K1800SRP

Overview

The Littelfuse K1800SRP is a high-voltage trigger diode, specifically a SIDAC device, housed in the DO-214AA (SMB) surface-mount package. It features a breakover voltage of 183 V and a maximum holding current of 80 mA. The component supports a non-repetitive peak on-state current of 20 A and an RMS on-state current of 1 A. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• High-voltage triggering capability for circuit protection
• Bidirectional switching functionality
• Compact surface-mount construction

Applications

• Gas discharge tube triggering circuits
• Overvoltage protection modules
• Lightning surge arresters

Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with standard SMB footprint dimensions during PCB layout. Confirm RoHS compliance status through the manufacturer's latest release notes before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring reliable triggering for gas discharge tubes at approximately 180 volts. Verify that the 20 A peak current rating meets the expected surge requirements of the protected load. Ensure the operating environment remains within the specified -40°C to +125°C thermal limits for long-term reliability.

Part Context

This part belongs to the Littelfuse SIDAC family of high-voltage trigger devices. These components are distinct from standard thyristors by their bidirectional nature and specific breakover characteristics. They are primarily utilized as gate triggers for larger protective elements rather than as primary power switching devices in low-voltage applications.

Replacement Considerations

Consult Littelfuse official substitution guides for verified equivalents. Generic replacements may differ in breakover voltage tolerance or peak current handling capabilities.