3552-7

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Fuseholders

Fuseholders are an essential part of electric assemblies, used to securely hold and anchor fuses and, in some cases, display a status indication. Specifically, the 3552-7 fuseholder is used for styles FNM, FNH, FNQ, FNX, and Bussmann series SPI and ECO fuses. The fuseholder ensures safe electrical connections and provides overload protection as well as a visual indication of whether a fuse has blown.

Application field

The 3552-7 fuseholder is used in a variety of applications across many different industries and systems, including: Telecommunications, Automotive & Transportation, Robotics, Process Control, Industrial Equipment, Military/Avionics, Medical Equipment, Construction Robotics, Lighting Control, and Connectors & Cable.

Working Principle

The general working principle of 3552-7 fuse holders is similar to that of other fuse holders. This fuse holder allows extremely fast and easy replacement and is designed for maximum reliability. The holder comprises of two main parts, a contact that is used to connect the fuse to the electrical system and a support that holds it in place.

The contact is normally made out of a metal strip or plate, either a single piece of metal or a pressed metal frame which is bolted to the main support or ‘body’ of the fuse holder. The electrical contacts are typically spring-loaded so as to maintain a reliable connection, even with varying temperatures or temperatures of vibration While the contact can vary from application to application, the contact is typically a copper strip with an insulated sleeve, or a machined contact block.

The body of the fuse holder is typically made out of a plastic material with a metal guide plate that helps guide the fuse into the correct position. The body is secured to the application via either nuts, screws, push-fit terminals, or adhesive. The external appearance can vary from application to application, offering different colors, shapes, sizes, orientation, and mounting rails.

Once the contact is in place and the fuse holder is installed, the fuse is inserted into the holder. The fuse is typically held by one or two sprung clamps located at the two ends. When current passes through the fuse, it burns away at the contact and, when it reaches a preset level, the connection is interrupted and the fuse blows. This interrupts the power flow, ensuring electrical safety.

The 3552-7 fuse holder is designed for maximum safety, reliability, and convenience, as well as providing a visual indicator of whether a fuse has blown or not. This reliable protection from electric overload is an invaluable safeguard for all kinds of electrical assemblies. The fuse holders are often used in a wide range of applications and provide an efficient, secure, and convenient method of protection.

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