Package / Case:	5mm x 20mm (Axial)
DC Cold Resistance:	0.026 Ohms
Size / Dimension:	0.218" Dia x 0.831" L (5.54mm x 21.10mm)
Color:	--
Operating Temperature:	--
Approvals:	CCC, CSA, MITI, UL
Melting I²t:	19
Breaking Capacity @ Rated Voltage:	10kA
Mounting Type:	Through Hole
Series:	GMA
Response Time:	Fast
Voltage Rating - AC:	125V
Current Rating:	4A
Fuse Type:	Cartridge, Glass
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Fuses

BK/GMA-V-4A Application Field and Working Principle

Fuses are safety components designed to protect circuits, equipment, and other components from damage caused by thermal or electrical overload. The BK/GMA-V-4A is a fast-acting, high intensity fuse designed specifically for industrial applications.The BK/GMA-V-4A is a type of fuse that is able to detect and react to rapid changes in current flow. It is composed of two parts—a refractory ceramic body and an assembled metal cover. In order to ensure perfect contact of the components, the assembly is provided with a safety housing and is press-fitted with a special press-fitting nut.The core of the BK/GMA-V-4A is an alloyed iron rod, which is placed in an oxygen-free kiln and heated to approximately 1,400°C, where atomized metal is added. While the rod undergoes thermal expansion, metal is added to form a stable fusing point.The contact pressure of the BK/GMA-V-4A is adjusted by an adjustable screw, which increases or decreases the pressure, depending on the load. When the current flowing through the fuse surpasses the rated value, the metal-alloy rod in the core melts, causing the fusing point to break. This activates the safety device, which insulates the fuse in order to prevent any sparking or danger of system breakdown.The BK/GMA-V-4A is suitable for circuits up to 30 amperes and is approved for IEEE C37.52 (applicable to industrial installations) and IEC-60947-4-1. This type of fuse is used in various industrial applications including machine control, heating circuits, switching systems, and high-voltage electrical systems.The BK/GMA-V-4A is a highly reliable component that provides protection for systems against over-voltage and over-current. It is designed to rapidly detect changes in current flow and react quickly enough to prevent significant damage to the system. It is also a cost effective solution for power management. Its small size and compact design makes it suitable for a wide range of applications. The fuse is usually mounted on a control board or in a separate protective cabinet.

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