K1100G

Overview

The Littelfuse K1100G is a silicon bilateral voltage-triggered switch (SIDAC) from the Kxxxzy series, housed in a DO-15 through-hole package. It features a breakover voltage range of 104 V to 118 V and a repetitive peak off-state voltage of 90 V. The device supports an on-state RMS current of 1 A at 50/60 Hz with a junction temperature limit of 125°C. Key electrical parameters include a maximum dynamic holding current of 150 mA, a peak non-repetitive surge current of 20 A for a single cycle at 60 Hz, and a breakover current of 10 μA. The component operates within a junction temperature range of -40°C to 125°C and utilizes glass-passivated junctions for environmental ruggedness.

Feature Summary

• Bilateral switching capability utilizing negative resistance region for low on-state voltage conduction
• Glass-passivated junction construction ensuring reliability in harsh environments
• RoHS compliant manufacturing process

Applications

• High voltage power supplies
• Natural gas igniters
• High-pressure Sodium lamps
• Xenon flash ignition systems

Procurement Notes

Verify the specific package type matches the design requirements, as the K1100G designation corresponds to the DO-15 leaded configuration. Confirm that the breakover voltage tolerance aligns with the circuit's triggering thresholds. Ensure thermal management strategies account for the specified junction temperature limits during operation. Check for any updated datasheet revisions that may affect mechanical dimensions or electrical tolerances before finalizing procurement.

Selection Notes

Select the K1100G when a trigger voltage between 104 V and 118 V is required for AC circuits. The DO-15 package is suitable for through-hole mounting where higher current handling compared to smaller packages is needed. Consider the 1 A RMS current rating and 20 A surge capability for applications involving inductive loads or transient events. Evaluate the 90 V blocking voltage to ensure it remains below the operating voltage to prevent unintended triggering.

Part Context

The K1100G belongs to the Kxxxzy series of standard bidirectional SIDACs manufactured by Littelfuse. This series provides various breakover voltage options ranging from 79 V to 330 V across different package styles including DO-15, DO-214, and TO-92. The 'G' suffix specifically denotes the DO-15 axial leaded package, distinguishing it from surface-mount or plastic encapsulated variants within the same electrical family.

Replacement Considerations

Direct replacements within the same series include K1100S (DO-214 package) and K1100E (TO-92 package), provided the PCB layout accommodates the different physical dimensions. Other Kxxxzy models with similar breakover voltages may be used if the voltage threshold and current ratings are compatible with the existing circuit design.