BK1/MCRS375MA

Response Time:	Slow
DC Cold Resistance:	1.66 Ohms
Size / Dimension:	0.125" Dia x 0.280" L (3.18mm x 7.10mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CSA, UL
Melting I²t:	0.101
Breaking Capacity @ Rated Voltage:	50A AC, 300A DC
Mounting Type:	Through Hole
Package / Case:	Axial
Series:	Microtron® MCRS
Voltage Rating - DC:	125V
Voltage Rating - AC:	125V
Current Rating:	375mA
Fuse Type:	Board Mount (Cartridge Style Excluded)
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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BK1/MCRS375MA Application Field and Working Principle

Fuses are important electrical components used to protect circuit conductors from damage due to excessive current. The BK1/MCRS375MA fuse is a type of agency-rated, medium-duty fuse with a voltage rating of 690 volts. The BK1/MCRS375MA is the most commonly used fuse for medium-duty applications. It is designed to cleanly interrupt any non-normal current up to its rated amperage range of 30 to 60 amperes.

Applications

The BK1/MCRS375MA fuse is most commonly used in commercial, industrial, and residential applications. In commercial applications, the BK1/MCRS375MA is well-suited for indoor feeders and branch circuit wiring, as well as supplying protection to lighting circuits in large facilities. In industrial settings, the BK1/MCRS375MA is great for AC/DC motor controls, transformers, and electric line protection. It is also commonly used in residential settings for 120-volt and 240-volt branch circuits, circuit plug-ins, and swimming pool motors.

Working Principle

A typical BK1/MCRS375MA consists of a metal conductor with a wire core and an external cover of high-temperature glass. This fuse is designed so that when an overcurrent is detected, it produces heat, melting the conductor and causing the flow of current to be interrupted. The external cover contains the material that breaks down, creating an arc of electrons that provides the spark that creates this interruption.When an overload of current is detected, the fuse\'s metal conductor heats up, causing the fusible link (the metal conductor) to get hot enough to combust, melting and opening the circuit. This stops the current flow and consequently protects the equipment from damage due to an overcurrent.

Conclusion

The BK1/MCRS375MA fuse is a medium-duty fuse used for both commercial and residential applications. It is designed to cleanly interrupt non-normal current up to its rated amperage range of 30 to 60 amperes. By introducing heat, it can melt the conductor and thus disrupt the current flow, providing protection from overloads and safeguarding equipment from potential damage.

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