FAQ

What is the maximum clamping voltage of SMBJ6.0AHE3_A/H at its rated peak pulse current?

The SMBJ6.0AHE3_A/H clamps to a maximum of 10.3 V when subjected to its rated peak pulse current of 58.3 A (10/1000 µs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the worst-case overvoltage imposed on protected circuitry during surge events. The clamping voltage directly impacts system-level immunity margin and must be validated against the absolute maximum ratings of downstream components in the SMBJ6.0AHE3_A/H application.

Is SMBJ6.0AHE3_A/H qualified for automotive applications?

Yes, SMBJ6.0AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet revision 09-Jan-2024. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making SMBJ6.0AHE3_A/H suitable for engine control, body electronics, and ADAS sensor modules where automotive-grade reliability is mandatory.

What is the standoff voltage (V_WM) and why is it critical for SMBJ6.0AHE3_A/H selection?

The standoff voltage (V_WM) of SMBJ6.0AHE3_A/H is 6.0 V - the maximum DC or continuous reverse voltage the device can withstand without entering avalanche breakdown. Selecting a V_WM ≥10–20% above the normal operating voltage of the protected line prevents false triggering and excessive leakage. For example, SMBJ6.0AHE3_A/H is appropriate for 5 V systems but not for 12 V rails, where SMBJ12AHE3_A/H would be required instead.

Does SMBJ6.0AHE3_A/H have polarity markings, and how is it oriented on the PCB?

Yes, SMBJ6.0AHE3_A/H is unidirectional and features a cathode band marking on the package body. During PCB layout, the banded end must connect to the higher-potential node (e.g., V_CC or signal line), while the unbanded end connects to ground or return. Incorrect orientation renders the device ineffective for reverse-transient suppression and may cause catastrophic failure during overvoltage events - proper placement is essential in every SMBJ6.0AHE3_A/H design.

What is the thermal resistance and how does it affect SMBJ6.0AHE3_A/H derating in real-world layouts?

SMBJ6.0AHE3_A/H has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W when mounted on minimum recommended pad layout (0.2" × 0.2" copper). In compact PCBs with limited copper area, power dissipation must be derated significantly above 25 °C ambient - for example, at 70 °C ambient, its usable steady-state power drops below 2.5 W. Layout optimization using thermal vias and extended copper pours is strongly advised to maintain reliability in SMBJ6.0AHE3_A/H deployments.