K2501G

Overview

The Littelfuse K2501G is a Multipulse SIDAC, a bidirectional voltage-triggered switch belonging to the Teccor brand thyristor family. Designed for robust solid-state switching, it operates with a breakdown voltage typically ranging from 30V to 36V. The device is engineered to handle lamp igniter applications where ambient temperatures reach up to 90°C, allowing junction temperatures to rise to 125°C during fault conditions such as ruptured lamp elements. It features a DO-35 glass passivated package and provides reliable overvoltage protection in high-voltage ignition circuits.

Feature Summary

• Bidirectional voltage switching capability for AC and DC ignition circuits
• Robust thermal design supporting junction temperatures up to 125°C
• Glass-passivated junctions ensuring long-term parameter stability
• Compact DO-35 axial leaded form factor

Applications

• Metal Halide lamp ignition circuits
• High Pressure Sodium lamp ignition circuits for outdoor street lighting
• Area lighting systems requiring reliable trigger switches

Procurement Notes

Verify the specific datasheet revision when sourcing, as Littelfuse product lines may undergo updates. Confirm that the DO-35 package matches your PCB footprint requirements. Ensure the supplier provides original manufacturer documentation to validate the Teccor brand authenticity and technical specifications against official Littelfuse records.

Selection Notes

Select the K2501G when designing metal halide or high-pressure sodium lamp ballasts requiring a bidirectional trigger switch. This component is suitable for environments where circuit components may elevate junction temperatures significantly. Compare its breakdown voltage characteristics against other SIDACs if precise triggering thresholds are critical for your specific lamp type.

Part Context

The K2501G is part of the Littelfuse Multipulse SIDAC series within the broader Teccor thyristor portfolio. It serves as a specialized voltage switch distinct from standard diacs or triacs, offering higher energy handling capabilities for industrial lighting applications. Related parts in this family include variants like the K2501GL for standard bidirectional switching needs.

FAQ

What is the maximum junction temperature the K2501G can withstand?

The K2501G is designed to operate reliably with junction temperatures reaching up to 125°C, particularly in scenarios where ambient temperatures are high or lamp faults occur.

Is the K2501G suitable for both AC and DC applications?

Yes, as a bidirectional SIDAC, the K2501G functions as a voltage switch for both AC and DC ignition circuits used in various lamp types.

What packaging does the K2501G use?

The K2501G utilizes a DO-35 glass passivated axial leaded package, which provides electrical isolation and mechanical durability for through-hole mounting.