Q4008NH4RP

Triacs Overview

The Littelfuse Q4008NH4RP is a bidirectional triac designed for AC switching and phase control applications. It operates with an RMS on-state current of 8 A and supports a rated repetitive off-state voltage (VDRM) of 400 V. The device features a sensitive gate requiring a maximum trigger current (Igt) of 35 mA, enabling reliable digital control in Quadrants I and IV. Key electrical parameters include a holding current (Ih) maximum of 35 mA, a gate trigger voltage (Vgt) of 1.3 V, and an on-state voltage of 1.6 V. It withstands non-repetitive peak currents of 83 A or 100 A depending on the pulse width. The component functions within a temperature range of -40°C to +125°C and is housed in an SMTO-263-2 surface-mount package.

Triacs Feature Summary

• Sensitive gate architecture ensures reliable triggering from digital logic circuits in Quadrants I and IV.
• High commutation capability suitable for demanding AC switching environments.
• Surface-mount construction facilitates automated assembly and compact PCB design.

Triacs Applications

• Motor speed modulation controls
• Temperature modulation systems
• Lighting controls
• Static switching relays

Triacs Procurement Notes

Verify the specific suffix 'H4RP' against the manufacturer's official datasheet to confirm pinout orientation and tape-and-reel specifications. Ensure the procurement channel provides valid RoHS compliance documentation. Cross-reference the Mouser part number 576-Q4008NH4RP with Littelfuse's official ordering information to validate availability and packaging details before finalizing orders.

Triacs Selection Notes

Select this component when a surface-mount solution is required for 8 A AC loads at 400 V ratings. The sensitive gate characteristic makes it appropriate for direct interface with microcontrollers or logic gates without additional drive circuitry. Compare leakage current specifications and thermal resistance requirements against alternative packages like TO-220 variants if higher power dissipation is needed.

Triacs Part Context

This triac belongs to the Qxx08xHx series from Littelfuse, which includes various voltage ratings and package options. It shares core electrical characteristics with other members of the 8 Amp bi-directional solid state switch family. The 'Q' designation typically indicates standard or high commutation performance within the Teccor brand portfolio.

Triacs Replacement Considerations

Direct replacements within the same series include Q4008LH4TP for through-hole applications. For identical surface-mount form factors but different voltage ratings, consider QK008NH4RP for 1000 V requirements. Verify that any substitute maintains compatible gate trigger sensitivities and package dimensions.