MF-R400-2-14-99

Product Overview

Category

The MF-R400-2-14-99 belongs to the category of resettable fuses, also known as PTC (positive temperature coefficient) thermistors.

Use

These fuses are commonly used for overcurrent protection in various electronic circuits and devices.

Characteristics

• Resettable: The fuse can automatically return to its normal state after the fault condition is removed.
• Fast response time: Provides quick protection against overcurrent events.
• Compact package: Designed for space-constrained applications.
• High current handling capacity: Capable of withstanding high fault currents.

Package

The MF-R400-2-14-99 is typically available in a surface-mount package, making it suitable for automated assembly processes.

Essence

The essence of the MF-R400-2-14-99 lies in its ability to provide reliable overcurrent protection while offering the convenience of automatic reset functionality.

Packaging/Quantity

These fuses are usually supplied in reels or tape and reel packaging, with quantities varying based on manufacturer specifications.

Specifications

• Hold Current: 4.0A
• Trip Current: 8.0A
• Max Voltage: 30V
• Operating Temperature Range: -40°C to 85°C
• Resistance: <0.1Ω

Detailed Pin Configuration

The MF-R400-2-14-99 typically features two pins for surface-mount soldering onto the circuit board. The pinout configuration is as follows: - Pin 1: Connected to the positive terminal of the circuit - Pin 2: Connected to the load or downstream circuitry

Functional Features

• Overcurrent Protection: Automatically limits the current flow during overcurrent conditions.
• Automatic Reset: Returns to a low-resistance state once the fault is cleared.
• Thermal Sensing: Responds to changes in temperature, providing additional protection against overheating.

Advantages and Disadvantages

Advantages

• Reusability: Can be reset multiple times, reducing the need for replacement.
• Space-saving: Compact design ideal for miniaturized electronic devices.
• Fast Recovery: Restores normal operation quickly after a fault event.

Disadvantages

• Limited Voltage Rating: Not suitable for high-voltage applications exceeding 30V.
• Temperature Sensitivity: Performance may vary in extreme temperature environments.

Working Principles

The MF-R400-2-14-99 operates based on the PTC effect, where its resistance increases significantly when subjected to overcurrent conditions. This increase in resistance limits the current flow, protecting the circuit from damage. Once the fault is removed, the device cools down and returns to a low-resistance state, allowing normal current flow.

Detailed Application Field Plans

The MF-R400-2-14-99 is widely used in various applications, including: - Consumer Electronics: Protection of battery packs, USB ports, and power supplies. - Automotive Electronics: Overcurrent protection in vehicle control units and infotainment systems. - Industrial Equipment: Safeguarding control circuits and motor drives from overcurrent events.

Detailed and Complete Alternative Models

• MF-R200-2-14-99: Lower hold and trip currents for applications requiring lower power dissipation.
• MF-R500-2-14-99: Higher current handling capacity suitable for heavy-duty industrial applications.
• MF-R600-2-14-99: Extended voltage rating for use in higher voltage circuits.

In conclusion, the MF-R400-2-14-99 resettable fuse offers reliable overcurrent protection with the added benefit of automatic reset functionality. Its compact design and fast response make it a preferred choice for various electronic applications.

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