K1500G

Overview

The Littelfuse K1500G is a standard bidirectional SIDAC (Silicon Bidirectional Trigger Diode) from the Kxxxzy series. It functions as a voltage-triggered switch, conducting current once the applied voltage exceeds its breakover threshold. Key electrical specifications include a breakover voltage range of 140V to 170V and a repetitive peak off-state voltage of 90V. The device supports an on-state RMS current of 1A at 50/60Hz and features a dynamic holding current between 10mA and 150mA. It utilizes a DO-15 package with glass-passivated junctions for environmental ruggedness.

Feature Summary

• Bidirectional switching capability suitable for AC circuits
• Glass-passivated junction construction for harsh environments
• RoHS compliant manufacturing

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm the package type and packing mode. The 'G' suffix indicates a DO-15 through-hole package. Confirm whether the part is supplied in bulk or reel pack formats based on production requirements. Ensure the component meets RoHS compliance standards for the intended assembly process.

Selection Notes

Select this component when a bidirectional trigger voltage within the 140V to 170V range is required. Ensure the circuit design accommodates the 90V repetitive peak off-state voltage limit. Verify that the application current does not exceed the 1A RMS rating. Consider thermal resistance parameters if operating near maximum junction temperatures.

Part Context

This component belongs to the Kxxxzy Series of Standard Bidirectional SIDACs manufactured by Littelfuse. The series offers various breakover voltages ranging from 79V to 330V across different package options including DO-15, DO-214, and TO-92. These devices are designed for reliable overvoltage triggering in industrial and consumer electronics.

Replacement Considerations

Compatible substitutes include other standard bidirectional SIDACs with matching breakover voltage ranges and current ratings. Verify pinout compatibility and package dimensions before substitution. Ensure the replacement device meets the same thermal and surge current specifications.