2920L125PR

The 2920L125PR is a specific model of a fuse manufactured by Littelfuse Inc., a well-known company specializing in circuit protection and electronic components. This particular fuse is designed for use in various electrical applications where overcurrent protection is essential.

Detailed Description:

1. Type and Function:

   • The 2920L125PR is a resettable fuse, also known as a polymeric positive temperature coefficient (PPTC) device. It is designed to protect circuits from overcurrent conditions by increasing its resistance significantly when a fault occurs, thereby limiting the current flow.

2. Specifications:

   • Voltage Rating: The fuse typically has a voltage rating that allows it to operate safely in circuits up to a specified maximum voltage, which is crucial for ensuring that it can handle the electrical load without failing.
   • Current Rating: The "125" in the model number indicates that this fuse is rated for a hold current of 125 mA (milliamps). This means it can carry this current continuously without tripping.
   • Trip Current: The device will trip (increase resistance) at a certain threshold, which is usually higher than the hold current, providing a safety margin for transient conditions.

3. Physical Characteristics:

   • Package Type: The 2920L125PR is typically housed in a compact, surface-mount package, making it suitable for modern electronic circuit designs where space is a premium.
   • Dimensions: While specific dimensions can vary, it generally features a small footprint, allowing for easy integration into printed circuit boards (PCBs).

4. Material and Construction:

   • The fuse is constructed from a polymer material that exhibits a positive temperature coefficient. This means that as the temperature increases (due to excessive current), the resistance of the fuse increases, effectively limiting the current flow and protecting the circuit.

5. Applications:

   • The 2920L125PR is commonly used in consumer electronics, telecommunications, automotive applications, and other electronic devices where overcurrent protection is necessary. It is particularly useful in applications where space is limited and reliability is critical.

6. Resettable Feature:

   • One of the key advantages of the 2920L125PR is its resettable nature. After the fault condition is removed and the device cools down, it automatically resets itself, allowing normal operation to resume without the need for replacement.

7. Compliance and Standards:

   • Littelfuse products, including the 2920L125PR, often comply with various industry standards and regulations, ensuring that they meet safety and performance requirements for electronic components.

In summary, the 2920L125PR from Littelfuse Inc. is a reliable, compact, and efficient resettable fuse designed to protect electronic circuits from overcurrent conditions, making it an essential component in modern electronic designs.