3SBP 125-R

Package / Case:	3AB, 3AG, 1/4" x 1-1/4" (Axial)
DC Cold Resistance:	16 Ohms
Size / Dimension:	0.272" Dia x 1.280" L (6.90mm x 32.50mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CE, CSA, cULus
Melting I²t:	0.32
Breaking Capacity @ Rated Voltage:	200A
Mounting Type:	Through Hole
Series:	3SBP
Response Time:	Slow
Voltage Rating - AC:	250V
Current Rating:	125mA
Fuse Type:	Cartridge, Glass
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Fuses

Fuses, as a type of electrical protection device, play an important role in ensuring that our power supply systems operate safely and correctly. The 3SBP 125-R is a kind of fuse that is designed to provide optimal protection for sensitive equipment or circuits. Now let\'s take a closer look at this fuse\'s application field and working principle.

Application Field

The 3SBP 125-R is mainly used in electronic equipment that requires reliable protection from surges and short circuits caused by malfunctioning parts. This type of fuse is also ideal for helping to protect against high starting currents from motors and other types of inductive loads. Commonly found applications for the fuse include motor controllers, transformers, surge protection devices, medical equipment, photocopying machines, LED lamps, and solar panels.

Working Principle

The 3SBP 125-R employs a thermal-magnetic activation principle. This means that the fuse\'s current carrying capacity will be limited by two separate working elements—the thermal element and the magnetic element. When a fault or overload condition occurs, the thermal element will respond first and, if the current is not reduced quickly enough, the magnetic element will respond to cut off the current completely.The thermal element utilises a precisely calibrated electric fuse link that is able to detect and respond reliably to minor temperature changes in the circuit. As the current flowing through the link increases, its resistance decreases, and heat is generated, eventually tripping the fuse once the temperature limit is reached.The magnetic element consists of a coil wound on a core of ferromagnetic material. This element is designed to interrupt larger currents almost instantaneously as soon as the current being drawn reaches a hazardous level. When such a level is detected, the coil will generate a magnetic field which will activate the tripping mechanism and directly break the current.

Conclusion

Overall, the 3SBP 125-R is an effective and reliable fuse that is suitable for a wide range of applications. The device\'s thermal-magnetic activation principle makes it ideal for protecting circuits from the effects of overloads or fault conditions of varying levels. With its combination of reliable protection and easy installation, the 3SBP 125-R is an excellent choice for users seeking a highly functional fuse.

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