Vishay General Semiconductor - Diodes Division SMA6F13A-M3/6A

Overview

SMA6F13A-M3/6A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features 13 V stand-off voltage (VWM), 14.4–15.9 V breakdown voltage (VBR), 20.4 V maximum clamping voltage at 29.4 A (10/1000 μs), 600 W peak pulse power, and IEC 61000-4-2 Level 4 ESD protection (15 kV air / 8 kV contact).

For engineers reviewing the SMA6F13A-M3/6A datasheet, SMA6F13A-M3/6A pinout, SMA6F13A-M3/6A application, or SMA6F13A-M3/6A equivalent, this device is selected for robust overvoltage protection in space-constrained consumer, industrial, and telecom systems where low-profile mounting and high surge immunity are required.

Technical Context

The SMA6F13A-M3/6A operates as a Zener-based unidirectional TVS diode with sharp avalanche breakdown behavior, enabling fast response (<1 ns) to transient events. Its clamping performance is defined by dynamic resistance (RD = 0.153 Ω) and junction temperature coefficient (αT = 8.4 × 10⁻⁴ /°C), ensuring stable VBR across operating range (−55 °C to +175 °C).

Thermal design relies on low thermal resistance: RθJA = 120–150 °C/W (FR4 PCB, 2 oz.), RθJM = 12–15 °C/W (junction-to-mount), supporting continuous operation up to 8 W at 55 °C ambient. The device meets MSL Level 1 per J-STD-020 and uses matte tin-plated leads compliant with J-STD-002 and JESD22-B102.

Key Specifications

Pinout & Package

SlimSMA (DO-221AC) package: surface-mount, single-axis cathode band marking, 2-terminal configuration. Dimensions: 4.15–4.35 mm length × 2.50–2.70 mm width × 0.95 mm height. Matte tin-plated leads ensure solderability and whisker resistance (JESD201 Class 2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS diode applications.

Compared with SMA6F13A-M3/6A, SMA6F13AHE3/61 adds automotive qualification at no electrical trade-off but higher cost, while P6SMB13A offers identical protection in a taller, legacy SMB package-making SMA6F13A-M3/6A optimal for height-critical, non-automotive applications requiring best-in-class profile and manufacturability.

Availability

SMA6F13A-M3/6A is available at Aetrix Electronics and suitable for USB-C power delivery interfaces, industrial PLC digital inputs, automotive body control modules, telecom Ethernet PHY ports, and consumer appliance power rails requiring stable component supply with consistent SlimSMA packaging and M3/6A tape-and-reel delivery.

Supply support for SMA6F13A-M3/6A 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, MOSFETs, and optoelectronics with emphasis on high-reliability, high-efficiency, and application-specific solutions.

The SMA6FxxA family delivers compact, high-power transient suppression for space-constrained power and signal lines across consumer, industrial, telecom, and automotive markets-designed specifically to replace bulkier DO-214 packages without sacrificing surge capability.

FAQ

What is the maximum clamping voltage of the SMA6F13A-M3/6A under a 10/1000 μs surge?

The SMA6F13A-M3/6A has a maximum clamping voltage (VC) of 20.4 V at 29.4 A for a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C) and ensures protected circuits remain below critical overvoltage thresholds during common industrial and automotive transients. The SMA6F13A-M3/6A achieves this with a dynamic resistance of 0.153 Ω, contributing to predictable voltage limiting behavior.

Does the SMA6F13A-M3/6A meet automotive qualification standards?

The SMA6F13A-M3/6A is not AEC-Q200 qualified; it is rated for industrial and commercial applications. For automotive use, Vishay offers the pin-compatible SMA6F13AHE3/61 variant, which carries full AEC-Q200 qualification and enhanced reliability testing. The SMA6F13A-M3/6A itself supports operation from −55 °C to +175 °C junction temperature but lacks the documentation and process controls required for automotive qualification.

What is the thermal resistance of the SMA6F13A-M3/6A when mounted on a standard FR4 PCB?

When mounted on a standard FR4 PCB with 2 oz. copper and the recommended footprint, the SMA6F13A-M3/6A exhibits a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, with a maximum of 150 °C/W. This value enables 8 W power dissipation at 55 °C ambient, as specified in the Vishay datasheet Document Number 89458. The SMA6F13A-M3/6A's SlimSMA package contributes to this performance via optimized thermal pad geometry and low-mass construction.

Can the SMA6F13A-M3/6A be used for bidirectional transient protection?

No, the SMA6F13A-M3/6A is strictly unidirectional and must be used with correct polarity-cathode connected to the line being protected, anode to ground or lower potential. Bidirectional protection requires a symmetric device such as the SMA6F13CA series. Using SMA6F13A-M3/6A in reverse orientation will result in forward conduction and failure; its datasheet explicitly states "Unidirectional only" under FEATURES.

What is the ESD rating of the SMA6F13A-M3/6A and how is it verified?

The SMA6F13A-M3/6A is rated to IEC 61000-4-2 Level 4: 15 kV for air discharge and 8 kV for contact discharge. This rating is verified per the standard test methodology using a 150 pF capacitor and 330 Ω resistor network, and is documented in the Vishay datasheet (Document Number 89458, page 3). The SMA6F13A-M3/6A achieves this through optimized junction design and passivation, making it suitable for direct integration into ESD-sensitive interface paths without additional protection stages.