The VDZFST4R8.2B is a transient voltage suppressor (TVS) diode manufactured by Rohm Semiconductor. It is designed to protect sensitive electronic components from voltage surges and electrostatic discharge (ESD). This diode offers a fast response time and low clamping voltage, making it suitable for protecting various electronic circuits.

Applications

• Data lines protection in communication equipment.
• I/O ports protection in microcontrollers and microprocessors.
• Power supply protection in electronic devices.
• Automotive electronics protection against transients.
• Consumer electronics protection like smartphones, tablets, and laptops.

Features

• Unidirectional TVS diode: Provides protection against positive voltage transients.
• Low clamping voltage: Limits the voltage across the protected component during a surge event.
• Fast response time: Quickly responds to transient events, ensuring effective protection.
• Small surface mount package: Allows for compact designs and easy integration.
• High surge capability: Can withstand high surge currents without failure.

Benefits

• Enhanced circuit reliability: Protects sensitive components from damage due to voltage surges.
• Reduced downtime: Minimizes the risk of equipment failure caused by transient events.
• Improved product lifespan: Extends the life of electronic devices by preventing damage from ESD and surges.
• Cost-effective protection: Provides a simple and affordable solution for surge protection.
• Compact design: Allows for integration into space-constrained applications.

Additional Details

The VDZFST4R8.2B has a standoff voltage of 4.8V and a breakdown voltage typically around 5.3V. It comes in a small surface mount package (SOD-523). It is RoHS compliant. The clamping voltage at a specified surge current is a crucial parameter for determining its effectiveness in protecting downstream components. This device is typically used in applications where a low voltage rail needs to be protected from ESD or other transient voltage spikes. The specific surge current capability will depend on the test waveform (e.g., IEC 61000-4-2 for ESD, IEC 61000-4-5 for surge) and is usually detailed in the datasheet.