Vishay General Semiconductor - Diodes Division TPSMB7.5AHM3_A/H

Overview

TPSMB7.5AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 7.5 V nominal breakdown voltage (V_BR), 6.4 V stand-off voltage (V_WM), 600 W peak pulse power (10/1000 µs), 11.3 V maximum clamping voltage at 53.1 A, and operates up to +185 °C junction temperature - deployed in automotive sensor protection and industrial power supply input stages.

For engineers reviewing the TPSMB7.5AHM3_A/H datasheet, TPSMB7.5AHM3_A/H pinout, TPSMB7.5AHM3_A/H application, or TPSMB7.5AHM3_A/H equivalent, this page delivers verified package mapping (SMB/DO-214AA), polarity confirmation (cathode-banded), AEC-Q101 qualification status, thermal derating curves, and real-world clamping performance under repetitive surge conditions.

Technical Context

This TVS diode uses passivated anisotropic rectifier technology to achieve stable breakdown characteristics across temperature (α_T = 0.052 %/°C) and low incremental surge resistance. Its unidirectional configuration enables robust forward conduction during overvoltage events while maintaining tight V_BR tolerance (±5 %) and sub-1 ns response time.

Rated for 75 A non-repetitive forward surge current (8.3 ms half-sine), it sustains operation under high-reliability automotive conditions (T_J = –65 °C to +185 °C) and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The SMB package supports automated placement and provides UL 94 V-0 flammability compliance.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, cathode indicated by molded band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Matte tin-plated leads, J-STD-002 solderable, MSL Level 1 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ7.5A and TPSMB7.5AHE3_A/H, the TPSMB7.5AHM3_A/H uniquely combines 600 W surge capacity, +185 °C operation, AEC-Q101 qualification, and halogen-free construction - making it the only option qualified for under-hood automotive electronics requiring full material compliance and extended thermal margin.

Availability

TPSMB7.5AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power inputs, and telecom line interface designs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 qualified parts.

Supply support for TPSMB7.5AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.

The TPSMB series belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for harsh-environment transient suppression where high-temperature stability, low clamping voltage, and AEC-Q101 compliance are mandatory.

FAQ

What is the clamping voltage of the TPSMB7.5AHM3_A/H at its rated peak pulse current?

The TPSMB7.5AHM3_A/H has a maximum clamping voltage (V_C) of 11.3 V at its rated peak pulse current (I_PPM) of 53.1 A, measured under 10/1000 µs waveform conditions. This value is guaranteed per Vishay's datasheet revision 23-Jan-2024 (Doc. #88406) and reflects worst-case performance at T_A = 25 °C. The TPSMB7.5AHM3_A/H maintains this clamping level across its operational temperature range due to its low temperature coefficient (0.052 %/°C).

Is the TPSMB7.5AHM3_A/H qualified for automotive applications?

Yes, the TPSMB7.5AHM3_A/H is AEC-Q101 qualified, as confirmed in the Vishay datasheet (Document Number 88406, Revision 23-Jan-2024). The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and electrostatic discharge (HBM/MM), making the TPSMB7.5AHM3_A/H suitable for automotive powertrain, body control, and ADAS subsystems.

What does the "HM3" suffix mean in TPSMB7.5AHM3_A/H?

The "HM3" suffix in TPSMB7.5AHM3_A/H indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction per Vishay's ordering nomenclature. It distinguishes this variant from the "HE3" version (RoHS + AEC-Q101 but not halogen-free) and confirms compliance with automotive Tier 1 material restrictions. The "_A/H" denotes revision A in 7" tape-and-reel packaging (750 units per reel), verified in the Ordering Information table on page 3 of the datasheet.

Can the TPSMB7.5AHM3_A/H replace a TPSMB7.5AHE3_A/H in an existing design?

Yes, the TPSMB7.5AHM3_A/H is a direct replacement for TPSMB7.5AHE3_A/H in terms of electrical performance, package (SMB/DO-214AA), pinout, and AEC-Q101 qualification. The only difference is that HM3 adds halogen-free compliance while HE3 does not. No PCB or layout changes are required, and both share identical V_BR, V_C, P_PPM, and thermal ratings. The TPSMB7.5AHM3_A/H satisfies all functional and mechanical requirements of the TPSMB7.5AHE3_A/H.

What is the maximum operating temperature for the TPSMB7.5AHM3_A/H junction?

The TPSMB7.5AHM3_A/H has a maximum junction temperature (T_J) rating of +185 °C, as specified in the Maximum Ratings table (page 1) of the Vishay datasheet (Doc. #88406). This enables continuous operation in high-temperature environments such as engine compartments or industrial enclosures. Derating curves (Fig. 2) show that peak pulse power remains usable up to this limit, with linear reduction above T_A = 25 °C.