K0900E70

Overview

The Littelfuse K0900E70 is a standard bidirectional SIDAC from the Kxxxzy series, functioning as a silicon voltage-triggered switch. It features a breakover voltage (VBO) range of 79 V to 97 V and a repetitive peak off-state voltage (VDRM) of 70 V. The device supports an on-state RMS current (IT(RMS)) of 1 A at 50/60 Hz with a junction temperature below 125°C. Key electrical parameters include a maximum dynamic holding current (IH) of 150 mA, a peak non-repetitive surge current (ITSM) of 20 A for single cycles at 60 Hz, and a peak on-state voltage (VTM) of 1.5 V. It operates within a junction temperature range of -40°C to 125°C and utilizes a TO-92 package.

Feature Summary

• Bilateral switching capability utilizing negative resistance region for low on-state voltage conduction
• Glass-passivated junction construction ensuring ruggedness in harsh environments
• RoHS compliant manufacturing process

Applications

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

Procurement Notes

Verify component authenticity by checking the date code marking format against Littelfuse standards. Confirm the TO-92 lead form matches Type 70 specifications. Ensure storage conditions remain within the specified temperature range to maintain performance integrity prior to assembly.

Selection Notes

Select this component when a breakover voltage between 79 V and 97 V is required for AC circuit triggering. Ensure the application current does not exceed the 1 A RMS rating. Consider thermal resistance values for heat dissipation calculations in enclosed designs.

Part Context

This part belongs to the Kxxxzy Series of Standard Bidirectional SIDACs manufactured by Littelfuse. The series offers various breakover voltages ranging from 79 V to 330 V across different packages including DO-15, DO-214, and TO-92. The K0900E70 specifically denotes the 79-97 V variant in the TO-92 package.

Replacement Considerations

Compatible substitutes within the same family include K0900G (DO-15 package) and K0900S (DO-214 package). Verify that alternative packages meet the mechanical mounting requirements and thermal dissipation needs of the original design.