Littelfuse PolySwitch RUEF Series PPTC Resettable Fuse, 30V, 2.5A, 5A, 10.3s, 5

The Littelfuse PolySwitch RUEF Series PPTC Resettable Fuse is a state-of-the-art radial-leaded device designed to provide reliable overcurrent protection in a wide variety of electronic applications. Representing one of the most comprehensive ranges of PPTC (Polymer Positive Temperature Coefficient) products available, it offers the perfect balance of voltage rating (30V) and hold current (up to 9A), making it an essential component for safeguarding sensitive circuits.

This fuse is engineered for resettable operation, automatically restoring the circuit once the fault condition is cleared and the device cools down, eliminating the need for manual replacement. It features a compact rectangular form factor with 24AWG leads and a 5.8mm lead spacing, making it highly compatible with high-volume automated electronics assembly processes. The device is constructed from cured, flame-retardant epoxy polymers that meet the stringent UL 94V-0 standard for insulating materials, ensuring both safety and durability.

Key Specifications & Performance

• Hold Current (IH): 2.50A
• Trip Current (IT): 5.00A
• Maximum Voltage (Vmax): 30VDC / 30VAC RMS
• Maximum Interrupt Current (Imax): 100A DC / 70A AC RMS
• Typical Power Dissipation (PD): 1.20W
• Maximum Time to Trip: 10.3 seconds at 12.50A
• Resistance Range (R): 0.020 to 0.040 ohms
• Operating Temperature Range: -40°C to +85°C

Primary Applications

This versatile resettable fuse is ideal for protecting critical components in numerous devices, including satellite video receivers, industrial control systems, transformers, computer motherboards, and modems. It is also perfectly suited for USB hubs, ports and peripherals, IEEE 1394 ports, CD-ROM drives, gaming consoles, battery packs, telephones, fax machines, and both analogue and digital line cards and printers.

With its robust