ST10005B

Overview

The Littelfuse ST10005B is a radial lead inrush current limiter (ICL) designed to protect electronic circuits from high initial surge currents. It features a resistance of 10 ohms with a tolerance of 20% and supports a continuous current rating of 5 amperes. The component utilizes a cylindrical body with a diameter of 19.05 mm, suitable for through-hole mounting on printed circuit boards.

Feature Summary

• Provides effective limitation of inrush current during power-up sequences
• Utilizes positive temperature coefficient material for self-resetting protection
• Supports continuous operation at rated current levels without degradation

Applications

• Power supply input stages
• Transformer primary side protection
• Capacitive load switching circuits

Procurement Notes

Verify availability status as this specific part number may be discontinued or subject to non-cancelable terms. Confirm exact physical dimensions and lead configuration against the official datasheet before integration. Ensure compliance with RoHS directives if required by your manufacturing standards. Check for alternative equivalents if production continuity is critical.

Selection Notes

Select based on steady-state current requirements and peak surge capacity. Ensure the holding current exceeds the maximum operating current to prevent nuisance tripping. Verify that the cold resistance value aligns with system startup constraints. Consider thermal derating factors for enclosed environments.

Part Context

This component belongs to the family of thermistor-based inrush current limiters manufactured by Littelfuse. These devices are distinct from fuses as they do not require replacement after limiting events. They serve as passive protection elements in general electronics and industrial power systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Littelfuse technical support for direct replacements or cross-reference guides.