Vishay General Semiconductor - Diodes Division P6SMB7.5AHE3/52

Overview

P6SMB7.5AHE3/52 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 7.5 V breakdown voltage (V_BR = 7.13–7.88 V at 10 mA), 6.4 V stand-off voltage (V_WM), 11.3 V clamping voltage (V_C) at 53.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rails.

For engineers reviewing the P6SMB7.5AHE3/52 datasheet, P6SMB7.5AHE3/52 pinout, P6SMB7.5AHE3/52 application, or P6SMB7.5AHE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, SMB (DO-214AA) package compatibility, unidirectional polarity with cathode band marking, and verified clamping performance under repetitive surge conditions per JESD22-B102 and J-STD-020 MSL level 1.

Technical Context

The P6SMB7.5AHE3/52 operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response (<1 ns) to transient events while maintaining low incremental surge resistance. Its thermal design supports operation up to +150 °C junction temperature, with R_θJA = 100 °C/W and R_θJL = 20 °C/W on standard 0.2" × 0.2" copper pads.

It meets AEC-Q101 stress testing requirements for automotive applications and complies with RoHS and halogen-free standards (HE3 suffix). The device is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits a V_BR temperature coefficient of +0.061 %/°C - enabling stable clamping across wide ambient ranges.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band on one end; polarity-critical for unidirectional operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ7.5A and 1.5SMC7.5A, the P6SMB7.5AHE3/52 delivers AEC-Q101 assurance in the smallest standard SMB footprint while maintaining optimal clamping efficiency (V_C/V_BR = 1.49), making it the preferred choice for space-constrained automotive and industrial designs requiring validated reliability.

Availability

P6SMB7.5AHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial DC power rails, and consumer power adapter outputs requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for P6SMB7.5AHE3/52 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.

The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for consistent clamping performance, low leakage, and robust surge endurance in compact SMB packages.

FAQ

What is the clamping voltage of the P6SMB7.5AHE3/52 at its rated peak pulse current?

The P6SMB7.5AHE3/52 has a maximum clamping voltage (V_C) of 11.3 V at 53.1 A peak pulse current (I_PPM) under a 10/1000 µs waveform. This value is measured per JEDEC standards and ensures protected circuits remain below critical voltage thresholds during surge events. The P6SMB7.5AHE3/52 maintains this clamping performance across its full operating temperature range.

Is the P6SMB7.5AHE3/52 qualified for automotive applications?

Yes, the P6SMB7.5AHE3/52 carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. This makes the P6SMB7.5AHE3/52 suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is mandatory.

What is the standoff voltage (V_WM) and why does it matter for the P6SMB7.5AHE3/52?

The P6SMB7.5AHE3/52 has a maximum reverse standoff voltage (V_WM) of 6.4 V, meaning it remains in high-impedance state with leakage <500 µA up to that voltage. This ensures no interference with normal 5 V or 6 V logic/sensor signals while providing headroom before avalanche onset. Selecting a V_WM correctly avoids false triggering and preserves signal integrity - a key design consideration for the P6SMB7.5AHE3/52 in low-voltage interfaces.

Does the P6SMB7.5AHE3/52 have polarity markings, and how is it oriented on the PCB?

Yes, the P6SMB7.5AHE3/52 is unidirectional and marked with a cathode band on the SMB (DO-214AA) package body. During PCB layout, the banded end must connect to the line being protected (e.g., 12 V rail), while the anode connects to ground or return. Incorrect orientation prevents clamping action and may cause catastrophic failure during transients - proper placement is essential for the P6SMB7.5AHE3/52 to function as intended.

What is the thermal resistance and maximum junction temperature specification for the P6SMB7.5AHE3/52?

The P6SMB7.5AHE3/52 has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W and junction-to-lead resistance (R_θJL) of 20 °C/W when mounted on 0.2" × 0.2" copper pads. Its maximum operating junction temperature is +150 °C, supporting use in high-ambient environments such as engine control units or industrial enclosures. These thermal parameters directly impact sustained surge capability and must be considered in the P6SMB7.5AHE3/52's thermal design.