K0900S

Overview

The Littelfuse K0900S is a silicon bilateral voltage-triggered switch belonging to the Kxxxzy SIDAC series. It features glass-passivated junctions for ruggedness and operates within a breakover voltage range of 79 V to 97 V, with a repetitive peak off-state voltage of 70 V. The device supports an on-state RMS current of 1 A at 50/60 Hz and handles a peak non-repetitive surge current of 20 A (single cycle, 60 Hz). Packaged in the DO-214 surface-mount format, it maintains a junction temperature range from -40 °C to 125 °C and a storage temperature range from -40 °C to 150 °C.

Feature Summary

• Bidirectional voltage triggering via negative resistance region
• Glass-passivated junction technology for harsh environment reliability
• DO-214 surface-mount package configuration

Applications

• High-voltage power supplies
• Natural gas igniters
• High-pressure Sodium lamp firing circuits
• Xenon flash ignition systems

Procurement Notes

Verify the specific suffix 'S' corresponds to the DO-214 package variant when sourcing. Confirm RoHS compliance status through official Littelfuse documentation prior to integration. Ensure component handling procedures align with the specified soldering parameters to prevent thermal damage during assembly processes.

Selection Notes

Select this component for AC circuit applications requiring precise voltage triggering between 79 V and 97 V. Evaluate the 1 A RMS current rating against load requirements. Consider the DO-214 footprint for space-constrained PCB layouts. Verify that the 1500 V/μs dv/dt rating meets the transient voltage conditions of the target application.

Part Context

The K0900S is part of the standard Kxxxzy SIDAC family manufactured by Littelfuse. This series utilizes bidirectional thyristor technology designed for high-voltage switching. The '0' indicates standard circuit function, while 'S' designates the DO-214 surface-mount package type within the broader product lineup.

Replacement Considerations

Cross-reference with other K0900 variants such as K0900G (DO-15) or K0900E (TO-92) if package compatibility differs. Ensure trigger voltage ranges match exactly to maintain circuit timing integrity.