The MF-MSMF200 is a Polymeric PTC (Positive Temperature Coefficient) resettable fuse manufactured by Bourns Inc. These devices are designed to protect electronic circuits from overcurrent conditions. Unlike traditional fuses that need to be replaced after tripping, PTC resettable fuses automatically reset themselves once the overcurrent condition is removed. This makes them ideal for applications where frequent overcurrent events are expected, or where replacing a fuse would be difficult or inconvenient.

Applications:

• USB Ports: Protects USB ports from overcurrent caused by faulty devices or short circuits.
• Portable Electronics: Used in smartphones, tablets, and other portable devices to protect against battery overcurrent.
• Computer Peripherals: Protects computer peripherals such as keyboards, mice, and printers from overcurrent.
• Game Consoles: Protects game consoles from overcurrent caused by faulty controllers or other accessories.
• Power Supplies: Implemented in power supplies to protect against overcurrent conditions.

Features:

• Resettable Fuse: Automatically resets after an overcurrent condition is removed.
• Surface Mount Package: Available in a small surface mount package for compact designs.
• Fast Trip Time: Provides fast overcurrent protection.
• Low Resistance: Offers low resistance under normal operating conditions.
• Agency Approvals: Typically UL, CSA, and TUV approved.
• RoHS Compliant: Complies with RoHS environmental regulations.

Benefits:

• Overcurrent Protection: Provides reliable overcurrent protection for electronic circuits.
• Resettable: Eliminates the need to replace fuses after an overcurrent event.
• Compact Design: Small surface mount package allows for compact and space-saving designs.
• Improved Reliability: Increases the reliability of electronic devices.
• Cost-Effective: Offers a cost-effective solution for overcurrent protection.

Additional Details:

The MF-MSMF200 operates by increasing its resistance dramatically when an overcurrent condition occurs. This limits the current flowing through the circuit and protects it from damage. Once the overcurrent condition is removed, the PTC resettable fuse cools down, and its resistance returns to its normal low value, allowing the circuit to resume normal operation. The trip time depends on the magnitude of the overcurrent. The surface mount package makes it easy to integrate into automated assembly processes. The MF-MSMF200 is a versatile component that provides a reliable and cost-effective solution for overcurrent protection in a wide range of electronic applications. The hold current for this part is 2A, and the trip current is 4A.