MF-R250 Overview

Product Category

The MF-R250 belongs to the category of resettable fuses, also known as PTC (positive temperature coefficient) thermistors.

Basic Information Overview

• Use: The MF-R250 is used for overcurrent protection in various electronic circuits and devices.
• Characteristics: It exhibits a resettable function, allowing it to return to its normal state after the overcurrent condition is removed.
• Package: The MF-R250 is typically housed in a rectangular polymer package with two leads for connection.
• Essence: Its essence lies in providing reliable overcurrent protection without the need for replacement after a fault condition.
• Packaging/Quantity: It is commonly available in reels or bulk packaging, with quantities varying based on manufacturer specifications.

Specifications

• Operating Voltage: Typically rated at 30V DC
• Hold Current: Ranges from 2.5A to 3.0A
• Trip Current: Varies between 5A to 10A
• Operating Temperature: -40°C to 85°C

Detailed Pin Configuration

The MF-R250 features a standard two-pin configuration, with one pin designated for input and the other for output.

Functional Features

• Resettable Function: After tripping due to overcurrent, the MF-R250 resets automatically when the fault is removed, eliminating the need for manual replacement.
• Overcurrent Protection: It effectively limits the current flow during fault conditions, safeguarding the circuit and connected components.

Advantages and Disadvantages

Advantages

• Resettable functionality increases product lifespan.
• Provides reliable overcurrent protection.
• Eliminates the need for frequent fuse replacements.

Disadvantages

• Higher initial cost compared to traditional fuses.
• Limited response time compared to some non-resettable fuses.

Working Principles

The MF-R250 operates based on the principle of PTC thermistor behavior. When subjected to an overcurrent condition, the device heats up, causing its resistance to increase significantly, thereby limiting the current flow. Once the fault is removed, the device cools down and returns to its low-resistance state.

Detailed Application Field Plans

The MF-R250 is widely used in various electronic applications, including: - Power supplies - Battery packs - Automotive electronics - Industrial control systems

Detailed and Complete Alternative Models

• MF-R160: Lower hold and trip currents suitable for smaller-scale applications.
• MF-R500: Higher current ratings for heavy-duty industrial applications.
• MF-R050: Lower current ratings for more sensitive electronic circuits.

In conclusion, the MF-R250 resettable fuse offers reliable overcurrent protection with the added advantage of resettable functionality, making it a popular choice in diverse electronic applications.

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