The C303 is a single-pole, bi-directional DC and AC contactor engineered for demanding high-power applications. Designed to handle up to 1500 V and continuous currents up to 500 A, the C303 delivers reliable performance for fast-charging infrastructure, energy storage systems, and industrial DC applications.
Featuring newly developed main contacts with ultra-low contact resistance of just 100 micro-ohms, the C303 significantly reduces power losses and contact heating-resulting in up to 25% energy cost savings and less cooling effort over continuous operation.
Safety and reliability are at the core of the C303''s design. Its permanent magnetic arc blow-out enables safe arc extinguishing without gas encapsulation, eliminating explosion risks and compensating overpressure. An IEC-compliant integrated mirror contact (IEC 60947-4-1) provides dependable feedback for safety loops, while predictable switching behavior ensures stable operation in high-power DC and AC systems.

Schaltbau is a global industry leader specializing in DC power and providing products and solutions that that enable electrification. With a broad portfolio of contactors, connectors, switches, and safety components, Schaltbau helps partners and customers solve today''s challenges in rail, energy, and e-mobility. Built on nearly a century of experience, Schaltbau is headquartered in Munich, Germany and represented globally, with over 1,000 employees worldwide.

The innovative core of the new CT series is the electric arc control technology: in contrast to contactor concepts purely based on electro­magnetic blowout, the arcs created at the moment of switching off are ignited in powerful permanent-magnetic blowout fields.

Thus the dwell periods in the contact zones are limited to an absolute minimum. This leads to a significant reduction in arc-related burn-up when switching off. The lower degree of wear on the contacts makes it possible to greatly increase maintenance intervals.

The CT contactor concept is flexible and can, for instance, be adapted to suit the needs of the customer with regard to the number of contacts, the design of auxiliary contacts and the connection technology.

Due to their technical superiority, economical benefits, compactness and versatility, the CT1000 power contactors are simply predestined for use in the railway industry.

As a specialist for DC applications, we produce connectors, snap action switches and contactors to industry recognised safety standards.
Our goal: safety for men and machines.

New Energy - Special Switchgear Solutions In the dynamic renewables market the trend is towards more energy efficiency. One means to achieve this is by increasing the system's operating voltage. With this end in view, Schaltbau has developed special switchgear for AC and DC applications capable of handling higher voltages and extinguishing the electric arcs that result from them. Thus Schaltbau switching devices provide safe and reliable emergency shut-down of the plant. More safety and efficiency for your system!

Schaltbau NExT Factory - Excellence in processes

Schaltbau NExT Factory -Technology driven

Energy transition requires ideas and a pioneering spirit. With this in mind, Schaltbau has built the NExT Factory from scratch. The factory will be almost completely supplied by a direct current network.To achieve this, we connect the PV system with 1,300 kW peak directly to the energy storage systems and consumers.

• The connected load from the public grid decreases depending on the application by up to 70%
• Conversion and transmission losses are minimally reduced. As a result, a DC network is up to 15% more efficient than a three-phase network.
• In combination with an intelligent energy management system and a combination of energy and heat storage, we reduce the energy costs of our NExT Factory by 35 percent.

DC contactors from Schaltbau ensure safe galvanic isolation between vehicle and charging point. They also switch when subjected to a full load in the event of danger.

Schaltbau power contactors ensure low-wear and reliable switching of both extremely low and very high loads. This makes them suitable for load breaking on both the DC and AC ends of inverters in wind turbines.

The use of direct current in the case of solar plants and wind turbines, energy stores and charging stations has plenty of advantages in terms of efficiency. However, safe switching under the use of direct current places high requirements on electromagnetic components: They must be able to keep high voltages and electric arcs occurring under the use of DC applications under control and to reliably switch them off. Schaltbau is one of the few direct-current experts worldwide with decades of expertise. In close cooperation with our customers, we devise solutions for energy conversion, storage and utilisation that are more efficient and environmentally compatible. As a sophisticated customer, you will receive switchgear for the energy revolution, thereby provided a high level of efficiency and reliability for your system.

Used as main contactors in the Battery Disconnect Unit (BDU) the high power contactors from Schaltbau ensure safety for passengers and the vehicle throughout driving, braking or in case of emergency. Learn more about our solutions for safe electromobility in our new video and get first impressions about our new contactor innovations C800 and C320.