The RF1181-000 is a resettable fuse (PPTC) manufactured by Littelfuse Inc. This device is designed to protect electronic circuits from damage caused by overcurrent conditions. PPTC devices, or polymeric positive temperature coefficient devices, act as a self-resetting fuse. Under normal operating conditions, they exhibit a low resistance. When an overcurrent event occurs, the device heats up, causing a significant increase in resistance, which limits the current flow and protects downstream components. Once the fault is cleared and the power is removed, the device cools down and returns to its low-resistance state, allowing the circuit to resume normal operation.

Applications:

• USB ports
• HDMI ports
• Power supplies
• Portable devices
• Automotive electronics

Features:

• Resettable overcurrent protection
• Compact form factor
• Low initial resistance
• Fast response time to overcurrent events
• RoHS compliant

Benefits:

• Provides reliable and repeatable overcurrent protection
• Eliminates the need for manual fuse replacement, reducing downtime
• Increases product lifespan and reliability
• Cost-effective solution for circuit protection
• Enhances safety by preventing thermal runaway

Additional Details:

The RF1181-000 has a hold current (Ih) of 1.1A and a trip current (It) of 2.2A. It is rated for a maximum voltage of 30V. The device's typical resistance is approximately 0.04 Ohms. The operating temperature range is -40°C to +85°C. PPTC resettable fuses are commonly employed in various electronic devices to protect sensitive components from damage due to overcurrent surges. They offer a reliable and convenient alternative to traditional fuses, as they automatically reset after the fault condition is resolved. The RF1181-000 is suitable for use in a wide range of applications, including consumer electronics, computer peripherals, and industrial equipment. Its compact size and robust performance make it an ideal choice for protecting electronic circuits from overcurrent faults.