K1100SRP

Overview

The Littelfuse K1100SRP is a silicon bilateral voltage-triggered switch (SIDAC) designed for high-voltage protection applications. It features a breakover voltage range of 104V to 118V and operates within a junction temperature range of -40°C to 125°C. The device supports a peak output current of 1A and maintains a maximum holding current of 150mA. Packaged in the DO-214AA (SMB) surface-mount format, it provides reliable switching characteristics for overvoltage suppression circuits.

Feature Summary

• Bilateral voltage-triggered switching capability for AC or DC circuit protection
• Surface-mount DO-214AA package design for automated assembly integration
• High thermal stability with operation up to 125°C junction temperature

Applications

• Overvoltage protection in industrial control systems
• Triggering elements for thyristor-based surge protection devices
• Protection circuits in consumer electronics requiring high-voltage isolation

Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or certified partners. Confirm that the received units match the K1100SRP marking and DO-214AA package specifications. Ensure storage conditions comply with manufacturer guidelines to prevent moisture sensitivity issues prior to soldering. Request batch-specific test reports if required for critical safety certifications.

Selection Notes

Select this component when a precise breakover voltage between 104V and 118V is required for triggering protective thyristors. The SMB package is suitable for space-constrained PCB layouts. Consider the 1A peak current rating against expected surge loads. Evaluate the 150mA holding current to ensure proper latching behavior in the target circuit topology before finalizing the design.

Part Context

The K1100SRP belongs to the Littelfuse SIDAC family of silicon bilateral switches. These components are engineered to protect sensitive electronics from transient overvoltages by conducting current once a specific threshold is exceeded. The series offers various voltage ratings to accommodate different system requirements while maintaining consistent switching performance and reliability standards.

Replacement Considerations

Cross-reference with other SIDACs offering similar 104-118V breakover ranges and DO-214AA packages. Verify electrical parameters such as peak current and holding current match the original design requirements. Ensure thermal characteristics and package dimensions are compatible with existing footprints.