STMicroelectronics

SMA4F13A

SMA4F13A Description

The SMA4F13A from STMicroelectronics is a unidirectional Zener-type TVS diode designed for general-purpose transient voltage suppression in sensitive electronic circuits. Part of the SMA4F, TRANSIL™ series, it offers robust protection with a 13V reverse standoff voltage (Typ) and a minimum breakdown voltage of 14.4V. Its peak pulse power rating of 400W and clamping voltage of 27.2V at 18.6A (10/1000µs pulse) ensure reliable performance against high-energy transients. Packaged in a surface-mount SMAflat form factor, it is optimized for space-constrained applications while complying with ROHS3 and REACH environmental standards.

SMA4F13A Features

• High Surge Handling: 400W peak pulse power dissipation for robust transient protection.
• Precise Voltage Control: Tight clamping (27.2V max) ensures minimal overshoot during surges.
• Compact & Reliable: SMAflat package (Tape & Reel) suits automated assembly with MSL 1 (Unlimited) moisture tolerance.
• Low Leakage: Ideal for power-sensitive designs with a 13V standoff voltage.
• Industry Compliance: EAR99, ROHS3, and REACH Unaffected certifications simplify global deployment.

SMA4F13A Applications

• Consumer Electronics: Protects USB ports, HDMI interfaces, and power rails in TVs/PCs.
• Industrial Systems: Safeguards PLCs, sensors, and 12V/24V DC supply lines from inductive spikes.
• Automotive: Used in infotainment and low-voltage ECUs where ISO 7637-2 compliance is critical.
• Telecom/Networking: Shields RJ45 lines and DC-DC converters from ESD and lightning-induced surges.

Conclusion of SMA4F13A

The SMA4F13A excels in balancing high-power transient suppression with compact design, making it a cost-effective choice for general-purpose circuit protection. While obsolete, its proven reliability in clamping fast transients and broad compatibility with industrial standards ensure continued relevance in legacy and niche applications. Engineers should evaluate alternatives for new designs but can leverage its tested performance in existing systems requiring robust overvoltage defense.