The FRU135-30F is a Polymeric Positive Temperature Coefficient (PPTC) resettable fuse manufactured by RFE/Fuzetec. Also known as a polyswitch or multifuse, this device protects electronic circuits from overcurrent conditions. Unlike traditional fuses that blow and need replacing, a PPTC fuse increases in resistance dramatically when a fault current flows, limiting the current. Once the fault is removed and power is cycled, the device resets to its low-resistance state.

Applications

• USB port protection
• Hard disk drives
• Mobile phones and smartphones
• Game consoles
• Power supplies

Features

• Resettable overcurrent protection
• Compact size
• Low resistance
• Fast trip time
• RoHS compliant

Benefits

• Eliminates the need for fuse replacement, reducing maintenance costs.
• Protects sensitive electronic components from damage due to overcurrent.
• Improves product reliability and reduces warranty claims.
• Saves space on the circuit board due to its small footprint.
• Complies with environmental regulations, ensuring safe disposal.

Additional Details

The FRU135-30F PPTC resettable fuse offers a hold current of 1.35A and a trip current of 3.0A. Its compact size makes it suitable for applications where board space is limited. The low resistance of the device minimizes power dissipation during normal operation. The fast trip time ensures quick protection against overcurrent faults. This resettable fuse is widely used in portable electronic devices and power supplies to prevent damage from short circuits and overloads. The device operates by undergoing a phase change when heated by the overcurrent. This transition causes a large increase in resistance, effectively limiting the current flow. Once the overcurrent condition is removed, the device cools down and returns to its low-resistance state, ready to protect the circuit again. The FRU135-30F is a reliable and cost-effective solution for overcurrent protection in a wide range of electronic applications.