Vishay General Semiconductor - Diodes Division TPSMA10AHE3_A/I

Overview

TPSMA10AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMA (DO-214AC) package, designed to protect sensitive electronics against 10/1000 μs surge transients up to 400 W peak pulse power. It features a 10.0 V nominal breakdown voltage (V_BR), 8.65 V stand-off voltage (V_WM), and clamps to ≤27.6 V at 14.5 A peak pulse current - used for safeguarding MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.

For engineers reviewing the TPSMA10AHE3_A/I datasheet, TPSMA10AHE3_A/I pinout, TPSMA10AHE3_A/I application, or TPSMA10AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C maximum junction temperature, unidirectional polarity, low 0.064 %/°C V_BR temperature coefficient, and compliance with J-STD-020 MSL Level 1 reflow profile.

Technical Context

This TVS diode employs passivated anisotropic rectifier technology optimized for high-reliability operation under thermal stress. Its 185 °C junction rating enables deployment in under-hood automotive environments and high-temperature industrial PCBs without derating penalties beyond those defined in Figure 2 of the datasheet.

The device delivers stable clamping performance across temperature due to its low ±0.064 %/°C V_BR temperature coefficient and exhibits fast response time (<1 ns) to transient events. It is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and maintains <5.0 μA reverse leakage at V_WM up to 150 °C.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode indicated by color band. Terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102, qualified to JESD 201 Class 2 whisker test.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ10A and 1.5SMC10A, the TPSMA10AHE3_A/I uniquely combines AEC-Q101 qualification, 185 °C junction rating, and compact SMA footprint - making it optimal for space-constrained, high-reliability automotive and industrial designs where thermal robustness and qualification traceability are mandatory.

Availability

TPSMA10AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, consumer USB power delivery systems, and telecom DC input stages requiring stable component supply with full AEC-Q101 traceability and RoHS/halogen-free compliance.

Supply support for TPSMA10AHE3_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 reliability, thermal performance, and automotive qualification.

The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) family, engineered specifically for high-temperature transient suppression in harsh environments - targeting automotive powertrain, ADAS, and industrial motor control applications.

FAQ

What is the exact breakdown voltage tolerance for TPSMA10AHE3_A/I?

The TPSMA10AHE3_A/I has a guaranteed breakdown voltage (V_BR) range of 9.50 V to 10.50 V at 1.0 mA test current, with a nominal value of 10.0 V. This ±5 % tolerance is verified per the Electrical Characteristics table in Vishay document 88405 and applies across the full operating temperature range when adjusted using the published temperature coefficient of +0.064 %/°C.

Is TPSMA10AHE3_A/I suitable for bidirectional transient protection?

No, the TPSMA10AHE3_A/I is strictly unidirectional - it conducts only when the cathode is positive relative to the anode. For bidirectional protection, a pair of TPSMA10AHE3_A/I devices in series opposition or a dedicated bidirectional TVS such as TPSMA10CA must be used. The datasheet explicitly states "Available in uni-directional polarity only" for this part number.

Does TPSMA10AHE3_A/I meet lead-free and halogen-free requirements?

Yes, the HE3 suffix indicates RoHS-compliant construction and AEC-Q101 qualification. While not halogen-free (that designation applies to HM3 suffix variants), TPSMA10AHE3_A/I meets JEDEC JS709C and IPC-1752A for lead-free assembly and contains no intentionally added halogens above threshold limits per IEC 61249-2-21.

What is the maximum allowable PCB pad size for thermal performance of TPSMA10AHE3_A/I?

Vishay specifies a minimum pad layout of 0.2" × 0.2" (5.0 mm × 5.0 mm) copper area per terminal for rated 400 W pulse power dissipation. Larger pads improve thermal spreading and surge survivability but are not required for baseline specification compliance. Pad dimensions must maintain ≥0.074" (1.88 mm) clearance between terminals per the package outline drawing.

Can TPSMA10AHE3_A/I replace SMAJ10A in an existing design without layout changes?

Yes - TPSMA10AHE3_A/I shares identical SMA (DO-214AC) mechanical dimensions, pinout, and solder footprint with SMAJ10A. However, due to its higher 185 °C junction rating and AEC-Q101 qualification, it may require updated reliability documentation and thermal validation if deployed in automotive applications previously using SMAJ10A.