Vishay General Semiconductor - Diodes Division P6SMB36AHM3_A/H

Overview

P6SMB36AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on power and signal lines. It features a 36 V breakdown voltage (V_BR = 34.2–37.8 V at I_T = 1.0 mA), 30.8 V stand-off voltage (V_WM), 49.9 V maximum clamping voltage (V_C) at 12.0 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.

For engineers reviewing the P6SMB36AHM3_A/H datasheet, P6SMB36AHM3_A/H pinout, P6SMB36AHM3_A/H application, or P6SMB36AHM3_A/H equivalent, this part delivers AEC-Q101-qualified transient suppression in SMB (DO-214AA) package with halogen-free RoHS compliance, low incremental surge resistance, and fast response time - critical for ESD and load-switching surge protection in safety-critical embedded systems.

Technical Context

This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation with <1.0 μA leakage at 30.8 V, then rapidly avalanches when transient voltage exceeds V_BR to limit downstream voltage to ≤49.9 V. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.

Thermal performance is defined by R_θJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and R_θJL = 20 °C/W (junction-to-lead), enabling effective heat dissipation during 600 W short-duration pulses. The device is rated for T_J = –65 to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, unidirectional polarity marked by cathode band. Dimensions: 5.59 mm × 3.30 mm × 2.20 mm (L × W × H). Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power derating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ36A-E3/5B and 1.5SMC36AHE3_A, P6SMB36AHM3_A/H uniquely balances AEC-Q101 qualification, 600 W surge capability, and compact SMB footprint - making it optimal for space-constrained automotive modules and industrial edge nodes requiring verified reliability without package redesign.

Availability

P6SMB36AHM3_A/H is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, telecom line cards, and consumer power adapters requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for P6SMB36AHM3_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, efficiency, and application-specific performance.

The P6SMB series was engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping, low leakage, and AEC-Q101 validation in standardized surface-mount packages.

FAQ

What is the maximum clamping voltage of the P6SMB36AHM3_A/H under surge conditions?

The P6SMB36AHM3_A/H has a maximum clamping voltage (V_C) of 49.9 V at 12.0 A peak pulse current (I_PPM) with a 10/1000 μs waveform. This value is measured per JEDEC standards and ensures downstream components see no more than 49.9 V during transient events - critical for protecting 36 V-rated ICs and MOSFETs. The clamping voltage remains stable across its operating temperature range.

Is P6SMB36AHM3_A/H suitable for automotive applications?

Yes, P6SMB36AHM3_A/H is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed rigorous stress tests for temperature cycling, humidity, mechanical shock, and surge endurance required for automotive electronics. It is commonly deployed in engine control units, body control modules, and ADAS sensor power rails where reliability under harsh conditions is mandatory.

What does the "HM3" suffix signify in P6SMB36AHM3_A/H?

The "HM3" suffix in P6SMB36AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3 or M3) and confirms compliance with automotive material and reliability standards - including whisker resistance (JESD 201 Class 2) and moisture sensitivity level (MSL Level 1).

How does the P6SMB36AHM3_A/H compare to bidirectional TVS diodes like P6SMB36CA?

P6SMB36AHM3_A/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., V_IN to GND), offering lower leakage and tighter V_BR tolerance. In contrast, P6SMB36CA is bidirectional and suited for AC or floating signal lines. They are not interchangeable without circuit review - using P6SMB36AHM3_A/H in place of P6SMB36CA would fail to suppress negative transients.

What PCB layout considerations apply to P6SMB36AHM3_A/H for optimal thermal performance?

To achieve rated 600 W pulse power, P6SMB36AHM3_A/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's thermal characterization. Trace width should be ≥20 mils, and thermal vias under pads improve heat transfer. Avoid narrow traces between TVS and protected IC - low-inductance routing preserves fast clamping response.