K2400EH70AP

Overview

The Littelfuse K2400EH70AP 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 leakage current of 5 uA at VDRM. The holding current (Ih) maximum is 150 mA, and the on-state voltage is 1.5 V. Operating temperatures range from -40 C to +85 C.

Feature Summary

• High-energy silicon unilateral voltage-triggered switch designed for rectified AC/DC circuits
• Provides robust overvoltage protection in high-exposure environments
• Through-hole mounting capability in standard TO-92 package

Applications

• Overvoltage protection for electronic circuits
• Triggering devices for thyristors and triacs
• Surge protection in industrial control systems

Procurement Notes

Verify the specific suffix EH70 against official Littelfuse documentation to confirm packaging type, as bulk and ammo pack variants exist within the same electrical family. Ensure the ordering part number matches the required RoHS compliance status and REACH-SVHC declarations found in the manufacturer's datasheet. Cross-reference the Mouser part number 576-K2400EH70AP with Littelfuse's official catalog to validate availability and production cycle times before finalizing procurement plans.

Selection Notes

Select this component when a bidirectional trigger device with a 220 V to 250 V breakover threshold is required. The 1 A RMS current rating suits moderate power applications. Verify that the TO-92 package fits the PCB layout constraints. Compare the 190 V VDRM against the circuit's maximum continuous operating voltage to ensure adequate safety margins. Confirm thermal requirements align with the -40 C to +85 C operating range.

Part Context

The K2400EH70AP is part of Littelfuse's K-series Sidacs, which are silicon unilateral voltage-triggered switches oriented for rectified AC/DC circuits. These devices offer high energy handling capabilities compared to standard diodes. The K-series provides reliable triggering for SCRs and triacs in motor controls, lighting dimmers, and appliance protection circuits, distinguishing itself through robust surge tolerance and precise breakover voltage characteristics.

Replacement Considerations

Publicly confirmed substitute part numbers for K2400EH70AP were not identified in the provided source material. Designers should consult Littelfuse's official cross-reference tools or contact manufacturer support directly to identify equivalent components with matching VBO, IBO, and package specifications.