K2000EH70AP

Overview

The Littelfuse K2000EH70AP is a high-voltage trigger diode (Sidac) from the Kxxxzy series, designed for overvoltage protection in through-hole applications. It features a TO-92 package and operates within a temperature range of -40°C to +85°C. Key electrical parameters include a breakover voltage (VBO) of 205 V to 230 V, a rated repetitive off-state voltage (VDRM) of 180 V, and a maximum holding current (Ih) of 150 mA. The device supports an RMS on-state current (It RMS) of 1 A and can handle non-repetitive on-state currents of 16.7 A or 20 A depending on specific conditions. It exhibits a low on-state voltage of 1.5 V and a maximum breakover current (IBO) of 10 uA.

Feature Summary

• High-energy discharge capability for robust circuit protection
• Bidirectional switching behavior for AC line applications
• Low on-state voltage for efficient energy transfer during triggering

Applications

• Surge protection for telephone lines and data interfaces
• Overvoltage protection in AC power supply inputs
• Triggering devices for thyristor-based control circuits

Procurement Notes

Verify the exact datasheet revision and specific test conditions for non-repetitive current ratings, as values may vary between 16.7 A and 20 A. Confirm RoHS and REACH-SVHC compliance status directly with the manufacturer or authorized distributor documentation before integration. Ensure the TO-92 through-hole mounting style aligns with the target PCB design requirements.

Selection Notes

Select this component when a breakover voltage between 205 V and 230 V is required for bidirectional surge suppression. The 1 A RMS current rating suits moderate energy protection scenarios. Compare against the K1500E70AP if a lower breakover voltage around 150 V is sufficient for the application, noting that both share similar packaging and series characteristics.

Part Context

This part belongs to the Littelfuse K-series Sidacs, which are symmetric trigger diodes used primarily for transient voltage suppression. The K2000EH70AP specifically targets higher voltage thresholds compared to lower-voltage variants in the same family, offering a standardized TO-92 form factor for easy insertion into legacy and modern through-hole designs.

Replacement Considerations

The K1500E70AP is a related variant within the same Kxxxzy series but features a different breakover voltage profile. Direct substitution requires verifying that the system's operating voltage remains below the new component's VDRM and that the lower breakover threshold does not cause nuisance triggering.