Q4010F51

Triacs Overview

The Littelfuse Q4010F51 is a silicon-controlled rectifier (SCR) designed for high-power AC switching applications. It features a standard TO-220AB insulated package, providing electrical isolation from the heatsink. The device is rated for a repetitive peak off-state voltage of 400V and a continuous on-state current of 10A. It supports a non-repetitive surge current of 100A at 8.3ms. The component operates within a junction temperature range of -40°C to 125°C and utilizes a gate trigger voltage of 1.3V with a maximum gate trigger current of 50mA.

Triacs Feature Summary

• Provides electrical isolation between the terminal and mounting surface via an integrated insulating washer.
• Engineered for robust performance in high-current AC power control circuits.
• Features a standardized TO-220AB insulated package for efficient thermal management.

Triacs Applications

• Industrial motor speed control systems
• Solid-state relays and contactors
• High-power lighting dimmers

Triacs Procurement Notes

Verify the specific suffix 'F51' against official Littelfuse documentation to confirm lead time and packaging configuration. Ensure the procurement channel provides traceability certificates. Confirm that the TO-220AB insulated variant matches the design requirement for board isolation. Cross-reference the datasheet revision date to ensure compliance with current manufacturing standards.

Triacs Selection Notes

Select this component when a 400V blocking capability and 10A continuous load are required in an isolated package. Compare the 100A surge rating against expected inrush currents in the target circuit. Evaluate the thermal resistance characteristics of the TO-220AB insulated housing against the available heatsinking solution. Verify gate drive requirements align with the specified trigger parameters.

Triacs Part Context

This SCR belongs to the general-purpose thyristor family utilized in industrial power electronics. It complements other Littelfuse discrete semiconductors by offering a balance of voltage rating and current handling in a widely adopted mechanical footprint. The insulated variant specifically addresses safety requirements in applications where the device case must remain electrically floating relative to ground.

Triacs Replacement Considerations

Direct replacements include equivalent 400V/10A SCRs in TO-220AB insulated packages from other manufacturers. Verify pinout compatibility and thermal interface specifications before substitution. Ensure the alternative device meets or exceeds the original surge current and gate trigger specifications.