K0900S1URP

Overview

The Littelfuse K0900S1URP is a high-voltage trigger diode (SIDAC) from the Kxxx0yU series, designed for overvoltage protection in surface-mount applications. It features a DO-214AC-2 package and operates within a temperature range of -40°C to +85°C. Key electrical parameters include a breakover voltage (VBO) ranging from 79 V to 97 V, with a rated repetitive off-state voltage (VDRM) of 70 V. The device supports an RMS current rating of 1 A and can withstand non-repetitive on-state currents of 16.7 A or 20 A. It exhibits a maximum holding current of 150 mA and a low leakage current of 5 uA at VDRM.

Feature Summary

• Provides bidirectional high-voltage triggering for circuit protection
• Utilizes compact SMD DO-214AC-2 package for automated assembly
• Features low breakover current for precise triggering sensitivity

Applications

• Surge protection in AC mains-powered equipment
• Triggering circuits for thyristors and triacs
• Overvoltage protection in industrial control systems

Procurement Notes

Verify the specific suffix 'S1URP' against official Littelfuse documentation to confirm packaging details such as reel size or tape-and-reel specifications. Ensure the component meets RoHS and REACH SVHC compliance requirements relevant to your target market regulations before finalizing procurement orders.

Selection Notes

Select this component when a breakover voltage between 79 V and 97 V is required for low-voltage surge protection. Compare the 150 mA holding current against other SIDACs if latch-up immunity is critical. Confirm that the DO-214AC-2 footprint aligns with the PCB design constraints and thermal management capabilities of the host system.

Part Context

This part belongs to the Teccor K-series of SIDACs manufactured by Littelfuse. These devices are silicon avalanche-triggered diodes designed specifically for protecting sensitive electronic circuits from transient overvoltages. The K0900 variant represents the lower end of the voltage range within this family, suitable for lower voltage AC lines or DC protection scenarios.

Replacement Considerations

Potential substitutes include the K0900E70 for through-hole applications or other SIDACs with similar VBO ranges. Verify pinout compatibility and thermal characteristics before substitution. Consult Littelfuse cross-reference guides for exact functional equivalents.