The SMD185-2 is a PolySwitch resettable fuse manufactured by TE Connectivity. It's designed as a surface mount device (SMD) for overcurrent circuit protection. This device utilizes polymeric positive temperature coefficient (PPTC) technology to protect against overcurrent and short circuit faults. Once the fault is cleared, the device resets, allowing normal operation to resume. This eliminates the need for manual fuse replacement, improving uptime and reducing maintenance costs.

Applications:

• Power Ports: Protection for power inputs in electronic devices.
• USB Protection: Protecting USB ports in computers, peripherals, and chargers.
• Automotive Electronics: Overcurrent protection in automotive control units and systems.
• Battery Packs: Protection for battery packs in portable devices.
• Industrial Controls: Circuit protection in industrial automation and control systems.
• Consumer Electronics: Protection for various consumer electronics like tablets and smartphones.
• Telecom Equipment: Safeguarding telecom equipment against overcurrent conditions.

Features:

• Surface Mount Device (SMD): Designed for automated assembly on PCBs.
• Resettable Fuse: Automatically resets after the overcurrent condition is removed.
• Solid State: No moving parts for enhanced reliability and long life.
• Low Profile: Compact design for space-constrained applications.
• Fast Trip Time: Rapid response to overcurrent events.
• RoHS Compliant: Compliant with the Restriction of Hazardous Substances directive.

Benefits:

• Circuit Protection: Prevents damage to sensitive electronic components.
• Reduced Downtime: Automatic reset minimizes downtime due to overcurrent faults.
• Lower Maintenance Costs: Eliminates the need for manual fuse replacement.
• Increased Reliability: Solid state design and resettable functionality enhance system reliability.
• Improved Safety: Protects against potential fire hazards caused by overcurrent.

Additional Details:

The SMD185-2 PolySwitch has a hold current of 1.85A and a trip current higher than this value, typically around 3.7A. The maximum voltage rating is typically 6V or 8V, and the interrupt current is around 40A. This part features a very low internal resistance under normal operating conditions to minimise voltage drop. It is crucial to consult the manufacturer's datasheet to ascertain the exact specifications for a given application. The operating temperature range is typically between -40°C to +85°C. The device's small footprint and robust characteristics render it a valuable solution for diverse electronic protection needs.