The SM712.TCT TVS Diode from Semtech is a transient voltage suppression component designed to provide reliable protection for RS-485 communication interfaces. It offers asymmetrical protection for +12V and -7V lines, safeguarding sensitive electronic equipment against voltage transients caused by Electrostatic Discharge (ESD), Electrical Fast Transients (EFT), and lightning surges.

With a peak pulse power handling capability of over 500W (8/20 µs waveform), the SM712 provides effective protection in extended common-mode applications. Its low clamping voltage helps minimize electrical stress on connected transceivers, improving system reliability and protecting sensitive circuit components.

The SM712.TCT integrates two 12V and two 7V TVS diodes into a single compact SOT-23 package, replacing four discrete protection components. This integrated design reduces PCB component requirements and helps minimize voltage overshoot caused by trace inductance.

Key Features & Benefits

• Asymmetrical Voltage Protection: Supports +12V and -7V lines.

• High Surge Handling: Peak pulse power of over 500W (8/20 µs waveform).

• Low Clamping Voltage: 19V to 26V to help protect sensitive transceivers.

• Multi-Protection: Guards against ESD, EFT, and lightning-induced transients.

• Integrated Design: Combines four TVS diodes in one package.

• Compact Package: Space-saving SOT-23 package.

• Improved Reliability: Helps reduce voltage overshoot and electrical stress in RS-485 interfaces.

Technical Specifications

Applications

• RS-485 Communication Interfaces

• Industrial Automation Systems

• Multi-Point Data Transmission Networks

• Industrial Control Equipment

• Communication and Networking Devices

• Electronic Circuit Surge Protection