STMicroelectronics

SM30T33AY

SM30T33AY Description

The SM30T33AY from STMicroelectronics is a high-performance unidirectional TVS (Transient Voltage Suppression) diode designed for robust automotive-grade transient protection. Part of the SM30TY, TRANSIL™ series, it features a 28V reverse standoff voltage (Typ) and a 31.1V minimum breakdown voltage, ensuring reliable clamping of transient surges up to 45.4V at peak pulse current (Ipp). With a 3kW peak pulse power rating and 66.1A peak pulse current (10/1000µs), it excels in dissipating high-energy transients while maintaining low clamping voltage. Packaged in SMC (Surface Mount Chip) and compliant with ROHS3 and REACH standards, it is ideal for surface-mount applications requiring AEC-Q101 qualified components.

SM30T33AY Features

• Automotive Grade: Meets stringent reliability requirements for automotive electronics.
• High Power Handling: 3000W peak pulse power (3kW) for superior transient suppression.
• Low Clamping Voltage: 45.4V max clamping voltage at Ipp ensures minimal stress on protected circuits.
• Fast Response: Rapid reaction to transient events (sub-nanosecond response time).
• Robust Packaging: SMC (DO-214AB) package for high thermal and mechanical endurance.
• Compliance: ROHS3, REACH Unaffected, ECCN EAR99, and MSL 1 (Unlimited) for broad applicability.

SM30T33AY Applications

• Automotive Systems: Protects ECUs, CAN buses, infotainment, and ADAS from load dump, ESD, and EMI.
• Industrial Electronics: Safeguards sensors, PLCs, and power supplies against voltage spikes.
• Telecom/Networking: Shields PoE, routers, and base stations from lightning-induced surges.
• Consumer Electronics: Used in USB ports, HDMI interfaces, and battery management systems.

Conclusion of SM30T33AY

The SM30T33AY stands out as a high-reliability TVS diode for automotive and industrial applications, combining high power dissipation, low clamping voltage, and AEC-Q101 compliance. Its SMC package and 3kW surge capability make it a preferred choice for designers needing robust transient protection in space-constrained, high-reliability systems. Ideal for ISO 7637-2 and ISO 16750-2 compliant designs, it ensures long-term durability in harsh environments.