FAQ

When working with DC circuits, it is crucial to use MCBs that are specifically designed and marked with DC ratings. It is important to note that AC MCBs should never be used in DC circuits, as they are not designed to extinguish the arc that is created in DC circuits. Using AC MCBs in DC circuits can lead to overheating of wires, which can ultimately result in a fire. Therefore, it is not safe to assume that AC MCBs can be used in DC circuits solely based on their matching ampere and voltage ratings.

To ensure proper selection of a suitable MCB for a DC circuit, it is essential to first determine the total current of the circuit. Once the current is determined, the appropriate MCB can be selected accordingly. It is important to note that the current rating of the MCB should not exceed the cable's current carrying capacity. Therefore, it is necessary to carefully match the MCB's current rating with the cable's capacity to avoid any potential hazards or damages.

DC miniature circuit breakers (MCBs) are designed to operate within a voltage range of 12 to 1000 volts DC.

Circuit breakers in DC circuits serve two main purposes: protecting individual loads that operate on DC power, and safeguarding primary circuits such as those found in inverters, solar PV arrays, or battery banks.

DC circuit breakers are commonly available in several types, including Miniature Circuit Breakers (MCBs), Molded Case Circuit Breakers (MCCBs) designed specifically for DC applications, and Type B Residual Current Devices (RCDs). These circuit breakers are used to provide protection for various types of DC circuits, including individual loads and primary circuits in applications such as solar PV arrays, battery banks, and inverters.