K2501GL

Overview

The Littelfuse K2501GL is a Multipulse SIDAC voltage switch designed for metal-halide and high-pressure sodium lamp ignition circuits. It operates in a DO-15 axial leaded package with glass passivated junctions. The device features a breakover voltage range of 240V to 265V and a repetitive peak off-state blocking voltage of 200V. Key electrical parameters include an on-state RMS current of 1A, a non-repetitive surge forward current of 50A, and a dynamic holding current of 30mA typical. It supports a maximum operating junction temperature of 125°C and offers a commutation time of 100µsec.

Feature Summary

• Designed for robust solid-state switching in outdoor street and area lighting applications
• Capable of producing multiple pulses per half-cycle of 50/60 Hz line voltage
• Ensures reliability through glass passivated junctions and compound encapsulation

Applications

• Metal-halide lamp ignition circuits
• High-pressure sodium lamp ignition circuits
• Outdoor street and area lighting systems

Procurement Notes

Verify the specific ordering suffix (e.g., RP for Reel Pack, AP for Ammo Pack) against the required packaging quantity. Confirm that the component meets RoHS compliance standards if required by the assembly process. Ensure the selected part number corresponds to the exact voltage rating needed for the circuit design.

Selection Notes

Select this component when a trigger voltage between 240V and 265V is required for lamp igniters. Consider the 1A RMS current rating and 50A surge capability for circuit protection needs. Verify that the ambient temperature conditions do not exceed the specified limits for reliable operation.

Part Context

The K2501GL belongs to the Kxxx1GL series of Multipulse SIDACs from Littelfuse. This family includes variants with different breakover voltages, such as the K2201GL, K2401GL, and K3601GL, all sharing the same DO-15 package and general functional characteristics for lamp ignition.

Replacement Considerations

Direct substitutes within the same series include the K2401GL and K2201GL, though their breakover voltages differ. Ensure any replacement matches the required triggering voltage range for the specific lamp application.