3AP 7-R Circuit Protection

Package / Case:	3AB, 3AG, 1/4" x 1-1/4" (Axial)
DC Cold Resistance:	0.013 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, PSE
Melting I²t:	141
Breaking Capacity @ Rated Voltage:	200A
Mounting Type:	Through Hole
Series:	3AP
Response Time:	Fast
Voltage Rating - AC:	250V
Current Rating:	7A
Fuse Type:	Cartridge, Glass
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

3AP 7-R application field and working principle

Fuses are a type of overcurrent protection device designed to protect electrical systems and components from excessive current. Since electricity poses a number of hazards, overcurrent protection is an important safety feature for any electrical system or appliance. The 3AP7-R is a particular type of fuse that is designed for high current applications. It is often used in the automotive industry, agricultural machinery, ships, aircraft, military equipment, and industrial machinery.

Construction

The 3AP7-R is a cylindrical fuse with a cylindrical shaped body. Inside the fuse body is a sealed cavity filled with an explosively welded material. The material is typically a copper or brass alloy that is designed to withstand the high temperatures generated when the fuse element experiences an overload. At the top of the fuse body, there are two metal terminals that are used to make the electrical connections.

Operation

The 3AP7-R operates on the same basic principles as other fuses. When an electrical current passes through the fuse, the explosively welded material inside the fuse body generates heat. This heat is dissipated by thermal inertia, and it causes the fuse element to progressively expand in length. As the length of the fuse element increases, the current flow across the device is decreased. When this current reaches a predetermined level, it triggers a "trip point" in the fuse, and this trip point causes the fuse to open and effectively cut off the current flow.

Advantages

The 3AP7-R fuse offers a number of advantages. Its cylindrical shape allows it to be used in tight spaces, and the fact that it is designed for high current applications makes it well suited for a variety of applications. Additionally, it is designed to have a low cost of ownership, as it requires minimal maintenance and has a long service life.

Disadvantages

While the 3AP7-R offers several benefits, it does have some drawbacks. The fuse is not suitable for low-voltage applications, and its cylindrical shape makes it difficult to customize. Additionally, if the fuse element experiences an overload, it may cause damage to the fuse body and its sealant, which could lead to dangerous conditions.

Conclusion

The 3AP7-R fuse is a cylindrical type of fuse designed for high current applications. It has a sealed cavity filled with an explosively welded material, which heats up and expands as an electrical current passes through it. This generates a trip point, which causes the fuse to open and cut off the current flow. The 3AP7-R offers several advantages, such as its cylindrical shape, but it does have some drawbacks that should be taken into consideration.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description