Vishay General Semiconductor - Diodes Division SMBJ6.0D-M3/H

Overview

SMBJ6.0D-M3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features a 6.0 V stand-off voltage (VWM), 6.77–7.27 V breakdown voltage (VBR) at 10 mA, 10.2 V maximum clamping voltage (VC) at 58.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform).

For engineers reviewing the SMBJ6.0D-M3/H datasheet, SMBJ6.0D-M3/H pinout, SMBJ6.0D-M3/H application, or SMBJ6.0D-M3/H equivalent, key selection criteria include unidirectional polarity, tight ±3.5 % VBR tolerance, low leakage (<500 μA at VWM), M3 halogen-free RoHS-compliant industrial-grade construction, and compatibility with automated SMT placement on standard PCB pad layouts.

Technical Context

This TVS diode operates as a voltage-clamping protection device placed in parallel with sensitive circuit nodes-such as DC power rails or I/O lines-to shunt surge energy to ground when transient voltage exceeds VBR. Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond transients induced by inductive load switching or lightning surges.

The SMBJ6.0D-M3/H is rated for TJ = –55 °C to +150 °C, with thermal resistance RθJA = 125 °C/W (on minimum pad layout) and RθJM = 20 °C/W. It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C), and its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), unidirectional configuration with cathode band marking on one end. Matte tin-plated terminals, halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 whisker test.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ6.0A-M3/H and P6SMB6.0A, the SMBJ6.0D-M3/H delivers tighter VBR control and full M3 industrial qualification-critical for designs requiring repeatable clamping behavior and regulatory compliance in harsh environments.

Availability

SMBJ6.0D-M3/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and consumer USB power port protection requiring stable component supply, long-term lifecycle support, and M3-compliant sourcing.

Supply support for SMBJ6.0D-M3/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 efficiency, and industrial-grade qualification.

The SMBJ series is engineered for robust transient suppression in demanding environments-designed to meet automotive, industrial, and telecom surge immunity standards while supporting high-volume SMT manufacturing.

FAQ

What is the clamping voltage of SMBJ6.0D-M3/H at its rated peak pulse current?

The SMBJ6.0D-M3/H has a maximum clamping voltage (VC) of 10.2 V at its rated peak pulse current (IPPM) of 58.9 A, measured using the standardized 10/1000 μs waveform. This value defines the highest voltage that will appear across the protected circuit during a full 600 W transient event, making it critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ6.0D-M3/H achieves this performance with low incremental surge resistance and fast response.

Is SMBJ6.0D-M3/H suitable for bidirectional transient protection?

No, SMBJ6.0D-M3/H is a unidirectional TVS diode, indicated by the "D" (not "CD") suffix and presence of a cathode band. It conducts only during reverse-biased overvoltage events. For bidirectional protection-such as AC lines or differential data buses-use the SMBJ6.0CD-M3/H variant, which provides symmetrical clamping in both polarities. The SMBJ6.0D-M3/H must be oriented correctly on PCB with cathode tied to ground or reference potential.

What does the "M3/H" suffix mean in SMBJ6.0D-M3/H?

The "M3" suffix denotes Vishay's industrial-grade qualification: halogen-free molding compound, RoHS compliance, and JESD 201 Class 2 whisker resistance. The "H" indicates packaging in 7″ diameter plastic tape and reel, with 750 units per reel. This distinguishes SMBJ6.0D-M3/H from variants like SMBJ6.0D-M3/I (13″ reel, 3200 units) and confirms full M3 compliance required for automotive and industrial BOMs. The SMBJ6.0D-M3/H meets UL 497B recognition (E136766).

How does SMBJ6.0D-M3/H compare to SMAJ6.0A in terms of power handling?

The SMBJ6.0D-M3/H handles 600 W peak pulse power (10/1000 μs), whereas the SMAJ6.0A (SMA package) is rated for only 400 W. This 50 % higher power capability stems from the larger SMB (DO-214AA) footprint, which improves thermal dissipation and surge current capacity. For applications subject to repeated or high-energy transients-such as 12 V automotive systems-the SMBJ6.0D-M3/H provides greater margin than SMAJ6.0A without changing circuit topology.

Can SMBJ6.0D-M3/H be used in place of SMBJ6.0A-M3/H?

Yes, SMBJ6.0D-M3/H can replace SMBJ6.0A-M3/H in most designs, as both share identical VWM (6.0 V), PPPM (600 W), SMB package, and M3 compliance-but SMBJ6.0D-M3/H offers tighter ±3.5 % VBR tolerance versus ±5 % for SMBJ6.0A-M3/H. This improved consistency reduces design margin uncertainty in precision clamping applications. No PCB changes are needed, since both are pin-to-pin compatible unidirectional SMB devices. Always verify clamping margin with SMBJ6.0D-M3/H's 10.2 V VC in final layout.