Vishay General Semiconductor - Diodes Division SMB10J22AHE3_A/I

Overview

SMB10J22AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 1000 W peak pulse power (10/1000 µs), 28.2 A peak pulse current (IPPM), and clamps transients to ≤35.5 V. It is AEC-Q101 qualified and used in automotive power supply inputs.

For engineers reviewing the SMB10J22AHE3_A/I datasheet, SMB10J22AHE3_A/I pinout, SMB10J22AHE3_A/I application, or SMB10J22AHE3_A/I equivalent, key selection criteria include clamping voltage vs. protected IC's absolute maximum rating, VWM margin above operating voltage, AEC-Q101 qualification status, thermal derating above 25 °C, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.

Technical Context

This TVS diode operates as a shunt-clamping device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR and low leakage (<1 µA at 22 V), while its low incremental surge resistance enables effective energy diversion during fast transients (response time <1 ns). The device complies with ANSI/IEEE C62.35 for surge testing.

Thermal performance is defined by R_θJA = 72 °C/W (on 0.2" × 0.2" copper pads) and R_θJL = 20 °C/W, supporting operation up to T_J = +150 °C. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance, with matte tin-plated leads solderable per J-STD-002.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode identified by color band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ22A-E3/52, SMB10J22AHE3_A/I adds AEC-Q101 qualification and automotive traceability; compared with SMCJ22AHE3_A/I, it trades 500 W peak power and 32 °C/W lower thermal resistance for 30% smaller PCB area and compatibility with fine-pitch SMT lines.

Availability

SMB10J22AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom DC feeders, and consumer USB power ports requiring stable component supply across production lifecycles.

Supply support for SMB10J22AHE3_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, power density, and automotive-grade validation.

The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial power systems where AEC-Q101 compliance and consistent clamping performance are mandatory.

FAQ

What is the clamping voltage of SMB10J22AHE3_A/I at its rated peak pulse current?

The SMB10J22AHE3_A/I has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 28.2 A under the standard 10/1000 µs waveform. This value is measured at T_A = 25 °C on recommended 5.0 mm × 5.0 mm copper pads and is critical for ensuring protected ICs remain within their absolute maximum voltage ratings during surge events. The SMB10J22AHE3_A/I maintains this clamping performance across its full operating temperature range.

Is SMB10J22AHE3_A/I suitable for bidirectional signal line protection?

No, SMB10J22AHE3_A/I is a unidirectional TVS diode, indicated by its part number suffix "A" and cathode band marking. It conducts only in reverse breakdown and blocks forward current beyond ~3.5 V. For bidirectional protection (e.g., RS-485, CAN bus), the SMB10J22CA variant - with "CA" suffix - must be used. The SMB10J22AHE3_A/I is intended for DC power rail protection where polarity is fixed and forward conduction is not required.

Does SMB10J22AHE3_A/I require derating at elevated ambient temperatures?

Yes, SMB10J22AHE3_A/I must be derated above T_A = 25 °C per Figure 2 in the Vishay datasheet (Document Number 88422). At 85 °C ambient, its peak pulse power drops to approximately 650 W, and at 125 °C, it falls to ~350 W. Derating is based on junction temperature limits (T_J ≤ 150 °C) and thermal resistance (R_θJA = 72 °C/W). Proper PCB copper area and airflow must be validated for each application to ensure SMB10J22AHE3_A/I remains within safe operating limits.

What does the "HE3_A/I" suffix in SMB10J22AHE3_A/I signify?

The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "A" is the revision code per Vishay's internal documentation; "I" specifies packaging in 13-inch tape-and-reel format with 3200 units per reel. This full suffix confirms the part meets automotive reliability standards, environmental compliance, and logistics requirements for high-volume SMT assembly. The SMB10J22AHE3_A/I is traceable to lot-level test data and certified to JESD201 Class 2 whisker resistance.

Can SMB10J22AHE3_A/I replace SMBJ22A in an existing design?

SMB10J22AHE3_A/I shares identical electrical specifications (VWM, VBR, VC, PPPM) and SMB package dimensions with SMBJ22A, but adds AEC-Q101 qualification, enhanced process controls, and automotive traceability. No PCB layout change is needed. However, qualification retesting per automotive standards (e.g., AEC-Q200 stress tests) is required if migrating from commercial-grade SMBJ22A to SMB10J22AHE3_A/I in a vehicle application - the SMB10J22AHE3_A/I itself is qualified, but system-level validation remains the customer's responsibility.