Vishay General Semiconductor - Diodes Division SMB10J26-E3/5B

Overview

SMB10J26-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on power and signal lines. It features a 26 V standoff voltage (V_WM), 28.9–31.9 V breakdown voltage (V_BR at 1 mA), 42.1 V clamping voltage (V_C) at 23.8 A peak pulse current, and 1000 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply rails and industrial sensor interfaces.

For engineers reviewing the SMB10J26-E3/5B datasheet, SMB10J26-E3/5B pinout, SMB10J26-E3/5B application, or SMB10J26-E3/5B equivalent, key selection criteria include clamping performance under 23.8 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification for automotive use, 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 crowbar device during transients, leveraging an avalanche breakdown mechanism to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable V_BR tolerance (±5%) and low leakage (<1.0 µA at 26 V), while thermal resistance R_θJA = 72 °C/W supports operation up to 150 °C junction temperature.

The device complies with ANSI/IEEE C62.35 standards for transient suppression and meets J-STD-020 MSL Level 1 (peak reflow 260 °C). Its unidirectional configuration provides forward conduction capability (I_FSM = 100 A, 8.3 ms half-sine) and is optimized for DC-biased lines where reverse blocking is required.

Key Specifications

Pinout & Package

DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode indicated by a color band on the body end. Leads are solderable per J-STD-002 and JESD 22-B102; meets JESD 201 Class 1A whisker test.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ26A-E3/5B, SMB10J26-E3/5B delivers 67% higher peak power handling and automotive qualification; versus SMCJ26A-E3/57T, it offers identical clamping performance in a 30% smaller footprint - critical for space-constrained ECUs and sensor nodes.

Availability

SMB10J26-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feeder safeguarding requiring stable component supply across multi-year production cycles.

Supply support for SMB10J26-E3/5B 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 performance.

The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.

FAQ

What is the clamping voltage of SMB10J26-E3/5B at its rated peak pulse current?

The SMB10J26-E3/5B has a maximum clamping voltage (V_C) of 42.1 V when subjected to its rated peak pulse current of 23.8 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 42.1 V during standardized surge events - a critical parameter for ensuring compatibility with 45 V-rated power management ICs in the same design.

Is SMB10J26-E3/5B suitable for automotive applications?

Yes, SMB10J26-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and validation across temperature cycling, humidity, and surge endurance tests required for engine control, body electronics, and ADAS subsystems. The "HE3" variant is fully qualified; the "E3" suffix in SMB10J26-E3/5B denotes RoHS-compliant commercial grade - however, this specific part number is documented in Vishay's AEC-Q101-certified family per document 88422 revision 12-Nov-12.

What does the "-E3/5B" suffix indicate in SMB10J26-E3/5B?

The "-E3/5B" suffix specifies two attributes: "E3" indicates RoHS-compliant, commercial-grade packaging meeting JESD 201 Class 1A whisker resistance, while "5B" denotes packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format supports high-speed pick-and-place assembly and is distinct from the "52" code used for 7-inch reels with 750-unit quantities.

How does SMB10J26-E3/5B differ from SMBJ26A in practical design terms?

SMB10J26-E3/5B delivers 1000 W peak pulse power versus 600 W for SMBJ26A, enabling robust protection against severe transients like ISO 7637-2 Pulse 5a. It also features tighter V_BR tolerance (28.9–31.9 V vs. 28.9–32.0 V), lower leakage (<1.0 µA vs. <5.0 µA), and AEC-Q101 qualification - making SMB10J26-E3/5B the preferred choice for automotive and mission-critical industrial designs where surge margin and reliability are non-negotiable.

What is the thermal resistance of SMB10J26-E3/5B, and how does it affect layout?

The SMB10J26-E3/5B 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 safe operation at full 1000 W surge rating, PCB layout must provide at least this pad area for each terminal - undersized pads increase thermal impedance, raising junction temperature and risking parametric shift or failure during repetitive surges. Thermal vias under pads further reduce R_θJA in high-ambient designs.