K1050S1URP

Overview

The Littelfuse K1050S1URP is a high-voltage trigger diode, classified as a SIDAC within the Teccor family. It operates in the DO-214AC (SMB) surface-mount package with two leads. Key electrical parameters include a breakover voltage (VBO) of 110 V and a maximum breakover current (IBO) of 10 uA. The device supports an RMS on-state current (It RMS) of 1 A and a non-repetitive peak on-state current of 1 A. The rated repetitive off-state voltage (VDRM) is 90 V, with a corresponding leakage current of 5 uA. It features a holding current (Ih) maximum of 80 mA and an on-state voltage of 1.5 V. The component functions reliably across a temperature range from -40 C to +125 C.

Feature Summary

• Bidirectional switching capability for AC circuit protection applications
• Surface-mount construction utilizing the DO-214AC package for automated assembly
• High thermal stability supporting operation up to 125 C junction temperature

Applications

• Overvoltage protection in residential and commercial lighting systems
• Triggering elements for silicon-controlled rectifiers (SCRs) in motor control circuits
• Surge suppression in appliance power supplies

Procurement Notes

Verify the specific ordering suffix 'URP' against the manufacturer's latest documentation to confirm reel packaging quantities and tape specifications. Ensure compliance with RoHS directives and REACH regulations by checking the official datasheet for substance declarations. Confirm that the DO-214AC footprint matches the target PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when a precise 110 V breakover threshold is required for bidirectional triggering. Compare the 1 A RMS current rating against load requirements to ensure adequate margin. Consider the DO-214AC package dimensions if space constraints exist. Evaluate the 125 C operating temperature limit against ambient conditions to determine if additional thermal management is necessary for the specific application environment.

Part Context

This part belongs to the Littelfuse Teccor K-series SIDAC family, designed for high-voltage triggering. It shares functional similarities with other Kxxx0yU series devices but differs in specific voltage ratings and package types. The S1 designation typically indicates specific voltage tolerances within the series. It serves as a solid-state alternative to gas discharge tubes in compact electronic designs requiring fast response times.

Replacement Considerations

Direct replacements must match the 110 V breakover voltage and DO-214AC package. Verify equivalent RMS current ratings and holding currents. Cross-reference with other manufacturers offering SIDACs in SMB packages. Ensure thermal characteristics align with the original design constraints.