K2500EH70AP

Overview

The Littelfuse K2500EH70AP is a high-voltage trigger diode, classified as a SIDAC within the thyristor family. It operates in the TO-92 through-hole package and belongs to the Kxxxzy series. The device features a breakover voltage (VBO) range of 240 V to 280 V and a rated repetitive off-state voltage (VDRM) of 200 V. It supports an RMS on-state current (It RMS) of 1 A and a non-repetitive on-state current of up to 20 A. The component maintains a maximum holding current (Ih) of 150 mA and exhibits an on-state voltage of 1.5 V. It functions reliably across a temperature range from -40°C to +85°C.

Feature Summary

• Provides bidirectional high-voltage triggering for circuit protection applications
• Designed with robust energy handling capabilities for transient suppression
• Utilizes a standard through-hole TO-92 package for easy integration

Applications

• Gas discharge tube triggering circuits
• Overvoltage protection modules
• Lighting ballast ignition systems

Procurement Notes

Verify the specific suffix EH70 against official Littelfuse documentation to confirm packaging and compliance details. Ensure the procurement channel provides valid traceability for this semiconductor component. Cross-reference the manufacturer part number with authorized distributor listings to validate authenticity before purchase.

Selection Notes

Select this component when a breakover voltage between 240 V and 280 V is required for triggering protective devices. The 1 A RMS current rating suits moderate energy dissipation needs. Verify that the TO-92 package dimensions fit the target PCB layout and that the operating temperature range meets environmental specifications.

Part Context

This part belongs to the Littelfuse K-series SIDACs, which are specialized two-terminal thyristors designed for high-energy switching. These devices are commonly used to trigger gas discharge tubes or silicon controlled rectifiers in surge protection circuits. The K2500 variant specifically targets higher voltage thresholds compared to lower-rated siblings in the same family.

Replacement Considerations

Direct substitutes include other SIDACs with matching 240-280 V breakover voltages and TO-92 packages. Verify equivalent current ratings and thermal characteristics before substitution.