The P3500BA70 is a silicon bidirectional thyristor (SIDAC) manufactured by Teccor Electronics (now part of Littelfuse). SIDACs are switching devices that exhibit a negative resistance characteristic, meaning that once the breakover voltage is reached, the device rapidly switches to a low-impedance state. They are commonly used in high-voltage protection circuits, solid-state lighting, and other applications where a fast and reliable switching action is required. The P3500BA70 is designed for applications requiring high surge current capability and precise voltage breakdown characteristics.

Applications:

• High-Voltage Protection: Used in telecom and data communication equipment for overvoltage protection.
• Solid-State Lighting: Employed in HID lamp igniters and other lighting systems.
• Gas Discharge Tube (GDT) Replacement: Provides a solid-state alternative to GDTs in surge protection circuits.
• Electronic Ballasts: Utilized in electronic ballasts for fluorescent lamps.
• Ignition Circuits: Found in ignition systems for automotive and industrial applications.

Features:

• Bidirectional Switching: Conducts current in both directions.
• High Surge Current Capability: Withstands high surge currents without damage.
• Precise Breakover Voltage: Switches rapidly at a specific voltage threshold.
• Low On-State Voltage: Minimizes power dissipation during conduction.
• Fast Switching Speed: Provides rapid switching action for quick response to overvoltage events.

Benefits:

• Overvoltage Protection: Protects sensitive electronic components from damage due to overvoltage events.
• Reliable Switching: Provides consistent and reliable switching performance.
• High Surge Immunity: Withstands high surge currents without degradation.
• Long Lifespan: Solid-state design ensures a long operational life.
• Compact Design: Allows for use in space-constrained applications.

Additional Details:

The P3500BA70 features a breakover voltage of approximately 70V (as suggested by the part number suffix) and is designed to handle surge currents up to several hundred amps. The low on-state voltage minimizes power dissipation during conduction, improving energy efficiency. The device is typically packaged in a through-hole or surface-mount package, depending on the application requirements. Teccor Electronics provides detailed datasheets with specific electrical characteristics, including breakover voltage, holding current, and surge current ratings. These datasheets are essential for proper design and integration into overvoltage protection circuits. The SIDAC is designed to meet industry standards for environmental compliance, such as RoHS. Its robust design and reliable switching characteristics make it a valuable component for ensuring the protection and longevity of electronic systems.