Vishay General Semiconductor - Diodes Division P6SMB13A-M3/5B

Overview

P6SMB13A-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 11.1 V stand-off voltage (V_WM), 12.4–13.7 V breakdown voltage (V_BR) at 1 mA, 18.2 V maximum clamping voltage (V_C) at 33.0 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 P6SMB13A-M3/5B datasheet, P6SMB13A-M3/5B pinout, P6SMB13A-M3/5B application, or P6SMB13A-M3/5B equivalent, this part delivers verified transient suppression performance in compact SMB packaging, with halogen-free RoHS compliance, MSL Level 1 rating, and AEC-Q101 qualification available under alternate suffixes - critical for automotive and high-reliability embedded designs.

Technical Context

The P6SMB13A-M3/5B operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (12.4–13.7 V), then clamping transient energy within 18.2 V at 33.0 A. Its glass-passivated junction ensures stable leakage (<5 µA at V_WM) and fast response time (<1 ns).

Thermal design relies on low R_θJA = 100 °C/W and R_θJL = 20 °C/W, enabling operation up to +150 °C junction temperature. The device is rated for 100 A non-repetitive forward surge (8.3 ms half-sine) and dissipates 5.0 W continuously on infinite heatsink at 50 °C ambient.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ13A and 1.5SMC13A, the P6SMB13A-M3/5B uniquely combines 600 W surge rating, 18.2 V clamping, SMB footprint, and halogen-free RoHS compliance - making it optimal for high-density, high-reliability industrial and automotive PCBs where thermal margin, layout compatibility, and environmental compliance are jointly constrained.

Availability

P6SMB13A-M3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, consumer DC adapters, and telecom PoE equipment requiring stable component supply with halogen-free compliance and MSL Level 1 reflow readiness.

Supply support for P6SMB13A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The P6SMB Series targets board-level transient suppression in space-constrained, high-volume applications - engineered for robustness in automotive, industrial, and telecom environments with validated AEC-Q101 variants and tight parametric control.

FAQ

What is the maximum clamping voltage of the P6SMB13A-M3/5B under standard test conditions?

The P6SMB13A-M3/5B has a maximum clamping voltage (V_C) of 18.2 V when subjected to a 10/1000 µs waveform at 33.0 A peak pulse current. This value is measured per JEDEC standards and reflects the highest voltage the protected circuit will experience during a defined transient event - critical for ensuring downstream components remain within their absolute maximum ratings. The P6SMB13A-M3/5B maintains this clamping performance across its specified operating temperature range.

Is the P6SMB13A-M3/5B suitable for automotive applications?

Yes - the P6SMB13A-M3/5B is halogen-free and RoHS-compliant, and its base P6SMB13A family offers AEC-Q101 qualified variants (e.g., P6SMB13AHM3_B). While the -M3/5B suffix itself is commercial-grade, it shares identical electrical and thermal characteristics with qualified versions, enabling direct qualification path for automotive sensor and body-control modules. The P6SMB13A-M3/5B supports junction temperatures up to +150 °C and meets MSL Level 1 reflow requirements.

What does the "M3" suffix indicate in P6SMB13A-M3/5B?

The "M3" suffix in P6SMB13A-M3/5B denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations. It specifies matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, plus JESD 201 Class 2 whisker resistance. This distinguishes it from "E3" (RoHS-compliant but not halogen-free) and "HM3" (halogen-free + AEC-Q101 qualified). The P6SMB13A-M3/5B is optimized for environmentally regulated industrial and consumer deployments.

How does the P6SMB13A-M3/5B compare to bidirectional TVS diodes like P6SMB13CA?

The P6SMB13A-M3/5B is unidirectional and intended for DC line protection where polarity is fixed (e.g., V_CC-to-ground), offering lower leakage (<5 µA at V_WM) and tighter V_BR tolerance. In contrast, P6SMB13CA is bidirectional, suited for AC or floating signal lines (e.g., RS-485), but exhibits higher leakage and symmetric breakdown in both directions. The P6SMB13A-M3/5B cannot replace P6SMB13CA in AC-coupled applications without circuit redesign.

What is the thermal resistance profile of the P6SMB13A-M3/5B?

The P6SMB13A-M3/5B 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, measured on standard 0.2" × 0.2" copper pads. These values enable reliable operation at +150 °C junction temperature under 5.0 W continuous power dissipation at 50 °C ambient - essential for thermally dense layouts. Derating curves in the P6SMB13A-M3/5B datasheet confirm usable power margins across industrial temperature ranges.