STMicroelectronics SMA4F130A

Overview

SMA4F130A from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for high-reliability surge protection in power and signal lines. It features a 130 V stand-off voltage (VRM), 160 V maximum clamping voltage (VCL) at 265 A peak pulse current (IPP), 400 W peak pulse power (10/1000 µs), and operates up to 175 °C junction temperature - ideal for industrial power supply input stages and telecom line interfaces.

For engineers reviewing the SMA4F130A datasheet, SMA4F130A pinout, SMA4F130A application, or SMA4F130A equivalent, key selection criteria include clamping performance under IEC 61000-4-2 Level 4 ESD (±25 kV contact / ±30 kV air), low leakage (<0.2 µA @ 25 °C), dynamic resistance (11.7 Ω), and compatibility with SMA flat package reflow profiles per J-STD-020 MSL level 1.

Technical Context

The SMA4F130A employs planar silicon avalanche technology to deliver precise breakdown behavior with tight VBR tolerance (144–160 V) and predictable temperature coefficient (αT = 10.8 × 10⁻⁴ /°C). Its unidirectional configuration supports DC-biased protection paths without reverse conduction during normal operation.

Clamping response is defined by dynamic resistance (RD = 11.7 Ω) and follows VCL = VBR(max) + RD × IPP, enabling accurate overvoltage prediction under standardized 8/20 µs and 10/1000 µs transients. Thermal design leverages low thermal impedance (Zth(j-a) < 100 °C/W on FR4) and rated 200 W power dissipation at Tj = 175 °C.

Key Specifications

Pinout & Package

The SMA4F130A is housed in an industry-standard SMA (DO-214AC) flat package with matte tin-plated leads, JEDEC registered outline, and IPC7531-compliant footprint. Dimensions: D = 2.25–2.90 mm, E = 5.00–5.35 mm, E1 = 3.95–4.60 mm, L = 0.75–1.20 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ130A and SMBJ130A, the SMA4F130A delivers the lowest clamping voltage (209 V) and tightest VBR tolerance (144–160 V) in SMA form factor - making it optimal for voltage-critical 120–150 VDC systems where minimal overshoot is mandatory.

Availability

SMA4F130A is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom line interface hardening, automotive body control modules, and smart meter communication ports requiring stable component supply across multi-year production cycles.

Supply support for SMA4F130A 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, specializing in power management, analog, MEMS, and microcontrollers - serving automotive, industrial, and consumer markets with scalable, high-reliability solutions.

The SMA4F Transil series targets high-temperature, low-leakage transient protection for mission-critical DC power rails and signal lines - emphasizing planar process consistency, JEDEC-compliant packaging, and IEC/UL-certified surge robustness.

FAQ

What is the maximum peak pulse current (IPP) the SMA4F130A can handle?

The SMA4F130A sustains 1.9 A peak pulse current (IPP) under 10/1000 µs waveform at 209 V clamping voltage, and 9 A under 8/20 µs waveform at 265 V clamping voltage. These values are measured per IEC 61000-4-5 definitions and confirmed in Table 2 of DS12542 Rev 1, with derating applied above 25 °C ambient per Figure 3.

Does the SMA4F130A meet automotive AEC-Q200 requirements?

No - the SMA4F130A is not AEC-Q200 qualified. It is rated for industrial and telecom applications with Tj up to 175 °C and complies with IEC 61000-4-2/4-5, UL94 V0, and J-STD-020 MSL level 1. For automotive-grade TVS diodes, ST offers the SMA6F and SMA8F families with full AEC-Q200 qualification.

How does the 10.8 × 10⁻⁴ /°C voltage temperature coefficient affect clamping performance?

The αT = 10.8 × 10⁻⁴ /°C means VBR increases by ~0.14 V/°C above 25 °C. At 125 °C, VBR rises ~14 V - shifting clamping threshold upward. This is accounted for in VCL calculation via VCL(Tj) = VCL(25°C) × [1 + αT × (Tj − 25)], ensuring predictable protection across full operating range.

Can the SMA4F130A be used in bidirectional configurations?

No - the SMA4F130A is strictly unidirectional (Type A). Its anode-cathode asymmetry prevents reverse conduction. For bidirectional protection, ST recommends the SMA4F130CA variant (center-tapped, symmetric clamping), or discrete back-to-back SMA4F130A pairs with appropriate layout isolation.