RUEF185S

Product Overview

Category

The RUEF185S belongs to the category of resettable fuses, also known as polymeric positive temperature coefficient (PPTC) devices.

Use

It is used to protect electronic circuits from overcurrent and short-circuit conditions by providing a resettable means of interruption.

Characteristics

• Resettable: The fuse can return to its normal state after the fault condition is removed.
• Current Rating: Typically rated for low to moderate current levels.
• Voltage Rating: Designed to operate within specific voltage ranges.
• Temperature Sensitivity: The device's resistance increases with temperature, limiting current flow.

Package

The RUEF185S is available in surface mount packages, commonly in tape and reel format for automated assembly.

Essence

The essence of the RUEF185S lies in its ability to provide reliable overcurrent protection while offering the convenience of automatic reset.

Packaging/Quantity

Typically packaged in reels containing a specified quantity, such as 3000 units per reel.

Specifications

• Current Rating: 1.85A
• Voltage Rating: 60V
• Hold Current: 1.85A
• Trip Current: 3.7A
• Maximum Voltage: 30V
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The RUEF185S features a standard two-terminal SMD configuration, with no polarity considerations.

Functional Features

• Overcurrent Protection: Automatically limits excessive current flow during fault conditions.
• Resettable Operation: Returns to a low-resistance state once the fault is cleared.
• Compact Design: Suitable for space-constrained applications.
• Reliable Performance: Provides consistent protection over multiple fault cycles.

Advantages and Disadvantages

Advantages

• Resettable functionality reduces maintenance and replacement costs.
• Fast response time to overcurrent events.
• Compact size allows for integration into densely populated circuit boards.

Disadvantages

• Limited hold current compared to traditional fuses.
• May have a higher initial cost compared to non-resettable fuses.

Working Principles

The RUEF185S operates based on the PPTC effect, where the polymer material exhibits a sharp increase in resistance when subjected to overcurrent or high temperatures. This increase in resistance effectively limits the current flow, protecting the circuit. Once the fault is removed, the device cools down and returns to a low-resistance state.

Detailed Application Field Plans

The RUEF185S is commonly used in various electronic applications, including: - Consumer electronics - Automotive electronics - Telecommunications equipment - Industrial control systems - Power supplies

Detailed and Complete Alternative Models

• RUEF110: Lower current rating, suitable for more sensitive electronics.
• RUEF250: Higher current rating, ideal for applications with increased power demands.
• RUEF400: Designed for heavy-duty applications requiring robust overcurrent protection.

In conclusion, the RUEF185S offers a reliable and convenient solution for overcurrent protection in diverse electronic applications, making it a valuable component in modern circuit design.

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