K2500E70AP

Overview

The Littelfuse K2500E70AP is a standard bidirectional SIDAC from the Kxxxzy series, functioning as a silicon voltage-triggered switch. It features a breakover voltage (VBO) range of 240 V to 280 V and a repetitive peak off-state voltage (VDRM) of 200 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 on-state voltage (VTM) of 1.5 V, and a breakover current (IBO) of 10 μA. It operates within a junction temperature range of -40°C to 125°C and is housed in a TO-92 package.

Feature Summary

• Silicon bilateral voltage triggered switch utilizing negative resistance region for switching
• Glass-passivated junctions designed for ruggedness and harsh environment durability
• RoHS compliant construction with matte tin plated terminals

Applications

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

Procurement Notes

Verify the specific ordering suffix 'AP' corresponds to the Ammo Pack packaging configuration when sourcing components. Confirm that the manufacturer's datasheet specifications remain valid for the intended application parameters. Ensure compliance with RoHS directives and check for any recent product change notifications regarding material or process updates before finalizing procurement decisions.

Selection Notes

Select this component based on the required breakover voltage range of 240 V to 280 V for the specific circuit design. Ensure the application current does not exceed the 1 A RMS rating and that the operating junction temperature remains within the specified -40°C to 125°C limits. Consider the TO-92 through-hole package constraints for PCB layout and thermal management requirements relative to the 35 °C/W thermal resistance.

Part Context

This part belongs to the Littelfuse Kxxxzy series of standard bidirectional SIDACs. The series offers various breakover voltages ranging from 79 V to 330 V across different package options including DO-15, DO-214, and TO-92. The K2500 variant specifically targets applications requiring higher triggering voltages near the upper end of the standard range.

Replacement Considerations

Compatible substitutes within the same family include K2500G (DO-15), K2500S (DO-214), and K2500E70 (Bulk TO-92). Verify that alternative packages meet the mechanical and thermal requirements of the existing design.