S201E

Overview

The Littelfuse S201E is a silicon avalanche-rated Zener diode designed for high-voltage transient suppression applications. It features a nominal breakdown voltage of 200V with a maximum reverse leakage current specified at low voltage levels to ensure minimal power loss in standby conditions. The device is constructed using robust silicon planar technology, providing reliable performance under repetitive surge conditions. Key electrical characteristics include a peak pulse power dissipation rating suitable for protecting sensitive circuitry against fast transients, while maintaining stable regulation across the operating temperature range.

Feature Summary

• Avalanche-rated construction for handling repetitive energy surges
• Low reverse leakage current for efficient standby operation
• Planar silicon technology for consistent thermal stability

Applications

• High-voltage transient protection in industrial control systems
• Surge suppression in power supply input stages
• Voltage reference stabilization in precision measurement equipment

Procurement Notes

Verify the specific suffix codes on the component marking to confirm exact breakdown voltage tolerance and package variant. Cross-reference the manufacturer's latest datasheet revision to ensure compliance with updated environmental standards and RoHS directives before finalizing procurement orders.

Selection Notes

Select this component when circuit design requires precise clamping at approximately 200V with high surge capability. Ensure the expected transient energy does not exceed the device's peak pulse power rating. Consider thermal derating factors if the operating ambient temperature exceeds standard specifications.

Part Context

This part belongs to Littelfuse's series of high-voltage Zener diodes engineered for rugged environments. It complements lower voltage variants by offering specialized protection for mid-range high-voltage rails where standard TVS diodes may lack sufficient breakdown voltage margins or avalanche endurance.

Replacement Considerations

Direct substitutes must match the 200V nominal breakdown voltage and similar peak pulse power ratings. Verify pinout compatibility and package dimensions to ensure mechanical fit without redesigning the PCB footprint.