SSQ 500/5K

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Fuses are an important part of any electrical system, providing essential protection to both the equipment and users. SSQ 500/5K fuses are specifically designed for applications where overvoltage transients may be present, such as solar, EV battery, and electrical vehicle charging station applications. This article will provide a detailed overview of the SSQ 500/5K application field and working principle.

The SSQ 500/5K is specifically designed for protection against overvoltage transients. It utilizes a unique tripping system where a rapid but limited current is allowed to flow through the fuse, keeping it in the non-tripped state. When an overvoltage transient occurs, the amount of current flowing through the fuse increases, exceeding the SQuid threshold set in the fuse. This causes the fuse to trip, so quickly removing the flow of current, thereby protecting the equipment or power source.

The SSQ 500/5K is available in both 400V and 600V ratings and comes with a standard breaking current of 1A. It has a wide range of available amperage ratings from 1A to 63A, and is suitable for both AC and DC applications. The SSQ 500/5K is available in both ceramic and glass body materials, allowing it to fit into most applications.

The working principle of the SSQ 500/5K is based on the SQUID technology (Sensitive Quenching Unit Inertial Device). This entails a construct where two coils act as flux barriers, that react to normal operating current levels and allow energy to pass through the fuse. When an overvoltage transient occurs, the increased current passing through the coils creates a "magnetic bubble" within the principle SQUID circuit, causing the fuse to trip. This is done to protect the system from the effects of an overvoltage.

The SSQ 500/5K also features a fast response time, with a trip point that is detected in only 10 to 20 µS. This allows for reliable protection against overvoltage transients quickly and efficiently. The fuse also provides residual current protection, preventing the occurrence of a short circuit after the first time the fuse trips.

The SSQ 500/5K is suitable for both indoor and outdoor use. With its robust design and high current reliability, the fuse is used in many industrial and commercial applications. It is commonly used in solar projects, EV battery chargers, power supplies, and other high-power applications.

The SSQ 500/5K is a reliable and efficient fuse for protecting equipment and power sources against overvoltage transients. Its fast response time provides effective protection in a variety of applications, and it is designed to meet the strictest international safety standards. With its high current capacity and robust design, the SSQ 500/5K is an excellent choice for many applications.

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