1-pole bi-directional DC NO contactors, max. switching voltage up to 1.500 volts, Ith up to 500 amps
C303 – 1-pole bi-directional DC NO contactors up to 500 amps
The Eddicy C303 1-pole bidirectional DC an AC contactors are compact high-performance switching devices for applications with high inrush currents or large capacities
C303-500 Ecosave, High Efficiency Drive (HED), Precharge
The bi-directional DC and AC contactors of the C303 series are designed for operating voltages up to 1,500 volts and can carry currents of up to 500 amps continuously. Magnetic drives with three coil controls make the contactors versatile for use in modern industrial environments with ambient temperatures of up to 85 degrees. With a short-circuit switching capacity of up to 2,000 amps and a compact design, the C303 contactors are particularly suitable for applications that require high making currents or large capacities, but do not have space for large series. In the event of a short circuit, they can withstand 5,000 amps for 20 milliseconds without contact welding. This allows the contactor to retain its full functionality to disconnect high power independently of the current direction when required. This full bi-directionality is important for systems with energy recovery, i.e., for systems with a charging and discharging process, such as charging stations and ESS applications. Other typical applications include DC circuits in inverters, combiner boxes in photovoltaic systems, battery management for emission-free drive systems, and stationary applications for grid stabilization.
Features
Up to 25% reduction in energy costs for economical
continuous operation
continuous operation
The newly developed main contacts have an extremely low contact resistance of typical 100 microohms. This permanently reduces contact heating, minimizes energy losses in the contactor, and significantly increases the efficiency of the main contact system. The low contact heating also means that less cooling is required. This leads to significantly reduced total cost of ownership (TCO).
Safe arc extinguishing – no risk of explosion
As a compact air contactor with permanent magnet arc extinguishing without gas encapsulation, the C303 compensates for overpressure. This ensures long, trouble-free operation in demanding environments.
V2G-ready for bi-directional charging stations
Bi-directional contactors are required for the perfect interaction between electric vehicles and charging stations. These enable electric vehicles not only to charge, but also to feed electricity into the grid or use it for the domestic power supply.
Optimal integration and performance thanks to
magnetic drives
magnetic drives
- The C303 series is available with 3 coil controls: Ecosave drive with energy-saving PWM module for optimum power consumption during switching and low heating during holding
- High-Efficiency Drive (HED) with optimized coil for maximum efficiency without PWM module or for external PWM control, and
- Precharge to limit high inrush currents of main contactors.
Full bi-directionality – reliable disconnection of high performances
All versions of the C303 can reliably switch high currents and voltages when required, regardless of the direction of current flow. These properties are achieved through the special arrangement of blow magnets and arcing chambers.
Mirror contact function for maximum operational reliability
The C303 contactors have an integrated auxiliary contact with mirror contact function according to IEC 60947-4-1, annex F.
Mirror contacts are required in feedback circuits of safety
controls. The mirror contact function informs about the switching state and ensures that the NC contact of the auxiliary contact is not closed at the same time as the NO main contact.
1 contactor, 3 versions
The switching devices are available with 3 coil controls:
- Ecosave:
With energy-saving PWM module for optimum power consumption when switching and low heating when holding
- High Efficiency Drive (HED):
With economical drive without PWM module for maximum efficiency
- Precharging contactor or for external PWM control:
For limiting high making currents and to protect main contactors, special variant without economy circuit
Applications
The compact C303 series fits into applications with limited space. The contactors switch reliably in both directions – ideal for energy recovery. Typical applications include regenerative systems, DC charging stations, battery test benches, and stationary energy storage systems. Bi-directional contactors are required in these applications because batteries are charged and discharged cyclically.
Applications for e-mobility
- DC fast charging stations
- Battery test benches for the automotive industry
- Battery management for zero-emission propulsion systems in maritime applications and DC charging on and off-shore
Industrielle Anwendungen
- Grid stabilization and battery energy storage
- Regenerative systems in industrial plants
- Battery management systems
- Uninteruptable Power Supplies (UPS)
- Photovoltaics
Specifications
C303
| Type of voltage | DC bi-directional / AC (f ≤ 60 Hz) |
| Main contacts, configuration | 1 NO |
| Max. switching voltage U | 1,500 V |
| Rated insulation voltage Ui | 1,000 V @ PD3 1,500 V @ PD2 |
| Rated impulse withstand voltage Uimp | 10 kV |
| Pollution degree Overvoltage category |
PD2, PD3, see Ui OV2 |
| Conv. thermal current Ith | 350 A, 500 A |
| Aux. contact | 1x SPDT max. with mirror contact function: AC-15: 230 VAC/1.0 A; DC-13: 60 VDC/0.5 A |
| Coil |
|
| Shock / Vibration | IEC 61373: Category 1, Class B |
| Mounting orientation | horizontal, vertical |
| Temperature range | –40° C … +85° C |
| Mechanical endurance | 200,000 operations |
Certifications and approvals
/en/products/contactors/c303/thank-you/C303 – DC bi-directional switchingContactors