The TPSMB18AHE3-5BT is a surface-mount Transient Voltage Suppressor (TVS) diode from Vishay, designed to protect sensitive electronic equipment from voltage transients caused by events like lightning strikes, inductive switching, and electrostatic discharge (ESD). It is part of the TransZorb® series, known for its rapid response time and high surge current capability. The SMB (DO-214AA) package allows for efficient heat dissipation and space-saving designs.

Applications:

• I/O Port Protection: Safeguards input/output ports against voltage surges.
• Data Line Protection: Protects data and signal lines from transient voltages.
• Automotive Applications: Used in automotive control units and other vehicle electronics.
• Industrial Control Systems: Provides surge protection for industrial equipment.
• Power Supply Protection: Protects power supplies and related circuitry.

Features:

• Unidirectional Configuration: Designed for protecting circuits from positive voltage transients.
• Surface Mount Package (SMB/DO-214AA): Suitable for automated assembly and reflow soldering.
• Fast Response Time: Provides quick response to transient voltage events.
• High Surge Capability: Handles high surge currents without degradation.
• Low Clamping Voltage: Limits the voltage across protected components during a surge.

Benefits:

• Enhanced System Reliability: Protects sensitive components from damage due to voltage transients.
• Reduced Downtime: Prevents failures caused by surge events, minimizing downtime.
• Compact Design: The SMB package allows for efficient use of board space.
• Simplified Circuit Design: Provides a simple and effective solution for transient voltage protection.
• Compliance with Industry Standards: Meets relevant industry standards for transient voltage suppression.

Additional Details:

The TPSMB18AHE3-5BT has a stand-off voltage of 18V. It typically has a breakdown voltage around 20V and a maximum clamping voltage of approximately 29.2V at a specified test current. The peak pulse power dissipation is rated at 600W for a 10/1000 µs waveform. The operating temperature range typically spans from -65°C to +150°C. The device is RoHS compliant. Designers should refer to the datasheet for the exact dimensions of the SMB package to ensure correct PCB layout and soldering procedures. As a unidirectional TVS diode, it provides protection against positive voltage transients only. Proper grounding techniques are essential for effective TVS diode operation.