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

Overview

SMBJ6.0AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 6.0 V stand-off voltage (VWM), 6.67–7.37 V breakdown voltage (VBR) 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/I datasheet, SMBJ6.0AHE3_A/I pinout, SMBJ6.0AHE3_A/I application, or SMBJ6.0AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.

Technical Context

This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior under repetitive 10/1000 µs surges. Its thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature when mounted per recommended pad layout.

The SMBJ6.0AHE3_A/I exhibits 0.059 %/°C temperature coefficient of VBR and ≤800 µA reverse leakage at VWM (6.0 V), ensuring minimal standby power loss. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded epoxy case meeting UL 94 V-0 flammability rating; terminals are matte tin-plated, solderable per J-STD-002; polarity indicated by cathode band on unidirectional devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ6.0AHE3_A/I, the SMBJ6.0A-E3/52 offers identical electrical performance without AEC-Q101 validation, while SAC6.0 trades thermal robustness and surge repetition capability for miniaturization - making SMBJ6.0AHE3_A/I optimal for automotive and high-reliability industrial use cases demanding sustained 150 °C operation and validated qualification.

Availability

SMBJ6.0AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface designs requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for SMBJ6.0AHE3_A/I 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, efficiency, and application-specific optimization.

The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching surges is mission-critical.

FAQ

What is the maximum clamping voltage of SMBJ6.0AHE3_A/I under rated surge conditions?

The SMBJ6.0AHE3_A/I has a maximum clamping voltage (VC) of 10.3 V when subjected to its rated peak pulse current (IPPM) of 58.3 A using the standard 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ6.0AHE3_A/I maintains this clamping performance across its full operating temperature range and after repeated surge exposures, provided thermal design guidelines are followed.

Is SMBJ6.0AHE3_A/I suitable for bidirectional transient protection?

No, SMBJ6.0AHE3_A/I is a unidirectional TVS diode, identified by its cathode band marking and specified parameters such as forward voltage (VF ≤ 3.5 V at 50 A) and single-polarity breakdown. For bidirectional protection, Vishay offers the SMBJ6.0CA variant. Using SMBJ6.0AHE3_A/I in a bidirectional configuration would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit - always verify polarity alignment in schematic implementation of SMBJ6.0AHE3_A/I.

Does SMBJ6.0AHE3_A/I require derating at elevated ambient temperatures?

Yes, SMBJ6.0AHE3_A/I must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number: 88392). Its peak pulse power capability decreases linearly with rising junction temperature, reaching ~50 % of 600 W at TJ ≈ 100 °C. Effective thermal management - including minimum 0.2" × 0.2" copper pads per terminal and consideration of RθJA = 100 °C/W - is essential to maintain performance in high-ambient applications like engine control units or enclosed industrial drives.

What does the "HE3" suffix indicate in SMBJ6.0AHE3_A/I?

The "HE3" suffix in SMBJ6.0AHE3_A/I denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade variants (e.g., "E3") and halogen-free versions (e.g., "HM3"). The "A/I" revision code specifies packaging in 13" diameter tape-and-reel (3200 units per reel) with moisture sensitivity level (MSL) 1 handling. This suffix combination confirms that SMBJ6.0AHE3_A/I meets automotive reliability standards including HTGB, H3TRB, and mechanical shock testing per AEC-Q101 Rev G.

Can SMBJ6.0AHE3_A/I replace SMAJ6.0A in an existing design?

No direct replacement is assured: SMBJ6.0AHE3_A/I uses the larger SMB (DO-214AA) package (5.59 mm × 4.06 mm), whereas SMAJ6.0A uses the smaller SMA (DO-214AC) package (4.57 mm × 2.79 mm). Although both share 6.0 V VWM and 600 W PPPM, the SMBJ6.0AHE3_A/I has higher thermal mass and lower RθJL (20 °C/W vs. ~30 °C/W for SMAJ), requiring PCB pad redesign and layout verification. Electrical substitution is possible only after confirming mechanical fit, thermal performance, and surge repetition rate compatibility in the target application.