An important stipulation of DIN VDE 0100 is to protect cables, lines, and installation devices from overload and short circuits. This requirement can be met using miniature circuit breakers (MCBs). In industrial installations and commercial buildings, they often provide additional protection for equipment and devices, where there are usually higher requirements than in residential buildings. Miniature circuit breakers utilize both the magnetic and heat effects of electrical current. If the current exceeds a safe value during a short circuit, the MCB interrupts the circuit using the magnetic field of an energized coil. The heat generated during continuous overload causes the bimetal to warp, which trips the breaker.

The miniature circuit breaker series DLS 6 offers a wide selection of different types for various application areas. In addition to switches for residential and purpose-built buildings, it also includes switches for industrial applications. The compact design provides ample space for wiring and a large clamping area, along with the option of using conventional wiring rails for easy processing. The series features a large, folding label window and a clearly labeled display for the operating status.

Several additional devices, such as undervoltage or operating current trips and auxiliary and fault indicator switches, enable universal use of the miniature circuit breakers. The DLS 6h design for workshops has a rated short-circuit connection and disconnection capacity of 6 kA, suitable for distribution boards and final circuits, and offers a large selection of rated currents in characteristics B and C. Miniature circuit breakers with characteristic C are primarily suitable for power circuits with high switch-on or peak currents, as their short-circuit trip value is five to ten times the rated current. They replace the former G characteristic.