ST32BRP

Overview

The Littelfuse ST32BRP is a bidirectional trigger diode (DIAC) designed for robust triggering applications in electronic circuits. It operates within a breakover voltage range of 30 to 34 volts and supports a peak current of 2 amperes. The component utilizes the DO-214 surface-mount package, facilitating automated assembly processes. It functions reliably across an extended temperature spectrum, ranging from -40°C to +125°C. This device is engineered for high-voltage switching tasks, ensuring stable performance in demanding environments while maintaining compliance with lead-free and RoHS standards.

Feature Summary

• Bidirectional trigger diode functionality for symmetrical AC circuit control
• High peak current capability of 2A for robust load handling
• Surface-mount DO-214 package design for compact integration
• Extended thermal stability operating between -40°C and +125°C

Applications

• Relay control circuits requiring precise voltage threshold triggering
• Triac gate drive circuits for AC power regulation
• Lighting dimmer switch implementations
• Motor speed control systems utilizing phase-angle firing

Procurement Notes

Verify that the ordered part number matches the specific Littelfuse ST32BRP designation to ensure correct voltage characteristics and package type. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Check datasheet specifications for breakover voltage tolerances to ensure compatibility with the target circuit design requirements before procurement.

Selection Notes

Select this component when a reliable bidirectional trigger is required for AC switching applications. The 30-34V breakover range suits standard triac gate driving needs. Ensure the DO-214 footprint aligns with the PCB layout constraints. Consider the 2A current rating against the expected load demands to guarantee safe operation within the specified thermal limits during continuous use.

Part Context

This DIAC belongs to the Littelfuse family of trigger devices, specifically optimized for controlling thyristors and triacs. It serves as a critical interface component in phase-control circuits, providing consistent turn-on signals. The ST32B series represents a standard solution for industrial and consumer electronics requiring dependable AC switching capabilities with minimal external components.

Replacement Considerations

The ST32B variant shares identical electrical characteristics and may serve as a functional substitute depending on packaging availability.