MF-RX075/72-0

Product Overview

Category

MF-RX075/72-0 belongs to the category of resettable fuses or PTC (Positive Temperature Coefficient) thermistors.

Use

It is used as a protection device in electronic circuits to limit overcurrent conditions.

Characteristics

• Resettable
• Self-healing
• Low resistance in normal operating conditions
• High resistance when overcurrent occurs

Package

The MF-RX075/72-0 is typically packaged in tape and reel for automated assembly processes.

Essence

The essence of MF-RX075/72-0 lies in its ability to protect electronic circuits from overcurrent events without requiring replacement after each incident.

Packaging/Quantity

It is commonly available in reels containing a specific quantity, such as 2000 pieces per reel.

Specifications

• Hold Current: 0.75A
• Maximum Voltage: 72V
• Trip Current: 1.5A
• Operating Temperature Range: -40°C to 85°C
• Dimensions: 3.2mm x 1.6mm x 0.9mm

Detailed Pin Configuration

The MF-RX075/72-0 has two terminals for connection in the circuit. The pin configuration is as follows: - Pin 1: Connected to the positive terminal of the circuit - Pin 2: Connected to the negative terminal of the circuit

Functional Features

• Overcurrent Protection: When an overcurrent condition occurs, the resistance of the MF-RX075/72-0 increases significantly, limiting the current flow and protecting the circuit.
• Self-Healing: After the overcurrent event is resolved, the MF-RX075/72-0 returns to its low-resistance state, allowing normal operation to resume.

Advantages and Disadvantages

Advantages

• Resettable functionality reduces the need for frequent replacements.
• Provides reliable overcurrent protection in electronic circuits.
• Self-healing feature enhances the longevity of the component.

Disadvantages

• Limited hold current and maximum voltage ratings compared to traditional fuses.
• Sensitive to ambient temperature variations.

Working Principles

The MF-RX075/72-0 operates based on the principle of PTC thermistor behavior. Under normal operating conditions, it maintains a low resistance, allowing current to flow through the circuit. When an overcurrent event occurs, the temperature of the PTC thermistor rises, causing its resistance to increase significantly, thereby limiting the current flow and protecting the circuit. Once the overcurrent condition is removed, the PTC thermistor cools down and returns to its low-resistance state, enabling normal operation to resume.

Detailed Application Field Plans

The MF-RX075/72-0 is widely used in various electronic applications, including: - Battery protection in portable devices - Overcurrent protection in USB power delivery circuits - Protection of communication interfaces in consumer electronics

Detailed and Complete Alternative Models

Some alternative models to MF-RX075/72-0 include: - MF-RX110/72-0 - MF-RX160/72-0 - MF-RX200/72-0 - MF-RX300/72-0

These alternative models offer varying hold currents and trip currents to cater to different application requirements.

In conclusion, the MF-RX075/72-0 resettable fuse or PTC thermistor provides reliable overcurrent protection in electronic circuits, with its self-healing capability and resettable functionality offering distinct advantages in various applications.

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