STMicroelectronics SMA6F130A

Overview

SMA6F130A from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for high-reliability surge protection in power supply rails and signal lines. It features a 130 V stand-off voltage (VRM), 152 V minimum breakdown voltage (VBR), 209 V maximum clamping voltage (VCL) at 1 A IPP, and operates up to 175 °C junction temperature.

For engineers reviewing the SMA6F130A datasheet, SMA6F130A pinout, SMA6F130A application, or SMA6F130A equivalent, key selection criteria include clamping performance under 10/1000 µs surges, low leakage (<0.2 µA at 25 °C), thermal robustness at Tj = 175 °C, and compliance with IEC 61000-4-2 Level 4 ESD immunity (±25 kV contact / ±30 kV air).

Technical Context

The SMA6F130A uses planar silicon avalanche technology to deliver precise, repeatable clamping response during fast transients. Its unidirectional configuration enables integration into DC-biased circuits without reverse conduction path concerns, and its low dynamic resistance (7 Ω) ensures minimal voltage overshoot under high peak pulse currents (up to 265 A for 8/20 µs pulses).

Designed for long-term stability in harsh environments, it maintains specified electrical characteristics across -55 °C to +175 °C operating junction temperature, with voltage temperature coefficient αT = 10.8 × 10⁻⁴ /°C enabling accurate VBR and VCL derating calculations over temperature.

Key Specifications

Pinout & Package

The SMA6F130A is housed in an industry-standard SMA (DO-214AC) flat package with matte tin-plated leads, compliant with IPC7531 footprint and JEDEC MO-136AA outline. Dimensions: 4.5 mm × 2.7 mm × 2.2 mm (L × W × H), weight 39 mg.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMA6F130A, the SMA6F130A-TP offers near-identical specs at lower cost but trades off leakage performance, while P6SMB130A provides broader VBR tolerance at the expense of clamping precision-making ST's version optimal for high-reliability 209 V-limited systems.

Availability

SMA6F130A is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, telecom power supply inputs, and renewable energy inverter DC link monitoring requiring stable component supply across extended temperature and surge stress conditions.

Supply support for SMA6F130A 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.

The SMA6F Transil series targets high-reliability transient suppression in thermally demanding environments, emphasizing low leakage, high Tj capability, and precise clamping for mission-critical power and signal line protection.

FAQ

What is the maximum clamping voltage of SMA6F130A under a 10/1000 µs surge?

The maximum clamping voltage (VCL) is 209 V at 1 A peak pulse current for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature per the αT coefficient (10.8 × 10⁻⁴ /°C), reaching ~225 V at Tj = 125 °C using the derating formula VCL(Tj) = VCL(25°C) × [1 + αT × (Tj − 25)].

Can SMA6F130A be used in bidirectional configurations?

No - SMA6F130A is a unidirectional TVS diode, intended for DC-biased circuits where reverse conduction is not required. For bidirectional protection, ST offers the SMA6F130CA variant; substituting the 'A' version in AC-coupled or floating applications risks failure due to lack of reverse avalanche capability.

What is the thermal resistance junction-to-ambient for SMA6F130A on standard FR4 PCB?

On a standard FR4 board with 35 µm copper thickness and the recommended footprint, the thermal resistance junction-to-ambient (Rth(j-a)) is approximately 120 °C/W for a single pulse. This value improves significantly with added copper area: adding 2 cm² of copper under each lead reduces Rth(j-a) to ~50 °C/W, supporting sustained high-power surge handling.

Does SMA6F130A meet automotive AEC-Q200 stress testing requirements?

No - SMA6F130A is not AEC-Q200 qualified. While it operates up to 175 °C junction temperature and meets IEC 61000-4-2 ESD standards, it lacks the full qualification test suite (e.g., temperature cycling, humidity bias, mechanical shock) required for automotive-grade components. For AEC-Q200-compliant alternatives, consider ST's Automotive Transil series such as SMAJ130A-Q.