Q8025P5

Triacs Overview

The Littelfuse Q8025P5 is a bidirectional triac belonging to the Qxx25xx series, designed for high-power switching applications. It features an RMS on-state current of 25 A and a rated repetitive off-state voltage (VDRM) of 800 V. The device operates within a junction temperature range of -25°C to +125°C and utilizes a Fastpak-3 through-hole package. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger voltage of 2.75 V, and a gate trigger current ranging from 50 mA to 120 mA. It exhibits an on-state voltage of 1.4 V and a non-repetitive peak on-state current of 250 A.

Triacs Feature Summary

• Snubberless alternistor design enabling direct control of inductive loads without external RC snubber circuits.
• High dv/dt capability providing robust immunity against false triggering during rapid voltage transients.
• Fastpak-3 packaging offering low thermal resistance and compact footprint for efficient heat dissipation.

Triacs Applications

• Industrial motor speed control systems
• Solid-state relays for AC load switching
• Lighting dimmers and phase control circuits

Triacs Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package integrity and terminal condition upon receipt. Note that this specific part number may be subject to end-of-life status or limited availability; consult authorized distributors for current supply chain information and alternative sourcing options.

Triacs Selection Notes

Select the Q8025P5 when an 800 V blocking voltage and 25 A continuous current capacity are required in a low-profile through-hole configuration. Ensure the application's gate drive circuit can supply at least 120 mA to guarantee reliable turn-on under worst-case conditions. Verify that the operating environment remains within the specified -25°C to +125°C junction temperature range for optimal performance.

Triacs Part Context

This component is part of Littelfuse's Qxx25xx family of high-current triacs. The series is characterized by its snubberless operation and robust construction for industrial power control. The Q8025P5 specifically utilizes the Fastpak-3 package, distinguishing it from other family members that may use TO-220 or SMTO-218 packages while maintaining similar electrical ratings.

Triacs Replacement Considerations

Direct replacements must match the 800 V rating, 25 A current capacity, and Fastpak-3 package. Verify pinout compatibility and thermal characteristics. Cross-reference with other Qxx25xx series variants if package differences are acceptable, ensuring gate trigger requirements align with existing drive circuitry.