Vishay General Semiconductor - Diodes Division SMB10J6.5AHE3_A/H

Overview

SMB10J6.5AHE3_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 with 1000 W peak pulse power (10/1000 µs), 6.5 V stand-off voltage, and 11.2 V clamping voltage at 89.3 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, MOSFET gates, and microcontroller I/O pins against inductive switching transients.

For engineers reviewing the SMB10J6.5AHE3_A/H datasheet, SMB10J6.5AHE3_A/H pinout, SMB10J6.5AHE3_A/H application, or SMB10J6.5AHE3_A/H equivalent, key selection criteria include clamping voltage margin relative to protected IC V_I/O, junction temperature derating above 25 °C, unidirectional polarity alignment with DC bias, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents <1 µA leakage at 6.5 V; when a transient exceeds its 7.22–7.98 V breakdown range (tested at 10 mA), it avalanches rapidly (<1 ns response) to clamp the line at ≤11.2 V. Its low incremental surge resistance ensures minimal voltage overshoot during 1000 W surges.

Thermally, it features R_θJA = 72 °C/W on standard 0.2" × 0.2" copper pads and R_θJL = 20 °C/W to leads, enabling sustained operation up to +150 °C junction temperature. The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Molding compound meets UL 94 V-0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ6.5AHE3_A/H, SMB10J6.5AHE3_A/H delivers 67% higher surge power handling without changing circuit topology; versus 1.5SMC6.5AHE3_A/H, it saves 40% board area while accepting higher thermal resistance - ideal for space-constrained automotive ECUs.

Availability

SMB10J6.5AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and DC-DC converter output protection requiring stable component supply with AEC-Q101 compliance and 1000 W surge immunity.

Supply support for SMB10J6.5AHE3_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 and automotive qualification.

The SMB10J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power, surface-mount transient suppression in harsh environments where AEC-Q101 validation and consistent clamping performance are mandatory.

FAQ

What is the clamping voltage of SMB10J6.5AHE3_A/H at its rated peak pulse current?

The SMB10J6.5AHE3_A/H has a maximum clamping voltage (V_C) of 11.2 V when subjected to its rated peak pulse current of 89.3 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit sees no more than 11.2 V during a full-power transient event. The SMB10J6.5AHE3_A/H datasheet specifies this parameter under standardized test conditions at T_A = 25 °C.

Is SMB10J6.5AHE3_A/H suitable for bidirectional signal line protection?

No, SMB10J6.5AHE3_A/H is a unidirectional TVS diode and must be used only on DC-biased lines where polarity is fixed - such as 5 V power rails or sensor outputs referenced to ground. For bidirectional AC or differential lines (e.g., RS-485, CAN), the bidirectional variant SMB8J6.5CAHE3_A/H is required. The SMB10J6.5AHE3_A/H cathode band marks the protected line side and cannot clamp negative-going transients.

Does SMB10J6.5AHE3_A/H meet automotive qualification standards?

Yes, SMB10J6.5AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number: 88422, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making it suitable for under-hood and body-control module applications. The "HE3" suffix explicitly denotes AEC-Q101 qualification and RoHS compliance.

What is the thermal resistance of SMB10J6.5AHE3_A/H, and how does it affect layout?

The SMB10J6.5AHE3_A/H has a typical junction-to-ambient thermal resistance (R_θJA) of 72 °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 during repeated surges, PCB layout must provide adequate copper area and minimize trace length to ground. Reducing pad size or omitting thermal vias increases R_θJA, risking thermal runaway. The SMB10J6.5AHE3_A/H thermal performance is validated only with the specified mounting conditions.

How does the breakdown voltage tolerance of SMB10J6.5AHE3_A/H impact circuit design?

The SMB10J6.5AHE3_A/H has a guaranteed breakdown voltage range of 7.22 V to 7.98 V at 10 mA test current. Designers must ensure the protected IC's absolute maximum voltage rating exceeds the upper limit (7.98 V), and that system operating voltage remains below the lower limit (7.22 V) to prevent premature conduction. This 10.5% tolerance requires margining in safety-critical designs - the SMB10J6.5AHE3_A/H is not intended for precision voltage reference use.