LLDB3-TP

Overview

The LLDB3-TP is a bidirectional DIAC/SIDAC thyristor manufactured by Micro Commercial Components (MCC). It is housed in a Mini MELF package and rated for a peak current of 2A. The device features a breakover voltage range of 28V to 36V, with a typical value of 32V. It supports a maximum power dissipation of 150mW and operates within a temperature range of -40°C to +125°C. The component is currently classified as obsolete.

Feature Summary

• Bidirectional triggering capability for AC phase control applications
• Robust construction suitable for high-reliability environments
• Compact Mini MELF packaging for space-constrained designs

Applications

• Lighting dimmer circuits
• Motor speed control systems
• Triac gate triggering networks

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Procurement should focus on verifying the authenticity of remaining stock from authorized distributors or secondary market suppliers. Ensure that any available units match the original datasheet specifications and packaging standards before integration into new production lines.

Selection Notes

Engineers selecting this part must account for its obsolete status when designing long-term products. Verify that the Mini MELF footprint matches existing PCB layouts. Consider the 2A peak current limit and 150mW power rating during thermal analysis. Confirm that the 28V to 36V breakover voltage aligns with the specific triac gate requirements of the target application circuit.

Part Context

The LLDB3-TP belongs to the DIAC and SIDAC family of discrete semiconductor devices produced by MCC. These components are designed for triggering other thyristors in AC power control circuits. The Mini MELF form factor provides a compact solution compared to traditional axial leaded packages, facilitating surface-mount assembly in modern electronic devices requiring precise phase-angle control.

Replacement Considerations

As an obsolete component, direct substitutes may be limited. Review equivalent DIAC/SIDAC devices in the Mini MELF package with similar breakover voltage ranges (28V-36V) and current ratings (2A). Verify pin compatibility and thermal characteristics before substituting.