K1400E70

Overview

The Littelfuse K1400E70 is a silicon bilateral voltage-triggered switch belonging to the Kxxxzy SIDAC series. It features a breakover voltage (VBO) range of 130 V to 146 V and a repetitive peak off-state voltage (VDRM) of 90 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 peak on-state voltage of 1.5 V, a dynamic holding current maximum of 150 mA, and a breakover current of 10 μA. 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 junctions designed for ruggedness and dependable performance in harsh environments

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and lead form configuration. Ensure that the selected variant matches the required circuit function and packaging mode for the intended assembly process. Cross-reference the part number with the latest datasheet revisions to confirm parameter stability and compliance status before finalizing procurement orders.

Selection Notes

Select this component based on the required breakover voltage range of 130 V to 146 V for the specific application circuit. Confirm that the 1 A RMS current rating and 90 V blocking voltage are sufficient for the load conditions. Consider the thermal resistance characteristics of the TO-92 package when designing heat dissipation strategies for continuous operation within the specified temperature limits.

Part Context

This component is part of the Littelfuse Kxxxzy Standard Bidirectional SIDAC family. It serves as a silicon bilateral voltage triggered switch designed for AC circuit applications. The series offers various voltage ratings and package options, including DO-15, DO-214, and TO-92, to accommodate different mounting and environmental requirements.

Replacement Considerations

Compatible substitutes within the same series include K1400G (DO-15 package) and K1400S (DO-214 package). Verify pinout compatibility and thermal resistance differences when substituting between package types.