K2200EH70RP2

Overview

The Littelfuse K2200EH70RP2 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 an on-state RMS current (It RMS) of 1 A. The device supports non-repetitive on-state currents of 16.7 A or 20 A, with a maximum holding current (Ih) of 150 mA and an on-state voltage of 1.5 V.

Feature Summary

• Provides bidirectional high-energy surge protection for sensitive electronic circuits
• Utilizes solid-state technology for reliable triggering without mechanical wear
• Designed for through-hole mounting to facilitate integration into standard PCB layouts

Applications

• Protection of telecommunications equipment against line surges
• Overvoltage protection in AC power supply inputs
• Triggering circuits for thyristors and triacs in industrial controls

Procurement Notes

Verify the specific suffix EH70RP2 to confirm the TO-92 through-hole package and reel packaging configuration. Ensure compatibility with the required breakover voltage tolerance and thermal management capabilities for the intended operating environment. Confirm RoHS compliance status via the manufacturer's official documentation before finalizing procurement specifications.

Selection Notes

Select this component when a robust, high-energy trigger device is needed for through-hole designs requiring a 220V nominal breakover voltage. Compare the 1A RMS current rating against peak load requirements. Consider the TO-92 package constraints regarding board space and lead length compared to surface-mount alternatives like the K2200S1URP if space is limited.

Part Context

This part belongs to the Littelfuse K-series Sidac family, which offers various packages including DO-15 and SMD options. The K2200EH70RP2 specifically targets applications needing the compact form factor of the TO-92 case while maintaining high surge handling capabilities typical of the broader K2200 product line.

Replacement Considerations

Direct substitutes include other K2200 variants with identical electrical characteristics but different packages, such as K2200G (DO-15) or K2200S1URP (DO-214AC). Verify that the replacement part matches the required VBO range and current ratings for the specific circuit design.