FLNR07.5T Fuse

Introduction

The FLNR07.5T fuse is a crucial component in electrical systems, designed to protect circuits from overcurrent conditions. This entry provides an in-depth overview of the FLNR07.5T fuse, including its product category, basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Product Category

The FLNR07.5T fuse belongs to the category of electrical fuses, specifically classified as a time-delay, Class RK5 dual-element fuse.

Basic Information Overview

• Use: The FLNR07.5T fuse is utilized for protecting electrical circuits and equipment from overcurrent conditions.
• Characteristics: It exhibits time-delay characteristics, allowing it to withstand temporary overloads without sacrificing protection.
• Package: The fuse is typically available in a cylindrical, non-renewable cartridge format.
• Essence: Its essence lies in providing reliable overcurrent protection while accommodating temporary inrush currents.
• Packaging/Quantity: The FLNR07.5T fuse is commonly packaged individually or in bulk quantities suitable for various applications.

Specifications

• Current Rating: 7.5A
• Voltage Rating: 250V AC/DC
• Interrupting Rating: 200kA RMS Symmetrical
• Operating Temperature: -40°C to 70°C
• Agency Approvals: UL Listed, CSA Certified

Detailed Pin Configuration

The FLNR07.5T fuse features a standard cylindrical body with ferrule-style end caps, facilitating easy installation into compatible fuse holders. The detailed pin configuration includes the dimensions and tolerances of the ferrule ends, ensuring proper fitment within the designated fuse holder.

Functional Features

• Time-Delay Operation: Enables the fuse to tolerate short-duration overcurrents without unnecessary tripping.
• Dual-Element Design: Provides enhanced protection against low-level and high-level faults, reducing nuisance openings.
• High Interrupting Rating: Ensures safe interruption of fault currents, minimizing potential hazards.

Advantages and Disadvantages

Advantages

• Reliable overcurrent protection
• Suitable for circuits with inrush currents
• Enhanced fault tolerance due to time-delay operation

Disadvantages

• Relatively larger physical size compared to fast-acting fuses
• Limited suitability for extremely high voltage applications

Working Principles

The FLNR07.5T fuse operates based on the principle of thermal and magnetic effects. When subjected to overcurrent conditions, the fuse element heats up, causing it to melt and interrupt the circuit. The time-delay characteristic allows the fuse to withstand temporary overloads, making it suitable for applications with inrush currents.

Detailed Application Field Plans

The FLNR07.5T fuse finds extensive use in various electrical systems, including: - Motor control circuits - Industrial machinery - Power distribution panels - Control panels for HVAC systems - Renewable energy systems

Detailed and Complete Alternative Models

Several alternative models can serve as substitutes for the FLNR07.5T fuse, including: - Littelfuse FLNR_ID series - Bussmann FRN-R series - Mersen TRS-R series - SIBA 189140 series

In conclusion, the FLNR07.5T fuse stands as a reliable solution for overcurrent protection in diverse electrical applications, offering time-delay characteristics and robust performance. Its specifications, functional features, and application versatility make it a valuable component in safeguarding electrical circuits and equipment.

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