Q4008DH3TP

Triacs Overview

The Littelfuse Q4008DH3TP is a bidirectional triac designed for AC power control applications. It features an RMS on-state current (It RMS) of 8 A and a rated repetitive off-state voltage (VDRM) of 400 V. The device exhibits a low on-state voltage of 1.5 V, with a maximum leakage current of 10 uA at VDRM. Gate triggering requirements are specified as 1.3 V (Vgt) and 10 mA (Igt). It operates within a temperature range of -40 C to +150 C and is housed in a surface-mount TO-252-3 package.

Triacs Feature Summary

• Bidirectional AC switching capability with integrated gate control
• High thermal stability supporting operation up to 150 C junction temperature
• Low on-state voltage drop for improved energy efficiency
• Glass-passivated junctions for long-term parameter stability

Triacs Applications

• AC phase control circuits
• Lighting dimmer applications
• Temperature modulation controls

Triacs Procurement Notes

Verify the specific suffix 'H3TP' against the manufacturer's official datasheet to confirm RoHS compliance and tape-and-reel packaging specifications. Ensure the ordering part number matches the exact electrical ratings required for the target circuit design before finalizing procurement.

Triacs Selection Notes

Select this component when a compact surface-mount solution is required for 400 V AC switching. The TO-252-3 package offers a balance between current handling capacity and board space constraints. Verify that the gate drive circuit can supply the specified 10 mA trigger current reliably across the full operating temperature range.

Triacs Part Context

This device belongs to the Littelfuse Teccor Q series of triacs. These components are engineered for general-purpose AC power control. The Q4008DH3TP variant specifically utilizes a surface-mount form factor, distinguishing it from through-hole equivalents like the Q4008L4TP while maintaining similar core electrical performance characteristics.

Triacs Replacement Considerations

Direct pin-compatible replacements include other 8 A, 400 V triacs in the TO-252 package. Verify gate sensitivity and holding current parameters match the original design requirements before substituting.