The 30R135SUU is a resettable fuse (PPTC - Polymeric Positive Temperature Coefficient) manufactured by Littelfuse. These devices are designed to protect electronic circuits from overcurrent conditions by limiting the current flow during a fault and automatically resetting when the fault is cleared.

Applications

• USB port protection
• Power supply protection
• Motor protection
• Speaker protection
• Battery protection

Features

• Resettable fuse (PPTC)
• Surface mount package
• Fast trip time
• Low resistance
• RoHS compliant

Benefits

• Overcurrent Protection: Protects circuits from damage due to overcurrent or short circuit conditions.
• Automatic Reset: Resets automatically after the fault is cleared, reducing downtime and maintenance.
• Surface Mount Design: Facilitates easy and efficient PCB assembly.
• Fast Response: Quick trip time ensures rapid protection during fault conditions.
• Reliable Performance: Provides consistent and reliable overcurrent protection.

Specifications

The 30R135SUU has a hold current of 1.35A and a trip current typically higher than that. The voltage rating and trip time depend on the severity of the overcurrent condition. The device's resistance increases sharply when tripped, limiting the current. It returns to its low-resistance state once the overcurrent condition is removed and the device cools down. Consult the Littelfuse datasheet for specific voltage, current, and trip time characteristics.

This resettable fuse is commonly used in a variety of electronic devices and systems to provide reliable and automatic overcurrent protection, enhancing the safety and reliability of the products in which it is implemented.