SPP-4B400

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SPP-4B400 is a special type of electrical fuse designed for applications where compact size and high current rating are required. It is characterized by both its high amperage rating (400A) and small size. This fuse is perfect for applications like protection of panelboards, buses, and other motor-circuit loads. By providing a high current interruption capability in a small package, the SPP-4B400 offers a cost-effective solution for circuit protection.

The SPP-4B400 is designed to meet UL\'s standard 248-14. This standard defines the requirements for the design and construction of special purpose fuses. In accordance with this specification, the SPP-4B400 must meet several requirements including ripple current capability, interrupting rating, current-limiting time, over-current trip current, and response time. All of these requirements are designed to ensure the fuse\'s performance and safety.

The SPP-4B400 is designed to provide protection against both over-voltage and over-current. The fuse is fitted with a bi-metallic element which allows it to rapidly open in the event of an over-current situation. This element is specifically designed to respond quickly to large current surges and prevent further damage to the electrical equipment. The over-voltage protection feature is provided by the use of a voltage sensitive element which can detect and respond to over-voltage situations.

The SPP-4B400 also provides a unique feature called "open-fuse detection". This feature is designed to detect a fault on the fuse itself and open the circuit automatically. This is done by monitoring the current flowing through the fuse and shutting off the circuit when a predetermined level is exceeded. This is especially useful in applications where a device or machine may continue to function even after a fuse has failed, resulting in potential equipment damage or injury.

In addition to providing protection against over-voltage and over-current, the SPP-4B400 also offers a short-circuit protection feature. The fuse is designed to shut off the circuit automatically if a short-circuit is detected. This feature helps protect against the potentially destructive effects of short-circuits, such as melting of wires, burning of components, and arcing.

The SPP-4B400 is an ideal solution for applications where both space and cost savings are important. This electrical fuse is small enough to fit into tight spaces, yet it still offers a high current rating which makes it suitable for a variety of applications. In addition to its cost-effective design, the SPP-4B400 also offers several protection features, such as open-fuse detection, over-voltage protection, and short-circuit protection. All of these features combine to make the SPP-4B400 a great choice for circuit protection applications.

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