The SMCJ30CA is a surface-mount Transient Voltage Suppressor (TVS) diode from Littelfuse, designed to protect sensitive electronic components from voltage transients induced by lightning, electrostatic discharge (ESD), inductive load switching, and other transient voltage events. This specific part is a bidirectional TVS diode, meaning it provides overvoltage protection in both directions.

Applications

• Protection of I/O Interfaces
• AC/DC Power Supplies
• Data Lines
• Microcontroller Protection
• Telecommunication Equipment
• Industrial Control Systems

Features

• Surface Mount Package: Allows for automated assembly and efficient use of board space.
• Bidirectional: Protects against both positive and negative transient voltages.
• 3000W Peak Pulse Power Capability: Provides robust protection against high-energy transients.
• Glass Passivated Chip Junction: Offers reliable performance and stability.
• Typical IR less than 1μA Above 10V: Low leakage current minimizes power consumption.
• Fast Response Time: Responds almost instantaneously to transient voltage events.
• Excellent Clamping Capability: Limits the peak voltage seen by the protected circuit.
• RoHS Compliant: Meets environmental standards for hazardous substances.

Benefits

• Enhanced System Reliability: Prevents damage to sensitive components from voltage transients, increasing the overall reliability of the system.
• Reduced Downtime: Minimizes equipment downtime caused by transient voltage events.
• Improved Product Lifespan: Protects electronic circuits from stress caused by overvoltage conditions, extending the lifespan of the product.
• Simplified Design: Easier to implement protection scheme compared to other methods.
• Cost-Effective Solution: Provides a cost-effective solution for transient voltage protection.

Additional Details

The SMCJ30CA has a standoff voltage of 30V and a breakdown voltage typically around 33.3V. The clamping voltage is designed to limit the voltage across the protected component to a safe level during a transient event. The device is packaged in an SMC (DO-214AB) package, suitable for surface mounting on printed circuit boards. Operating temperature ranges from -65°C to +150°C. The peak pulse current (Ipp) is related to the peak pulse power rating. Detailed electrical characteristics, including forward voltage and reverse leakage, can be found in the Littelfuse datasheet.