K1050E70RP2

Overview

The Littelfuse K1050E70RP2 is a standard bidirectional SIDAC from the Kxxxzy series, housed in a TO-92 package with an RP2 reel pack configuration. It functions as a silicon bilateral voltage-triggered switch featuring glass-passivated junctions for ruggedness. Key electrical parameters include a breakover voltage (VBO) range of 95V to 113V and a repetitive peak off-state voltage (VDRM) of 90V. The device supports an on-state RMS current of 1A at 50/60Hz, with a dynamic holding current maximum of 150mA. It operates within a junction temperature range of -40°C to 125°C and features a thermal resistance of 35°C/W from junction to case.

Feature Summary

• Silicon bilateral voltage-triggered switch utilizing negative resistance region for switching
• Glass-passivated junctions ensure reliability in harsh environments
• RoHS compliant construction with matte tin plated leads

Applications

• High voltage power supplies
• Natural gas igniters
• High-pressure Sodium lamps
• Xenon flash ignition

Procurement Notes

Verify the specific ordering suffix RP2 confirms the reel pack packaging format for the TO-92 lead form. Confirm that the base part number K1050E70 matches the required VBO and VDRM specifications for the target circuit design before finalizing procurement orders.

Selection Notes

Select this component when a trigger voltage between 95V and 113V is required for AC circuits. Ensure the application current does not exceed the 1A RMS rating and that the PCB layout accommodates the TO-92 package dimensions and thermal requirements for the specified junction temperature limits.

Part Context

This device belongs to the Kxxxzy Series of Standard Bidirectional SIDACs manufactured by Littelfuse. The series offers various breakover voltages ranging from 79V to 330V across different packages including DO-15, DO-214, and TO-92. The K1050 variant specifically targets applications requiring approximately 100V triggering thresholds.

Replacement Considerations

Compatible substitutes within the same family include K1050G, K1050S, and K1050E70. Verify that alternative packages maintain identical electrical characteristics and physical mounting constraints if replacing the TO-92 version with DO-15 or DO-214 variants.