K2400GH

Overview

The Littelfuse K2400GH is a high-voltage trigger diode (SIDAC) designed for overvoltage protection in through-hole applications. It operates within the Kxxxzy series and utilizes a DO-15 package. 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 voltage (VDRM) of 190 V and maintains a low leakage current of 5 uA at VDRM. The component handles an RMS on-state current (It RMS) of 1 A and non-repetitive peak currents of 16.7 A or 20 A. It exhibits an on-state voltage of 1.5 V, a maximum holding current (Ih) of 150 mA, and functions reliably between -40 C and +85 C.

Feature Summary

• Provides bidirectional high-energy surge protection via snap-action triggering mechanism
• Engineered for robust performance in harsh environments with wide thermal operating range
• Features low breakover current sensitivity for precise threshold activation

Applications

• Gas discharge tube triggering circuits
• Surge protective devices for telecommunications lines
• Overvoltage protection for sensitive electronic equipment

Procurement Notes

Verify the specific datasheet revision and RoHS/REACH compliance status directly with Littelfuse or authorized distributors before integration. Confirm that the DO-15 through-hole package aligns with your PCB footprint requirements. Ensure the 1 A RMS current rating meets the thermal dissipation needs of your final assembly under continuous operation conditions.

Selection Notes

Select this component when a bidirectional trigger device is required for gas tube ignition or general surge suppression. Compare the 220 V to 250 V breakover voltage range against your circuit's nominal operating voltage to ensure proper triggering timing. Consider the DO-15 package size constraints and the 150 mA holding current limit relative to your load characteristics during design validation.

Part Context

The K2400GH belongs to Littelfuse's K-series SIDAC family, which specializes in high-voltage trigger diodes. These components are distinct from standard TVS diodes by their ability to handle higher energy pulses and their latching behavior until current drops below the holding threshold. This series is widely used in industrial and communication infrastructure for reliable transient suppression.

Replacement Considerations

Check Littelfuse documentation for direct pin-compatible substitutes within the K-series. Verify that any alternative part matches the 220-250 V VBO range and DO-15 package dimensions. Ensure the replacement maintains equivalent non-repetitive peak current ratings for safety compliance.