The MF-MSMF200L-2 is a resettable fuse, also known as a Polymeric Positive Temperature Coefficient (PPTC) device, manufactured by Bourns Inc. It's designed to protect electronic circuits from overcurrent conditions.

Applications

• USB Ports
• Portable Electronics
• Game Consoles
• General Electronics
• Protection of I/O ports

Features

• Resettable: Automatically resets after the overcurrent condition is removed, eliminating the need for manual replacement.
• Surface Mountable: Designed for easy surface mount assembly on printed circuit boards (PCBs).
• Compact Size: Small footprint allows for use in space-constrained applications.
• Fast Trip Time: Quickly trips to limit the current during an overcurrent event.
• Low Resistance: Minimal impact on circuit performance during normal operation due to low on-state resistance.
• Agency Approvals: Typically compliant with industry safety standards such as UL, CSA, and TUV.

Benefits

• Circuit Protection: Protects sensitive electronic components from damage due to overcurrent faults.
• Reduced Downtime: Automatic resetting minimizes downtime and eliminates the need for fuse replacement.
• Cost Savings: Eliminates the cost of replacing blown fuses.
• Increased Reliability: Enhances the reliability of electronic products by providing robust overcurrent protection.
• Simplified Maintenance: Simplifies maintenance by eliminating the need to locate and replace blown fuses.

Additional Details

The MF-MSMF200L-2 has a holding current of 200mA (0.2A) and a trip current significantly higher than the hold current. The trip time depends on the magnitude of the overcurrent, tripping faster with higher currents. The device's resistance increases dramatically when it trips, limiting the current flow. After the fault is removed and power is cycled, the device cools down and its resistance returns to its normal low value, allowing the circuit to resume operation. Refer to the Bourns datasheet for detailed specifications, including voltage ratings, temperature ratings, and precise tripping characteristics. This PPTC device provides reliable and reusable overcurrent protection for various electronic applications.