Q4008N4RP

Triacs Overview

The Littelfuse Q4008N4RP is a bidirectional triac from the Qxx08xHx series, designed for AC switching and phase 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 operates within a temperature range of -40°C to +125°C and utilizes an SMTO-263-2 surface-mount package. Key electrical parameters include a maximum holding current (Ih) of 35 mA, a gate trigger voltage (Vgt) of 1.3 V, and a gate trigger current (Igt) of 35 mA. The on-state voltage is specified at 1.6 V, with a non-repetitive peak on-state current capability of 83 A or 100 A depending on the specific variant configuration.

Triacs Feature Summary

• Sensitive gate design ensuring reliable triggering in Quadrants I & IV for digital control circuitry compatibility
• High commutation capability suitable for circuits requiring robust dv/dt performance
• Surface-mount construction optimized for automated assembly processes

Triacs Applications

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

Triacs Procurement Notes

Verify the exact suffix designation against the manufacturer's official datasheet to confirm specific electrical tolerances and packaging options. Ensure that the procurement channel provides authentic Littelfuse components with traceable documentation. Confirm compliance requirements such as RoHS and REACH status prior to integration into final assemblies.

Triacs Selection Notes

Select this component when a sensitive gate triac is required for digital interface applications operating at 400 V. The SMTO-263-2 package facilitates surface-mount technology integration. Verify that the gate trigger current of 35 mA aligns with the driving circuit's output capabilities to ensure reliable turn-on under all operating conditions.

Triacs Part Context

This part belongs to the Qxx08xHx series of 8 Amp Triacs manufactured by Littelfuse. The series includes variants with different voltage ratings and package types, such as through-hole TO-220 devices. The 'H' suffix typically denotes high commutation characteristics, distinguishing it from standard or sensitive-only variants within the broader Q4008 product family.

Triacs Replacement Considerations

Direct replacements may include other Littelfuse Q4008 variants with compatible pinouts and electrical ratings. Cross-manufacturer equivalents should match the 8 A RMS current, 400 V blocking voltage, and sensitive gate specifications. Verify package dimensions and thermal characteristics before substitution.