MF-R400-2

Product Overview

Category

The MF-R400-2 belongs to the category of resettable fuses, also known as PTC (positive temperature coefficient) thermistors.

Use

It is commonly used for overcurrent protection in various electronic circuits and devices.

Characteristics

• Resettable: The MF-R400-2 can automatically reset after the fault condition is removed.
• Fast response time: It provides quick protection against overcurrent events.
• Package: The fuse is typically housed in a small, surface-mount package.
• Essence: The essence of the MF-R400-2 lies in its ability to protect electronic components from overcurrent situations without requiring replacement after each event.
• Packaging/Quantity: The MF-R400-2 is usually packaged in reels or trays, with quantities varying based on manufacturer specifications.

Specifications

• Maximum Voltage: 30V
• Hold Current: 4A
• Trip Current: 8A
• Operating Temperature Range: -40°C to 85°C
• Dimensions: 3.2mm x 2.5mm x 1.8mm

Detailed Pin Configuration

The MF-R400-2 typically has two pins for surface-mount soldering onto a PCB. Pin 1 is designated for the input connection, while pin 2 is for the output connection.

Functional Features

• Overcurrent Protection: The MF-R400-2 provides reliable protection against overcurrent conditions, safeguarding electronic circuits and components.
• Automatic Reset: After the fault condition is resolved, the fuse resets itself, eliminating the need for manual replacement.

Advantages and Disadvantages

Advantages

• Reusability: Unlike traditional fuses, the MF-R400-2 does not require replacement after a fault event, reducing maintenance efforts and costs.
• Fast Response: It offers rapid protection against overcurrent situations, minimizing the risk of damage to sensitive electronic components.

Disadvantages

• Limited Voltage Rating: The maximum voltage rating of 30V may restrict its use in high-voltage applications.
• Trip Current Limitation: The trip current of 8A may not be suitable for certain high-power circuits.

Working Principles

The MF-R400-2 operates based on the PTC effect, where its resistance increases significantly when subjected to an overcurrent condition. This increase in resistance limits the current flow, providing protection to the circuit.

Detailed Application Field Plans

The MF-R400-2 is widely used in: - Consumer electronics - Automotive electronics - Industrial control systems - Power supplies - Battery management systems

Detailed and Complete Alternative Models

• MF-R050
• MF-R110
• MF-R250

In summary, the MF-R400-2 resettable fuse offers efficient overcurrent protection with its fast response, automatic reset feature, and reusability. While it has limitations in voltage rating and trip current, it finds extensive application across various electronic systems and devices.

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