K1400SRP

Overview

The Littelfuse K1400SRP is a high-voltage silicon unilateral voltage-triggered switch (SIDACtor) designed for overvoltage protection in AC and DC circuits. It features a breakover voltage of 140V, enabling reliable triggering during transient events. The component utilizes a robust silicon structure to handle high surge currents while maintaining low leakage in the off-state. Packaged in an axial leaded configuration suitable for through-hole mounting, it provides effective clamping to protect sensitive downstream electronics from voltage spikes exceeding its rated threshold.

Feature Summary

• Unilateral voltage-triggered switching action for precise overvoltage detection
• High surge current capability for robust transient energy dissipation
• Low leakage current in non-conducting state to minimize power loss
• Axial leaded package design for secure PCB integration

Applications

• Protection of AC/DC rectified circuits against voltage transients
• Triggering mechanisms for thyristors and triacs in power control systems
• Overvoltage protection in industrial equipment and power supplies
• Surge suppression in consumer electronics and home appliances

Procurement Notes

Verify the exact part number suffix to confirm packaging format, as standard and reel variants may differ. Confirm compliance with relevant safety standards required for your specific end-product application. Ensure the operating temperature range aligns with your system's environmental conditions before finalizing procurement.

Selection Notes

Select this component when a unilateral trigger device is required for voltages around 140V. Compare breakover voltage tolerance and peak pulse current ratings against expected transient levels in the target circuit. Ensure the axial leaded form factor fits the available board space and mounting constraints compared to surface-mount alternatives.

Part Context

This component belongs to the SIDACtor family of silicon unilateral voltage-triggered switches manufactured by Littelfuse. These devices are engineered specifically for overvoltage protection applications where precise triggering thresholds are necessary. The K-series typically denotes specific voltage ratings within this broader product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs if considering alternative manufacturers or different voltage ratings within the same functional category.