Vishay General Semiconductor - Diodes Division TPSMC22AHE3_A/I

Overview

TPSMC22AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 22 V nominal breakdown voltage (V_BR = 20.9–23.1 V), 1500 W peak pulse power (10/1000 µs), 49.0 V maximum clamping voltage at 10 A, 185 °C maximum junction temperature, and SMC (DO-214AB) package - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.

For engineers reviewing the TPSMC22AHE3_A/I datasheet, TPSMC22AHE3_A/I pinout, TPSMC22AHE3_A/I application, or TPSMC22AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, TJ = 185 °C rating, 1.0 µA max reverse leakage at V_WM, and compatibility with high-reliability PCB layouts requiring MSL Level 1 reflow.

Technical Context

This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress. Its 10/1000 µs waveform response supports IEC 61000-4-5 compliance in system-level surge testing, with low incremental surge resistance ensuring minimal voltage overshoot during fast transients.

The device operates across -65 °C to +185 °C, enabling use in under-hood automotive environments and industrial motor drives. Its 18.8 V stand-off voltage (V_WM) and 1.0 µA reverse leakage at 25 °C provide reliable blocking in 15–24 V DC systems without standby current penalty.

Key Specifications

Pinout & Package

SMC (DO-214AB) package with two terminals: cathode (marked by color band) and anode. Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal to meet thermal and surge-current requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS diode applications.

Compared with SMAJ22A and 1.5SMC22A, the TPSMC22AHE3_A/I provides guaranteed AEC-Q101 qualification, 1500 W surge capacity, and 185 °C operation - making it uniquely suitable for high-temperature automotive power modules where sustained reliability under thermal stress is non-negotiable.

Availability

TPSMC22AHE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, telecom DC feeds, and consumer sensor interface applications requiring stable component supply, AEC-Q101 validation, and high-temperature operational margin.

Supply support for TPSMC22AHE3_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, TVS devices, and optoelectronics with emphasis on high-reliability, high-power, and automotive-grade performance.

The TPSMC series is engineered specifically for demanding transient suppression in automotive and industrial power systems, delivering extended temperature capability, AEC-Q101 qualification, and robust surge handling in compact SMC packaging.

FAQ

What is the maximum clamping voltage of the TPSMC22AHE3_A/I at its rated peak pulse current?

The TPSMC22AHE3_A/I has a maximum clamping voltage (V_C) of 49.0 V at 10 A peak pulse current (I_PPM) under 10/1000 µs waveform conditions. This value is measured per JEDEC standards and ensures downstream components rated for ≤50 V operation remain within safe operating limits during surge events. The TPSMC22AHE3_A/I maintains this clamping performance across its full temperature range.

Is the TPSMC22AHE3_A/I qualified for automotive applications?

Yes, the TPSMC22AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. This qualification covers stress tests including HTGB, H3TRB, and temperature cycling - validating its suitability for automotive powertrain and body electronics where reliability under thermal and mechanical stress is critical. The TPSMC22AHE3_A/I meets these requirements without derating up to +185 °C.

What does the "HE3" suffix indicate in TPSMC22AHE3_A/I?

The "HE3" suffix in TPSMC22AHE3_A/I specifies that the device is RoHS-compliant and AEC-Q101 qualified, with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. It also confirms compliance with JESD 201 Class 2 whisker resistance. The "A/I" portion denotes the revision code "A" and tape-and-reel packaging in 13-inch reels (3500 units per reel). This distinguishes it from HM3 (halogen-free) or non-qualified base variants.

How does the TPSMC22AHE3_A/I compare to bidirectional TVS diodes in circuit protection?

The TPSMC22AHE3_A/I is unidirectional and optimized for DC power line protection where only positive-going transients occur - such as in 24 V automotive systems or regulated DC supplies. Unlike bidirectional TVS diodes, it offers lower leakage (<1.0 µA at 18.8 V) and higher surge capacity in the forward direction. Bidirectional variants would introduce unnecessary conduction paths and higher capacitance, degrading noise immunity in sensitive analog or high-speed digital circuits protected by the TPSMC22AHE3_A/I.

What PCB layout considerations are required for optimal performance of the TPSMC22AHE3_A/I?

For optimal thermal and surge performance, the TPSMC22AHE3_A/I must be mounted on 8.0 mm × 8.0 mm copper pads at each terminal, per Vishay's datasheet recommendation. Short, wide traces to ground or return paths minimize inductance and preserve clamping speed. Avoid routing sensitive signals near the device, and ensure the cathode-to-ground path has lowest possible impedance. The TPSMC22AHE3_A/I's SMC (DO-214AB) footprint requires precise stencil design for 0.152 mm lead thickness and MSL Level 1 reflow compatibility.