L4008D8RP

Triacs Overview

The Littelfuse L4008D8RP is a sensitive gate triac belonging to the Teccor Compak series, designed for surface-mount applications. It features an 8 A RMS on-state current and supports rated repetitive off-state voltages of 400 V, 600 V, and 800 V. The device guarantees four-quadrant gating control, enabling operation in Quadrants I, II, III, and IV. Key electrical parameters include a maximum non-repetitive surge current of 80 A, a holding current of 50 mA, and a gate trigger current of 10 mA. It operates within a junction temperature range of -40°C to +125°C and utilizes glass-passivated junctions for parameter stability.

Triacs Feature Summary

• Sensitive gate architecture ensuring reliable triggering across all four quadrants with digital circuitry
• Glass-passivated junctions providing long-term device reliability and parameter stability
• Electrically isolated surface mount package design suitable for automated assembly

Triacs Applications

• AC power switching circuits requiring compact form factors
• Solid-state relays and motor speed control systems
• Lighting dimmers and heating element controllers

Triacs Procurement Notes

Verify the specific voltage rating suffix (e.g., D8 for 800V) against the schematic requirements, as the base part number covers multiple voltage variants. Confirm RoHS compliance status via the manufacturer's latest documentation before integration. Ensure the TO-252 package footprint matches the PCB layout constraints. Check for any recent Product Change Notifications that may affect pinout or material composition.

Triacs Selection Notes

Select this component when high-density mounting is required alongside robust AC load handling capabilities. The sensitive gate characteristic simplifies drive circuit design by allowing control with low-power logic signals. Evaluate thermal management needs based on the 8 A RMS rating and the thermal resistance of the TO-252 package. Consider the 80 A surge capability for inductive load startup conditions.

Triacs Part Context

This device is part of the Littelfuse Teccor Compak line of sensitive gate triacs, which bridges the gap between through-hole components and smaller SOT-223 packages. The series offers current ratings from 0.8 A to 8 A and voltage ratings up to 600 V or higher depending on the suffix. It serves as a direct replacement for larger through-hole triacs in space-constrained consumer and industrial electronics.

Triacs Replacement Considerations

Direct replacements include other Littelfuse Triacs from the same Compak family with matching current and voltage ratings, such as the L4008D8TP. Cross-brand equivalents must be verified for identical four-quadrant sensitivity and TO-252 pinout compatibility.