The SMD1206P200TF is a PolySwitch resettable fuse from Littelfuse Inc., designed to protect electronic circuits from overcurrent faults. It is a surface-mount device (SMD) with a compact 1206 footprint, making it suitable for space-constrained applications. The resettable functionality eliminates the need for manual fuse replacement, reducing maintenance and downtime.

Applications

• Power Supplies: Overcurrent protection in power supplies for various electronic devices.
• Industrial Control Systems: Protecting control circuits from electrical surges.
• Security Systems: Ensuring reliable operation of security equipment.
• Lighting Systems: Protecting LED drivers and other lighting components.
• Instrumentation Equipment: Circuit protection in measurement and control devices.

Features

• Surface Mount Device: Designed for automated assembly on PCBs.
• 1206 Package Size: Small footprint for high-density circuit boards.
• Resettable Fuse: Automatically resets after an overcurrent event is cleared.
• Fast Trip Time: Quickly responds to overcurrent conditions.
• Low Resistance: Minimizes voltage drop during normal operation.
• RoHS Compliant: Compliant with environmental regulations for hazardous substances.

Benefits

• Circuit Protection: Prevents damage to sensitive electronic components.
• Reduced Maintenance: Eliminates the need for fuse replacement.
• Improved System Reliability: Ensures continuous operation even after a fault.
• Lower Downtime: Minimizes disruptions due to overcurrent events.
• Space Saving: Compact size allows for efficient use of PCB space.

Additional Details

The SMD1206P200TF has a hold current (Ih) of 2.0 A and a trip current (It) of 4.0 A. It is rated for a maximum voltage of 6 VDC and a maximum interrupt current of 40 A. The operating temperature range is from -40°C to +85°C. The PolySwitch device uses a polymeric positive temperature coefficient (PPTC) material that increases its resistance significantly when an overcurrent event occurs, limiting the current flow and protecting the circuit. Once the overcurrent condition is resolved and the device cools down, the PPTC material returns to its low resistance state, allowing the circuit to resume normal operation.