K2401F1

Overview

The Littelfuse K2401F1 is a silicon bilateral voltage-triggered switch designed for high-voltage applications. It features a breakover voltage (VBO) range of 220 V to 250 V and a repetitive peak off-state voltage (VDRM) of ±190 V. The device supports an on-state RMS current (IT(RMS)) of 1 A and a non-repetitive peak surge current (ITSM) of 20 A. It operates within a junction temperature range of -40 °C to +125 °C and utilizes a DO-15X package.

Feature Summary

• Glass-passivated junctions ensure rugged performance in harsh environments
• Optimized for high switching frequencies required in HID lighting ignitor circuits
• Bidirectional AC circuit operation with low on-state voltage

Applications

• High intensity discharge (HID) lamp ignitors
• Metal halide lamp ignition circuits
• Natural gas, oil, and high-voltage lamp ignitors
• Overvoltage protection devices
• Pulse generators

Procurement Notes

Verify the specific package configuration and lead form requirements against the datasheet dimensional outlines before ordering. Confirm that the application load impedance aligns with the device's switching resistance characteristics to ensure reliable commutation. Ensure thermal management strategies account for the specified junction temperature limits during continuous operation.

Selection Notes

Select this component when designing circuits requiring precise triggering at higher frequencies, such as metal halide lamp ignitors. The F1 suffix indicates a variant optimized for these specific high-frequency commutation needs compared to standard E or G packages. Ensure the supply voltage does not exceed the maximum repetitive peak off-state voltage rating under normal operating conditions.

Part Context

This part belongs to the Sidac family of silicon bilateral voltage-triggered switches manufactured by Littelfuse. These devices offer greater power-handling capabilities than standard diacs and are characterized by their negative resistance region upon triggering. The K2401F1 is specifically engineered for robust performance in industrial and lighting control systems.

Replacement Considerations

Standard equivalents include K2400E70, K2400G, and K2400S. Note that the K2401F1 is distinct due to its optimization for higher switching frequencies in HID ignitor circuits; substitute parts may require circuit adjustments to maintain proper pulse generation rates.