MS 750

Package / Case:	Axial
DC Cold Resistance:	0.55 Ohms
Size / Dimension:	0.125" Dia x 0.280" L (3.18mm x 7.10mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CE, CSA, cURus
Melting I²t:	0.46
Breaking Capacity @ Rated Voltage:	50A AC, 300A DC
Mounting Type:	Through Hole
Series:	MS
Response Time:	Slow
Voltage Rating - DC:	125V
Voltage Rating - AC:	125V
Current Rating:	750mA
Fuse Type:	Board Mount (Cartridge Style Excluded)
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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MS 750 Application Field and Working Principle

Introduction

MS 750 fuses are widely-used and reliable protection devices for medium-voltage circuits and motor circuits. The fuses, rated at 750 volts, are time-delay fuses that provide over-current protection to protect the circuit and associated equipment from damage due to overloading. The MS 750 fuse features a very high breaking capacity of up to 130kA at lowest voltage, which provides superior protection for a wide variety of applications.

Applications

The MS 750 fuses are usually used in medium-voltage circuits. They can provide effective protection for industrial equipment like transformers, generators, motors, switchgear, and various control systems. These fuses can also be used in higher-voltage circuits, but must be sized appropriately. In addition, the MS 750 fuses can be used in low voltage applications, such as lighting circuits and domestic appliances.

Operation Principle

The MS 750 fuses are based on the thermal-magnetic principle, which includes both time-delay and instantaneous protective elements. The thermal element of the fuse is designed to sense the current flowing through the fuse. When an over-current situation occurs, the fuse\'s protective element heats up and eventually melts. The time it takes for the fuse to melt depends on the magnitude of the current, with higher currents causing shorter time-delays before melting. The fuse also features a magnetic element that is designed to respond very quickly to large over-current situations. The magnetic element is calibrated to sense peak currents and to trip very quickly, providing instantaneous protection in the event of a short circuit.

Advantages

The MS 750 fuse provides superior over-current protection due to the combination of its thermal and magnetic elements. The thermal element provides reliable over-current protection, while the magnetic element provides instantaneous protection in the event of a short circuit. The MS 750 fuse also has a high breaking capacity of up to 130 kA, which makes it suitable for a wide range of applications. In addition, the fuse is designed to be user friendly, requiring no special tools or skills to install or maintain.

Conclusion

The MS 750 fuse is a reliable and cost effective protection device for a wide range of applications. The thermal and magnetic elements provide reliable over-current protection, while the high breaking capacity makes it suitable for a wide range of applications. The user-friendly design makes it easy to install and maintain, and the fuse is built to last for many years.

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