Load break switches or main switches completely and completely isolate electrical consumers or system components from the electrical supply. They also switch under load or overload. They are used to switch off for maintenance work and to protect systems. The devices in the RH series are modular main load switches with a disconnecting function and are characterized by the high wear resistance of the contacts. The design enables the use of a switch lock and complies with international construction regulations. Properties: modular design, high short-circuit strength and high switching capacity, double-sided double-deck terminals for large conductor cross-sections and busbars, switch position indicator, snap-action switching function when switched on, mounting type: quick fastening on mounting rail, installation position as desired, areas of application: The devices in the RH series can be used universally, for example in industrial and building technology or in domestic installations. Notes: The designation of the devices in the RH series includes both the rated current (first pair of numbers) and the contact design (last pair of numbers), which are listed in the order of normally open, normally closed and changeover. Thus, an 'RH 063-300', for example, has a rated current of 63 A, three normally open contacts but no normally closed or changeover contacts.