3AB 4

Package / Case:	3AB, 3AG, 1/4" x 1-1/4"
DC Cold Resistance:	0.026 Ohms
Size / Dimension:	0.250" Dia x 1.252" L (6.35mm x 31.80mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CE, CSA, PSE, UL
Melting I²t:	36
Breaking Capacity @ Rated Voltage:	200A
Mounting Type:	Holder
Series:	3AB
Response Time:	Fast
Voltage Rating - AC:	250V
Current Rating:	4A
Fuse Type:	Cartridge, Ceramic
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Fuses: 3AB 4 Application Field and Working PrincipleFuses, also known as current-limiting fuses, are used in electrical networks to provide overcurrent protection. Fuses are designed to blow when an overload or short circuit occurs. Fuses are held in place in the circuit by clips, and upon excessive current flow they instantaneously heat up, melting the metal inside and quenching the electrical arc. This interrupts the current flow in the circuit, protecting it from further damage. 3AB Fuses3AB type fuses utilize a dual element design where the blowing times have been determined by application of three ammeters. These fuses are designed primarily to protect electrical equipment from overload currents and short circuits. The 3AB has three standard ratings: 10, 100 and 400 amps. The former two are AC rated, while the 400 is an AC or DC rating fuse. Application Field of 3AB Fuses The 3AB is primarily used in the electrical industry, to protect circuits from overload currents and short circuits. These fuses are commonly found in power distribution systems, circuit breakers, industrial machinery, and residential applications. 3ABs are especially useful in industrial settings because they are designed to be fail-safe and explosively shatter when they blow. This helps to prevent extended overcurrent conditions which might otherwise cause hazardous conditions. Working Principle of 3AB FusesThe 3AB fuse works on the principle of the electric current heating up a metal element which then melts, breaking the circuit and interrupting the current flow. The 3AB is designed with two elements which act independently. An electric current passes through the first element which heats up gradually if the current is too high, eventually melting and breaking the circuit. The second element is designed to be more sensitive and trips much more quickly, protecting the circuit at higher currents. Once the metal elements of the fuses melt, the circuit is interrupted and the current flow is stopped. Conclusion 3AB fuses are an effective form of protection against overloads and short circuits which may occur in an electrical circuit. These fuses work on the principle of the metal elements heating up and melting when a certain current threshold is exceeded. 3AB fuses offer a fail-safe protection option and can be found in industrial settings, power distribution systems, circuit breakers, and residential applications.

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