LSDB3-TP

Overview

The LSDB3-TP is a bidirectional DIAC manufactured by Micro Commercial Components, housed in the Quadro MELF package. It serves as a trigger device for thyristor and triac applications. The component features a breakover voltage range of 28V to 36V with a nominal value of 32V. It supports a peak output current of 2A and has a breakover current specification of 50 µA. The device operates within a junction temperature range of -40°C to 125°C. The 'P' suffix indicates RoHS compliance and lead-free finish.

Feature Summary

• Bidirectional triggering capability for phase control circuits
• Quadro MELF surface-mount packaging for automated assembly
• RoHS compliant construction with lead-free finish

Applications

• Triac gate triggering
• Thyristor firing circuits
• Light dimmer controls
• Motor speed controllers

Procurement Notes

Verify part status carefully as the LSDB3-TP is listed as obsolete in several distributor databases. Confirm availability through authorized channels or check for valid replacement alternatives from MCC. Ensure the ordering suffix matches the required RoHS compliance specifications. Request official datasheets to confirm electrical parameters before integration into production designs.

Selection Notes

Select this component when a surface-mount DIAC with a 28V to 36V breakover voltage is required for low-power triggering applications. The Quadro MELF package offers compact footprint advantages for space-constrained PCB layouts. Consider the 2A peak current rating to ensure adequate margin for the specific load being triggered. Verify thermal management requirements against the specified operating temperature range.

Part Context

This device belongs to the DIAC/SIDAC category from Micro Commercial Components. It is functionally similar to other DIACs but distinguished by its specific Quadro MELF form factor. The product line includes variants such as LLDB3-TP and LLDB4-TP, which share similar electrical characteristics but may differ in package or specific voltage tolerances.

Replacement Considerations

Consult manufacturer documentation for direct substitutes. Generic DIAC equivalents may match electrical specs but differ in package dimensions. Verify compatibility with existing PCB footprints if replacing with alternative surface-mount devices.