BK/MDQ-9

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Fuses are essential components of electrical protection systems. Overcurrent protection is used to protect circuits from undesirable currents that could cause insulation damage, overloads, or even fires. While fuses are the common overcurrent protection device used in many applications, an alternate technology called the BK/MDQ-9 Circuit Breaker is available.

The BK/MDQ-9 Circuit Breaker is a thermally operated overcurrent protection device which is designed to provide protection for high specification and highly reliable circuits that require long contact life, high close-in capability, and fast protection times. The BK/MDQ-9 Circuit Breaker features a mechanical construction that is lighter and more compact than traditional fuses. It utilizes a rapidly dissipating material to provide high performance overcurrent protection even in extremely harsh environments.

The BK/MDQ-9 Circuit Breaker is typically used in military, aerospace, the medical device industry, and other high-end applications. It is ideal for applications that require full load protection, such as motor overcurrent protection. It can also provide protection for higher voltage applications, such as electronics and medical equipment. In applications where space is a limiting factor, such as panelboard assemblies for industrial equipment, the BK/MDQ-9 Circuit Breaker can be used to provide maximum protection in limited space.

The working principle of the BK/MDQ-9 Circuit Breaker is based on the design of a thermal fuse. A material is placed underneath the bimetallic strip which is heated by an electrical current that passes through the circuit breaker. When the current exceeds a predetermined threshold, the rapidly heating material causes the bimetallic strip to expand and bend in a specific direction, breaking the circuit connection and thus protecting the circuit from overcurrent conditions. The current flowing through the circuit breaker is monitored constantly to detect any sudden changes or overload conditions. If such a condition is detected, the BK/MDQ-9 Circuit Breaker disconnects the current and prevents any further damage or potential fire hazards.

The BK/MDQ-9 Circuit Breaker is designed to provide reliable overcurrent protection and is capable of safely interrupting abnormally high currents very quickly. This makes it an ideal choice for protecting high-end and highly reliable equipment in a wide range of applications. With its fast protection times, high close-in capability, and longer contact life, the BK/MDQ-9 Circuit Breaker is the ideal alternative to traditional fuse protection.

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