BK/AGC-8 Circuit Protection

Package / Case:	3AB, 3AG, 1/4" x 1-1/4"
DC Cold Resistance:	0.014 Ohms
Size / Dimension:	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Color:	--
Operating Temperature:	--
Approvals:	CSA, UL
Melting I²t:	0.152
Breaking Capacity @ Rated Voltage:	200A
Mounting Type:	Holder
Series:	AGC
Response Time:	Fast
Voltage Rating - AC:	250V
Current Rating:	8A
Fuse Type:	Cartridge, Glass
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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BK/AGC-8 Application Field and Working Principle

Fuses, also known as current-limiting fuses, are intended to protect circuits against excessively high current. In general, they are low voltage electrical devices that help protect electrical components or circuits from damage caused by the current overload. Fuses come in a variety of types, including the BK/AGC-8. The BK/AGC-8 is a low profile, type-B, current-limit fuse designed for overcurrent protection of series circuits. It is designed to protect against short-circuits in aircraft and automobiles with low-voltage electrical systems. It is an enclosed-type fuse and it comes with a transparent cover for easier identification of fault.

Working Principle

The BK/AGC-8 is made up of a cylindrical block of metal housed inside a semi-rigid, plastic enclosure. This metal block is composed of two different materials – the fuse element and the fuse holder. The fuse element is a copper-based conductive metal that melts when the current passes through it, while the fuse holder holds the element in place. When the current passing through the fuse exceeds the designed value, it causes the element to heat up. As the element heats up, it melts, interrupting current flow. Once the current is disrupted, the melting element also releases the debris from the holder, effectively isolating and protecting the circuit from further damage.

Applications

The BK/AGC-8 is typically used for overcurrent protection in aircraft and automotive series circuits. It is also used in low voltage power supplies, electronic control logic, where its low-profile design is ideal. The BK/AGC-8 is also widely used in a variety of commercial, communication, and industrial applications. It is especially well-suited to circuits that require precise protection with fast opening and clearing times, such as motor protection relays, diodes, semiconductors, and other temperature-sensitive devices. Its low-profile design is also valuable in such applications, as it can easily fit into small-profile circuit boards that may be exposed to high temperatures or low ambient conditions. The BK/AGC-8 also offers multiple safety features, such as the lock-out feature, which prevents the fuse from closing again after it has been tripped. This feature prevents accidental overloads and is invaluable in circuits with high current demands. Furthermore, the clear cover allows for easy visual fault inspection and faster repairs.

Conclusion

The BK/AGC-8 is a low-profile, type-B, current-limit fuse that is specially designed to provide over-current protection in series circuits. It is used primarily in aircraft and automotive application and is also widely used in commercial, communication, and industrial applications. Its low-profile design makes it suitable for circuits with high current demands and its clear cover for easy fault inspection make it an invaluable safety feature.

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