K2401GRP

Overview

The Littelfuse K2401GRP is a high-voltage trigger diode, classified as a SIDAC within the Multipulse series. It operates in the DO-15 axial through-hole package and is designed for robust lamp ignition applications. The device features a breakover voltage (VBO) range of 220 V to 250 V with a maximum breakover current (IBO) of 10 uA. It supports a rated repetitive off-state blocking voltage (VDRM) of 190 V and maintains a low leakage current of 5 uA under VDRM conditions. The component handles non-repetitive on-state currents of 16.7 A or 20 A and an RMS current rating of 1 A. It exhibits an on-state voltage of 1.5 V and a maximum holding current (Ih) of 150 mA. The unit functions reliably across a temperature range of -40 C to +85 C.

Feature Summary

• Multipulse capability for generating multiple pulses per half-cycle in 50/60 Hz line voltage circuits
• Robust solid-state switch design suitable for high ambient temperatures up to 90°C
• Excellent commutation time optimized for metal-halide and high-pressure sodium lamp igniters

Applications

• Metal-Halide lamp ignition circuits
• High Pressure Sodium lamp ignition circuits for outdoor street lighting
• Area lighting systems requiring robust voltage switching

Procurement Notes

Verify the specific datasheet revision and RoHS compliance status before integration, as manufacturing parameters may evolve. Confirm that the DO-15 axial leaded package aligns with your PCB footprint requirements. Ensure the 1 A RMS current rating meets the thermal dissipation needs of your circuit design. Cross-reference the 220 V to 250 V breakover voltage tolerance with your system's triggering thresholds to guarantee reliable operation under varying environmental conditions.

Selection Notes

Select this component when designing ignition circuits for metal-halide or high-pressure sodium lamps that require multipulse generation. The DO-15 package is appropriate for through-hole mounting where higher surge handling is needed compared to surface-mount alternatives. Consider the 190 V VDRM rating to ensure the device remains off during normal operating voltages while triggering reliably at the specified breakover point. Verify that the 150 mA holding current is sufficient to maintain conduction once triggered in your specific load configuration.

Part Context

The K2401GRP belongs to Littelfuse's Multipulse SIDAC family, specifically engineered for lamp ignition. This series distinguishes itself through enhanced commutation times and durability in harsh thermal environments. Unlike standard trigger diodes, these devices are optimized for repeated pulsing in AC line voltage applications, making them distinct from general-purpose thyristors or transient voltage suppressors used in other circuit protection roles.

Replacement Considerations

The K2401GLRP is a related variant within the same Kxxx1GL series, offering similar functionality but potentially different blocking voltage characteristics. Verify electrical compatibility, particularly the VDRM and VBO ranges, before substituting. Ensure the DO-15 package dimensions match exactly to avoid mechanical interference.