Q2008L4

Triacs Overview

The Littelfuse Q2008L4 is a bidirectional triac designed for AC power control applications. It features an RMS on-state current rating of 8 A and a rated repetitive peak off-state voltage (VDRM) of 400 V. The device operates within a junction temperature range of -40°C to +125°C and utilizes a TO-220AB package for through-hole mounting. Key electrical characteristics include a maximum holding current of 50 mA, a gate trigger voltage of 2.5 V, and a gate trigger current ranging from 25 mA to 50 mA. The on-state voltage is specified at 1.6 V, with non-repetitive peak currents of 83 A or 100 A depending on the specific variant configuration.

Triacs Feature Summary

• Bidirectional switching capability for alternating current circuits
• Robust thermal performance suitable for high-temperature environments up to 125°C
• High surge current handling capacity for transient protection
• Standardized TO-220AB packaging for reliable mechanical mounting

Triacs Applications

• Solid-state relays requiring low-voltage isolation
• AC motor speed control systems
• Lighting dimmer circuits for residential and commercial loads

Triacs Procurement Notes

Verify the exact suffix designation against the manufacturer's official datasheet to ensure correct electrical tolerances. Confirm RoHS compliance status and specific lot traceability requirements before finalizing orders. Cross-reference the part number with authorized distributor catalogs to validate authenticity and avoid counterfeit components.

Triacs Selection Notes

Select this component when a 400 V blocking voltage and 8 A continuous current are required in a standard through-hole package. Ensure the gate drive circuit can supply the necessary trigger current of up to 50 mA. Evaluate thermal management needs based on the expected load current and ambient operating conditions to maintain junction temperatures within safe limits.

Triacs Part Context

This triac belongs to the Qxx08xx series from Littelfuse, which focuses on general-purpose power control devices. The series offers standardized electrical parameters for common AC switching tasks. The Q2008L4 specifically targets applications needing moderate current handling with reliable latching characteristics in compact industrial enclosures.

Triacs Replacement Considerations

Direct replacements must match the 8 A current rating, 400 V voltage rating, and TO-220AB package. Verify that substitute parts meet the same gate trigger specifications and thermal resistance values to ensure circuit compatibility without redesign.