STMicroelectronics

SM15T18AY

SM15T18AY Description

The SM15T18AY from STMicroelectronics is an automotive-grade unidirectional TVS diode (Transient Voltage Suppressor) designed for robust transient voltage protection in demanding environments. Part of the SM15TY, TRANSIL™ series, it features a 15.3V reverse standoff voltage (typical) and a 17.1V minimum breakdown voltage, ensuring reliable clamping of transient surges. With a peak pulse power rating of 1500W (1.5kW) and a clamping voltage of 32.5V at 308A (8/20µs), it excels in dissipating high-energy transients. Packaged in SMC (Surface-Mount Case) and supplied in Tape & Reel (TR), it is optimized for surface-mount assembly in high-volume applications.

SM15T18AY Features

• Automotive-Grade Compliance: Meets stringent automotive reliability standards, making it ideal for vehicle electronics.
• High Power Handling: 1500W peak pulse power (8/20µs) ensures robust protection against lightning strikes, ESD, and inductive load switching.
• Low Clamping Voltage: 32.5V max at 308A minimizes stress on protected circuits.
• Fast Response Time: Rapid reaction to transients, safeguarding sensitive components.
• RoHS3 & REACH Compliant: Environmentally friendly and suitable for global markets.
• MSL 1 (Unlimited): No moisture sensitivity concerns during storage or assembly.

SM15T18AY Applications

• Automotive Systems: Protects ECUs, CAN buses, infotainment, and ADAS from load-dump and ISO 7637-2 transients.
• Industrial Electronics: Shields PLC I/Os, sensors, and power supplies from voltage spikes.
• Telecom/Networking: Safeguards 5G infrastructure, routers, and base stations against surges.
• Consumer Electronics: Used in USB ports, HDMI interfaces, and power management circuits.

Conclusion of SM15T18AY

The SM15T18AY stands out for its high power dissipation, low clamping voltage, and automotive-grade reliability, making it a top choice for transient protection in harsh environments. Its SMC package and surface-mount compatibility streamline integration into modern PCB designs. Whether for automotive, industrial, or telecom applications, this TVS diode delivers superior performance and durability compared to standard alternatives.