Applications:	Electrical, Industrial
Melting I²t:	3800
Size / Dimension:	2.717" L x 2.087" W x 3.189" H (69.00mm x 53.00mm x 81.00mm)
Package / Case:	Rectangular, Blade
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	100kA
Operating Temperature:	--
Approvals:	CSA, UR
Class:	--
Features:	Indicating
Series:	--
Response Time:	--
Voltage Rating - AC:	1.3kV
Current Rating:	200A
Fuse Type:	Square
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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170M4439 Application Field and Working Principle

Introduction

The 170M4439 series is a special type of friction-style fuse, designed to protect against magnetic short circuit and electrical overload. It is a 3-in-1 fuse, capable of reliably protecting both AC and DC circuits, and is well suited for use in outdoor applications when connected to a 240/480 VAC 65 A panel board. The 170M4439 features an open contact design, making the fuse suitable for multiple manufacturing configurations. The fuse connects to the panel through a snap-acting mechanism which provides protection from physical shock and vibration. This series of fuse features a wide operating temperature range and is capable of withstanding extreme temperatures, allowing it to be used in extremely harsh environments.

Applications

The 170M4439 series is a versatile type of fuse and is used in many different applications. It is often used in protection of circuit boards, generators, pumps, line disconnects and transformers. It is also used in motor and air conditioning units, outdoor electrical cabinets, class 1 and 2 circuits, and a variety of other power installations. It is also used extensively in solar and photovoltaic systems to protect against short circuits and electrical overload.

Design Features

The 170M4439 series features an open contact design that makes it suitable for multiple configurations. The open contact design allows for features such as low voltage drop, low locked current and high selectivity. The locking and current rating are adjustable to meet customer requirements. The fuse is easy to install and requires no soldering. The fuse housing is constructed with a glass-filled nylon base and zinc plated steel cover which, combined with the nickel-plated contacts, provides superior performance and protection from corrosion.

Working Principle

The 170M4439 works by detecting an overload or short circuit condition. Upon detecting an overload, the fuse heats up and melts leaving an open circuit. This interrupts the current and prevents damage from occurring to the connected devices. The fuse also acts as a short circuit detector as it can detect a sudden increase in current which can cause an overload and will interrupt the current before an overload can occur.

Conclusion

The 170M4439 is a versatile and reliable fuse designed to protect against overloads and short circuits. It is easy to install and the open contact design allows for low voltage drop and high selectivity. The fuse is suitable for a variety of applications, including generators, motors, air conditioning units, outdoor electrical cabinets, solar and photovoltaic systems and many more. The 170M4439 fuse is a reliable and cost-effective solution for providing overload and short circuit protection.

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