K2400S

Overview

The Littelfuse K2400S is a standard bidirectional SIDAC (Silicon Bidirectional Trigger Diode) from the Kxxxzy series, designed as a silicon voltage-triggered switch. It features glass-passivated junctions for ruggedness and operates in AC circuits with a breakover voltage range of 220V to 250V. The device has a repetitive peak off-state voltage (VDRM) of 190V and supports an on-state RMS current of 1A at 50/60Hz. Key electrical parameters include a dynamic holding current maximum of 150mA, a peak non-repetitive surge current (ITSM) of 20A at 60Hz, and a peak repetitive pulse current (ITRM) of 80A at 60Hz. It is housed in a DO-214 surface-mount package.

Feature Summary

• Bidirectional switching capability utilizing negative resistance region for low on-state voltage conduction.
• Glass-passivated junction construction ensures reliability in harsh environments.
• RoHS compliant manufacturing process.

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 datasheet to confirm the exact package type and packaging option. The 'S' suffix indicates the DO-214 package. Confirm RoHS compliance status and lead finish specifications directly with the supplier or official documentation prior to procurement to ensure alignment with assembly requirements.

Selection Notes

Select the K2400S when a breakover voltage between 220V and 250V is required for AC circuit triggering. Ensure the application current does not exceed the 1A RMS rating and that the peak surge currents remain within the specified limits for the operating frequency. Consider thermal resistance values for proper heat dissipation design in the target environment.

Part Context

The K2400S belongs to the Kxxxzy Series of Standard Bidirectional SIDACs manufactured by Littelfuse. This series includes various voltage ratings and package options such as DO-15, DO-214, and TO-92. The component functions as a voltage-triggered switch suitable for protecting and triggering high-voltage loads in industrial and consumer applications.

Replacement Considerations

Direct substitutes within the same series include K2300S (220-240V VBO) and K2500S (240-280V VBO), provided the breakover voltage tolerance aligns with the circuit design. Other manufacturers producing equivalent SIDACs with matching VBO ranges and DO-214 packages may be considered after verifying all electrical and mechanical parameters.