K2400EH70

Overview

The Littelfuse K2400EH70 is a high-voltage trigger diode, classified as a Sidac within the thyristor subcategory. It operates in through-hole TO-92 packaging and belongs to the Kxxxzy series. The device features a breakover voltage (VBO) ranging from 220 V to 250 V, with a maximum breakover current (IBO) of 10 uA. It supports an RMS on-state current (It RMS) of 1 A and a non-repetitive on-state current of 16.7 A or 20 A. The rated repetitive off-state voltage (VDRM) is 190 V, with a maximum holding current (Ih) of 150 mA. Operating temperatures range from -40 C to +85 C.

Feature Summary

• High-energy discharge capability for robust circuit protection
• Uni-directional switching behavior for overvoltage suppression
• Through-hole mounting for standard PCB integration

Applications

• Overvoltage protection in industrial control circuits
• Triggering elements for silicon-controlled rectifiers (SCRs)
• Surge protection in AC power line interfaces

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number K2400EH70 with official Littelfuse documentation. Confirm RoHS compliance status via the provided datasheet details. Ensure the TO-92 package and through-hole installation style match the target design requirements before finalizing acquisition.

Selection Notes

Select this component when a uni-directional trigger device with a 220 V to 250 V breakover threshold is required. The 1 A RMS current rating suits moderate energy applications. Consider the TO-92 through-hole package for manual assembly or specific mechanical constraints. Verify that the 150 mA holding current aligns with the latch-up characteristics of the protected circuit.

Part Context

This part belongs to the Littelfuse K-series Sidacs, designed for high-voltage triggering applications. It complements other thyristors in the family by offering specific breakover voltages and current ratings. The K2400EH70 variant specifically targets applications requiring reliable turn-on characteristics at approximately 240 V levels.

Replacement Considerations

Check for direct substitutes within the K2400 series or equivalent Sidac devices from other manufacturers. Ensure replacement parts match the 220 V to 250 V VBO range and TO-92 package dimensions. Verify identical electrical parameters for IBO, Ih, and It RMS to maintain circuit performance.