K2000EH70RP2

Overview

The K2000EH70RP2 is a high-voltage trigger diode (Sidac) manufactured by Littelfuse, designed for robust circuit protection in through-hole applications. Housed in a TO-92 package, this bidirectional device operates within a temperature range of -40°C to +85°C. Key electrical parameters include a breakover voltage (VBO) ranging from 205 V to 230 V and a rated repetitive off-state voltage (VDRM) of 180 V. The component 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 features a maximum holding current (Ih) of 150 mA and a low on-state voltage of 1.5 V, ensuring efficient triggering and conduction characteristics for surge suppression tasks.

Feature Summary

• Bidirectional high-energy switching capability for symmetrical surge protection
• Integrated trigger mechanism eliminating the need for external discrete components
• Robust construction suitable for harsh industrial environments

Applications

• Protection of telephone lines and telecommunications equipment against voltage transients
• Triggering circuits for thyristors and triacs in AC power control systems
• Surge suppression in lighting control and motor speed regulation applications

Procurement Notes

Verify the exact part number suffix to ensure correct packaging and voltage tolerance specifications. Confirm RoHS compliance status with the manufacturer prior to ordering. Check for any recent product change notifications that may affect pinout or electrical ratings. Ensure supply chain stability as lead times may vary based on production schedules.

Selection Notes

Select this component when a bidirectional trigger device with high energy handling is required. Ensure the system's peak transient voltage exceeds the minimum breakover voltage of 205 V but remains below the maximum rating. Verify that the load current does not exceed the 1 A RMS limit. Consider the TO-92 package constraints for PCB layout and thermal management requirements.

Part Context

This device belongs to the Kxxxzy series of Sidac devices from Littelfuse. These components are specifically engineered to provide reliable overvoltage protection without the complexity of multi-component solutions. The series is widely used in industries requiring compliant protection for sensitive electronic interfaces against lightning-induced surges and switching transients.

Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic replacements may differ in energy handling capacity or breakover voltage tolerances. Ensure any substitute maintains the same TO-92 package and bidirectional functionality to preserve circuit integrity.