LLDB4-TP

Overview

The LLDB4-TP is a Diac (Diode for Alternating Current) manufactured by Micro Commercial Components. This bidirectional trigger diode is designed to facilitate the triggering of thyristors and triacs in AC power control applications. It features a symmetrical breakdown voltage characteristic, allowing it to conduct current equally in both directions once the threshold voltage is exceeded. The component is typically supplied in surface-mount packages suitable for automated assembly processes.

Feature Summary

• Symmetrical bidirectional switching capability for AC circuits
• Designed for reliable gate triggering of SCRs and TRIACs
• Compact surface-mount package construction

Applications

• Lighting dimmer circuits
• Motor speed control systems
• Thermostat and temperature control units

Procurement Notes

Verify the specific suffix codes on the ordering information to ensure the correct packaging configuration matches your production requirements. Confirm RoHS compliance status through the official datasheet or manufacturer certification documents before finalizing procurement orders to meet regulatory standards.

Selection Notes

Select this component based on its symmetrical breakover voltage specifications required for the specific gate drive characteristics of the target thyristor or triac. Ensure the peak forward current rating aligns with the circuit's maximum surge conditions and that the surface-mount footprint matches the PCB design constraints.

Part Context

This device belongs to the family of discrete semiconductor trigger diodes produced by Micro Commercial Components. It serves as a critical interface component between low-power control logic and high-power AC loads, enabling precise phase-angle control in various consumer and industrial electronic devices requiring AC switching functionality.

Replacement Considerations

Consult official cross-reference lists from Micro Commercial Components or authorized distributors for verified substitute part numbers. Ensure any replacement maintains identical symmetrical breakover voltage and package dimensions to guarantee functional compatibility without redesigning the host circuit board.