TR2/1025FA7-R Circuit Protection

TR2/1025FA7-R

Application Field and Working Principle

TR2/1025FA7-R is a dual-element time-delay electrical fuse with a rated voltage of 250 volts. This type of fuse is designed for a variety of applications, including residential, commercial, and industrial settings, as well as for specialized equipment. It has two unique features—its protective action is both time delay and current-limiting—that make it highly suitable for protecting both shunt and series circuits. Moreover, it has enhanced current interruption capabilities when overloaded.

A dual-element fuse has two elements, a time-delay element and a current-limiting element. Each element provides an additional level of protection and plays a vital role in protecting the safety of people, equipment, and property. The main difference between a regular fuse and a dual-element fuse is the ability to delay circuit opening until the current, voltage, or temperature on the over-current side reaches a predetermined level.

The secondary or current-limiting element of TR2/1025FA7-R Fuse has a higher breaking capacity than the primary time-delay element. It turns the electrical current off in less than a second when an overload or short circuit occurs. Primary time-delay element takes up to 100 milliseconds to trigger. This unique feature helps protect more sensitive electronics components and equipment from unexpected short circuits, unwanted electrical surges, and other electrical hazards.

The TR2/1025FA7-R Fuse is designed for currents in the range of 0.6 amperes to 60 amperes and is applicable to both AC and DC circuits. The fuse is suitable for use in areas where temperature does not exceed 85°C and an altitude up to 2000 meters. It features a high-speed action that quickly shuts down the current to prevent arcs when it is overloaded and its relatively low interrupting capacity makes it ideal for protecting both small and large motors. Additionally, the fuse is immune to shock, vibrations, and corrosive environments.

The TR2/1025FA7-R Fuse is ideal for circuit protection in a variety of environments. These include residential, commercial, and industrial settings, as well as for specialized equipment. It is suitable for use on circuits where noise levels may be of a concern, or where high-intensity currents may damage equipment. Its time-delay and thermal/electrical sensing functions provide excellent protection against overloads and short circuits.