K1500SRP

Overview

The K1500SRP is a high-voltage lamp ignitor manufactured by Littelfuse. It functions as a silicon bilateral voltage-triggered switch, also known as a SIDAC. The device operates by switching on through a negative resistance region when the applied voltage exceeds its breakover voltage point, maintaining conduction until current drops below the holding threshold. Key electrical parameters include a triggering voltage range of 79V to 330V and a rated current of 1 A. The component utilizes glass-passivated junctions for ruggedness and is RoHS compliant.

Feature Summary

• Silicon bilateral voltage-triggered switch design
• Glass-passivated junctions for environmental ruggedness
• RoHS compliant construction

Applications

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

Procurement Notes

Verify the specific trigger voltage bin required for the application, as the K1500SRP covers a range from 79V to 330V. Confirm package type and lead configuration match the PCB layout. Ensure compliance with RoHS standards if required by the end product specifications. Cross-reference the datasheet for exact holding current and peak pulse ratings.

Selection Notes

Select this component for AC circuit applications requiring reliable high-voltage triggering. The bilateral nature makes it suitable for symmetric AC waveforms. Consider the wide triggering voltage range (79V-330V) when designing the driver circuit to ensure proper turn-on characteristics. Verify thermal management requirements for the intended operating environment.

Part Context

This part belongs to the SIDAC family of thyristors designed for overvoltage protection and triggering. It is distinct from unidirectional SIDACs like the K1500S1URP. The SRP suffix typically denotes a specific packaging or reel format compared to bulk variants. It serves as a robust alternative to traditional spark gaps in ignition circuits.

Replacement Considerations

Direct substitutes may include other bilateral SIDACs from Littelfuse such as the K1500S series. Verify that any replacement matches the specific trigger voltage bin and current rating. Check package compatibility for through-hole mounting. Consult manufacturer cross-reference guides for exact functional equivalents.