FKPF5N80TU

Triacs Overview

The FKPF5N80 is a Bi-Directional Triode Thyristor manufactured by onsemi, formerly Fairchild Semiconductor. It features an 800 V repetitive peak off-state voltage and supports a 5 A RMS on-state current at a case temperature of 104°C. The device utilizes a TO-220F package with a thermal resistance from junction to case of 3.9 °C/W. Key electrical characteristics include a maximum gate trigger voltage of 1.5 V across all quadrants and a holding current limit of 30 mA. Surge capabilities reach 50 A at 50 Hz and 55 A at 60 Hz for one full cycle.

Triacs Feature Summary

• Bi-directional triode thyristor structure designed for AC switching applications
• High isolation voltage capability of 1500 V between terminals and case
• Robust surge on-state current handling for resistive and inductive loads
• Defined critical rate of rise of off-state commutating voltage for reliable operation

Triacs Applications

• Switching mode power supplies
• Light dimmers and electric flasher units
• Small motor control circuits
• Solenoid drivers

Triacs Procurement Notes

Verify the component status as obsolete within the manufacturer's portfolio before procurement planning. Confirm that the TO-220F package dimensions match the target PCB footprint requirements. Ensure thermal management designs account for the specified junction-to-case thermal resistance values under expected operating conditions.

Triacs Selection Notes

Select this component for applications requiring bidirectional AC control with high voltage blocking capabilities. Evaluate the thermal constraints based on the RMS on-state current ratings and the specific heat sink configuration intended for use. Verify that the gate trigger characteristics align with the driving circuit specifications for reliable turn-on across all quadrants.

Triacs Part Context

This part belongs to the legacy Fairchild Semiconductor product line acquired by onsemi. It represents a planar silicon thyristor technology designed for general-purpose AC switching. The datasheet revision indicates final production specifications prior to discontinuation.

Triacs Replacement Considerations

FKPF5N80TU

Triacs FAQ

What is the maximum isolation voltage rating?

The isolation voltage is rated at 1500 V AC for one minute between the T1, T2, and Gate terminals to the case at 25°C.

How does the surge on-state current vary with frequency?

The peak surge on-state current is 50 A at 50 Hz and 55 A at 60 Hz for a single non-repetitive half-cycle.

What is the critical rate of rise of off-state commutating voltage?

The critical rate of rise of off-state commutating voltage is specified as 10 V/µs under inductive load conditions at a junction temperature of 125°C.