Vishay General Semiconductor - Diodes Division P6SMB510AHM3_A/I

Overview

P6SMB510AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for high-energy surge protection on DC power rails and signal lines. It features a 485 V minimum breakdown voltage (V_BR), 434 V maximum standoff voltage (V_WM), 600 W peak pulse power rating (10/1000 µs), 0.86 A peak pulse current (I_PPM), and clamps transients to ≤698 V at rated surge. It is used in industrial power supplies and automotive ECUs to protect MOSFETs and microcontrollers from lightning-induced surges.

For engineers reviewing the P6SMB510AHM3_A/I datasheet, P6SMB510AHM3_A/I pinout, P6SMB510AHM3_A/I application, or P6SMB510AHM3_A/I equivalent, key selection criteria include its 434 V working voltage, 698 V clamping voltage at 0.86 A, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and SMB (DO-214AA) package suitability for automated SMT assembly.

Technical Context

This TVS diode operates as a unidirectional clamping device with avalanche breakdown behavior, triggered when reverse voltage exceeds V_BR = 485–535 V. Its low incremental surge resistance ensures stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.

Thermal performance is defined by R_θJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and T_J(max) = +150 °C. The device meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance, supporting lead-free reflow up to 260 °C peak.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band marking on body; anode is unmarked end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ510A, P6SMB510AHM3_A/I delivers 50% higher surge power in the same functional voltage class and adds AEC-Q101 validation; versus SMCJ510A, it reduces board area by 30% while retaining full automotive compliance-critical for ECU and ADAS domain controller layouts.

Availability

P6SMB510AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for P6SMB510AHM3_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, efficiency, and application-specific optimization.

The P6SMB series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness, repeatable clamping, and AEC-Q101 compliance are essential.

FAQ

What is the maximum clamping voltage of the P6SMB510AHM3_A/I at its rated peak pulse current?

The P6SMB510AHM3_A/I has a maximum clamping voltage (V_C) of 698 V at its rated peak pulse current (I_PPM) of 0.86 A under a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88370, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during surge events. The P6SMB510AHM3_A/I maintains this clamping performance across its qualified temperature range.

Is the P6SMB510AHM3_A/I AEC-Q101 qualified, and what does the 'HM3' suffix indicate?

Yes, the P6SMB510AHM3_A/I is AEC-Q101 qualified. The 'HM3' suffix denotes halogen-free, RoHS-compliant construction with full AEC-Q101 stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and ESD-per Vishay's automotive-grade product line. The '_A/I' further specifies packaging in 13-inch tape-and-reel format (3200 units per reel). This makes the P6SMB510AHM3_A/I suitable for under-hood and body-control applications where automotive reliability is mandatory.

What is the standoff voltage (V_WM) of the P6SMB510AHM3_A/I, and how does it relate to system operating voltage?

The P6SMB510AHM3_A/I has a maximum reverse standoff voltage (V_WM) of 434 V, meaning it remains non-conductive with leakage <1 µA up to this DC or RMS voltage. This allows safe integration into 400 V-class systems such as 48 V automotive architectures with margin for ripple and tolerance. Engineers must ensure nominal system voltage plus worst-case tolerance stays below 434 V to prevent premature conduction; the P6SMB510AHM3_A/I is not intended for 600 V bus protection.

Can the P6SMB510AHM3_A/I be used in bidirectional configurations?

No, the P6SMB510AHM3_A/I is a unidirectional TVS diode, as confirmed by its part number suffix 'A' (not 'CA') and datasheet specifications. It conducts only in reverse bias and requires correct polarity placement-cathode to ground, anode to protected line. For bidirectional protection (e.g., AC lines or differential data), a CA-suffixed variant like P6SMB510CAHM3_A/I would be required. Using the P6SMB510AHM3_A/I in reverse polarity risks permanent forward conduction and failure.

What is the thermal resistance and maximum junction temperature specification for the P6SMB510AHM3_A/I?

The P6SMB510AHM3_A/I has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, and a maximum junction temperature (T_J(max)) of +150 °C. These values define its derating envelope: power dissipation must be reduced above 25 °C ambient per Figure 2 in the Vishay datasheet. The P6SMB510AHM3_A/I is rated for continuous operation up to this junction limit, supporting use in sealed enclosures with limited airflow.