The MF-USMF172X-2 is a resettable fuse, specifically a surface mountable, polymeric positive temperature coefficient (PPTC) device manufactured by Bourns Inc. These devices are designed to protect electronic circuits from overcurrent conditions. They operate by increasing their resistance dramatically when a fault current flows, effectively limiting the current and preventing damage to downstream components.

Applications

• USB Port Protection: Used extensively to protect USB ports in computers, peripherals, and chargers from overcurrent and short circuit events.
• HDMI Port Protection: Safeguards HDMI ports in televisions, monitors, and other AV equipment.
• Power Supply Protection: Protects low voltage power supplies from overload conditions.
• Battery Packs: Prevents overcurrent in battery packs for mobile phones, tablets, and laptops.
• Game Consoles: Used to protect various ports and internal circuitry.

Features

• Resettable: Unlike traditional fuses, PPTC devices reset automatically once the overcurrent condition is removed and the device cools down.
• Surface Mountable: Designed for automated assembly processes.
• Compact Size: Small form factor allows for use in densely populated circuit boards.
• Low Resistance: Exhibits low resistance during normal operation, minimizing power loss.
• Fast Trip Time: Quickly reacts to overcurrent conditions, limiting the duration of the fault current.

Benefits

• Circuit Protection: Prevents damage to sensitive electronic components from overcurrent conditions.
• Reduced Downtime: Automatic reset capability eliminates the need to replace blown fuses, minimizing downtime and maintenance costs.
• Improved Reliability: Enhances the reliability of electronic products by protecting against electrical faults.
• Cost-Effective: Offers a cost-effective solution for overcurrent protection compared to traditional fuses and circuit breakers.
• Safety Compliance: Helps products meet safety standards related to overcurrent protection.

Additional Details

The MF-USMF172X-2 has a holding current (Ihold) of 0.17A and a tripping current (Itrip) of 0.34A. The maximum voltage rating is 24V. It is compliant with RoHS and REACH environmental standards. The operating temperature range is typically -40°C to +85°C. The device's small size and surface mountable package make it easy to integrate into modern electronic designs. These PPTC resettable fuses offer a reliable and reusable overcurrent protection solution for a wide range of applications.