K2401G

Overview

The Littelfuse K2401G is a high-voltage trigger diode, classified as an MP SIDAC within the Kxxxzy series. It operates in the DO-15 axial leaded package and is designed for through-hole mounting. The device features a breakover voltage (VBO) ranging from 220 V to 250 V with a maximum triggering current of 10 uA. It supports a repetitive off-state blocking voltage (VDRM) of 190 V and maintains a low leakage current of 5 uA under rated conditions. The component handles non-repetitive on-state currents of 16.7 A or 20 A and sustains an RMS current of 1 A. It exhibits an on-state voltage of 1.5 V and a maximum holding current of 150 mA. The operational temperature range spans from -40 C to +85 C.

Feature Summary

• Voltage switch functionality optimized for metal-halide and high-pressure sodium lamp ignition circuits.
• Robust solid-state design capable of handling ambient temperatures up to 90°C and junction temperatures up to 125°C.
• Excellent commutation time suitable for generating multiple pulses per half-cycle of 50/60 Hz line voltage.

Applications

• Metal-Halide lamp ignition circuits
• High Pressure Sodium lamp ignition circuits for outdoor street lighting
• Area lighting systems requiring robust igniter circuit components

Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm exact electrical tolerances and packaging configurations. Ensure the DO-15 through-hole package aligns with the target PCB layout requirements. Confirm RoHS compliance status for the specific manufacturing batch prior to integration into final assemblies.

Selection Notes

Select this component when designing igniter circuits for high-pressure discharge lamps that require reliable multiple-pulse generation. The DO-15 package provides sufficient thermal mass for junction temperatures reaching 125°C during lamp element failure scenarios. Ensure the circuit can handle the specified non-repetitive surge currents without damaging the switch.

Part Context

The K2401G belongs to the Multipulse SIDAC family manufactured by Littelfuse under the Teccor brand. These devices are silicon unilateral voltage-triggered switches specifically engineered for AC/DC circuit protection and lamp ignition. The K-series represents a standard lineup of high-voltage trigger diodes widely used in industrial lighting applications.

Replacement Considerations

The K2401GLRP is a documented variant within the same manufacturer's portfolio offering similar 240V specifications in the DO-15 package. Verify if the GLRP suffix indicates specific regulatory or packaging differences before substitution.