K2000S

Overview

The Littelfuse K2000S is a standard bidirectional SIDAC silicon voltage-triggered switch designed for AC circuit applications. It features glass-passivated junctions for ruggedness in harsh environments. The device switches on when the applied voltage exceeds its breakover point, conducting through a negative resistance region until current drops below the holding threshold. Key electrical parameters include a breakover voltage range of 190V to 215V and a repetitive peak off-state voltage of 180V. It supports an on-state RMS current of 1A at 50/60Hz and can withstand a single-cycle peak non-repetitive surge current of 20A at 60Hz. The component operates within a junction temperature range of -40°C to 125°C and is housed in a DO-214 surface-mount package.

Feature Summary

• Bidirectional voltage triggering capability for AC circuits
• Glass-passivated junction construction for environmental reliability
• Low on-state voltage during conduction phase

Applications

• High-voltage power supplies
• Natural gas igniters
• High-pressure sodium lamp ignition
• Xenon flash ignition systems

Procurement Notes

Verify the specific suffix 'S' corresponds to the DO-214 surface-mount package configuration required for your PCB layout. Confirm that the 190V to 215V breakover voltage range aligns with your circuit's trigger requirements. Ensure thermal management strategies account for the specified junction temperature limits during operation.

Selection Notes

Select this component when a reliable, bidirectional trigger switch is needed for high-voltage pulse generation or ignition circuits. The DO-214 package suits space-constrained surface-mount designs. Consider the 1A RMS current rating and surge capabilities to ensure the device can handle the load currents without exceeding thermal or electrical limits.

Part Context

The K2000S belongs to the Kxxxzy series of standard bidirectional SIDACs from Littelfuse. This series offers various breakover voltages ranging from 79V to 330V across different packages including DO-15, DO-214, and TO-92. The K2000 variant specifically targets applications requiring a breakover voltage around 200V.

Replacement Considerations

Compatible substitutes within the same family include K2000G (DO-15) and K2000E (TO-92), provided the package form factor is adaptable. Other K-series SIDACs with similar breakover voltages may be used if mechanical mounting constraints are addressed.