Vishay General Semiconductor - Diodes Division P6SMB82A-M3/5B

Overview

P6SMB82A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 70.1 V stand-off voltage (V_WM), 77.9–86.1 V breakdown voltage (V_BR) at 1 mA, 113 V maximum clamping voltage (V_C) at 5.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.

For engineers reviewing the P6SMB82A-M3/5B datasheet, P6SMB82A-M3/5B pinout, P6SMB82A-M3/5B application, or P6SMB82A-M3/5B equivalent, key selection criteria include unidirectional polarity, SMB package thermal resistance (R_θJA = 100 °C/W), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification availability via alternate ordering codes.

Technical Context

This TVS diode operates as a clamping device that remains non-conductive below its 70.1 V stand-off voltage and rapidly transitions to low-impedance conduction above its 77.9–86.1 V breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1 µA at V_WM) and fast response time (<1 ns) to transient events.

The device handles repetitive 10/1000 µs surges up to 600 W at 0.01% duty cycle when mounted on 5.0 mm × 5.0 mm copper pads, with thermal derating above 25 °C per Fig. 2 and maximum junction temperature of 150 °C. It meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ85A-E3/5B and 1.5SMC82A, P6SMB82A-M3/5B offers optimal balance of 70.1 V stand-off accuracy, 113 V clamping headroom, SMB footprint efficiency, and halogen-free compliance - making it preferred for new industrial and automotive designs requiring compact, environmentally compliant surge protection.

Availability

P6SMB82A-M3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom line cards, and consumer appliance motor controls requiring stable component supply and halogen-free compliance.

Supply support for P6SMB82A-M3/5B 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 and application-specific performance.

The P6SMB Series targets high-energy transient suppression in space-constrained applications, with design focus on automotive-grade variants (AEC-Q101), halogen-free compliance, and standardized SMB packaging for automated manufacturing.

FAQ

What is the maximum clamping voltage of P6SMB82A-M3/5B under a 10/1000 µs surge?

The P6SMB82A-M3/5B has a maximum clamping voltage (V_C) of 113 V at 5.3 A peak pulse current under the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88370 and represents the upper voltage limit imposed on protected circuitry during worst-case transient events. The P6SMB82A-M3/5B maintains this clamping performance with ≤1 µA leakage at its 70.1 V stand-off voltage.

Is P6SMB82A-M3/5B suitable for automotive applications?

P6SMB82A-M3/5B itself is not AEC-Q101 qualified, but Vishay offers AEC-Q101 versions under ordering codes such as P6SMB82AHM3_B/I (halogen-free, AEC-Q101). The P6SMB82A-M3/5B shares identical electrical characteristics and SMB package dimensions, making it suitable for non-automotive industrial and consumer applications where qualification is not mandated. For automotive use, specify the HM3_B or HM3_I suffix variants.

What does the "M3" suffix indicate in P6SMB82A-M3/5B?

"M3" denotes halogen-free, RoHS-compliant construction per IPC-1752A and Vishay's material categorization standard (doc?99912). It confirms absence of brominated flame retardants and compliance with EU RoHS Directive 2011/65/EU. The P6SMB82A-M3/5B also meets JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements - critical for lead-free assembly integrity.

How does P6SMB82A-M3/5B differ from bidirectional variants like P6SMB82CA?

P6SMB82A-M3/5B is unidirectional, with polarity marked by a cathode band and intended for DC line protection where surge direction is known (e.g., V_CC-to-ground). In contrast, P6SMB82CA is bidirectional, symmetric in both directions, and used for AC or differential signal lines (e.g., RS-485). The P6SMB82A-M3/5B has no marking on the anode side and must be oriented correctly during placement to avoid forward conduction in normal operation.

What is the thermal resistance of P6SMB82A-M3/5B, and how does it affect layout?

The P6SMB82A-M3/5B 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. This value assumes minimum recommended pad layout per datasheet Figure 6. To maintain junction temperature below 150 °C during repetitive surges, designers must ensure adequate copper area and avoid excessive trace impedance - the P6SMB82A-M3/5B cannot sustain 600 W continuously without thermal derating.