Schaltbau High-Power DC Switching

Built to survive the worst case, not just the spec sheet.

Schaltbau has spent nearly a century on the hardest problem in DC power: making and breaking high voltage, high current DC safely, thousands of times over, where a failure is not an option. Since 1929 they have engineered for environments where ruggedness, survivability, and safety are non-negotiable, championing the standards that hold up under continuous high-stress switching.

That engineering discipline is now built into their industrial DC line. The same contact systems, arc management, and full in-house stack go into the contactors that power BESS, EV fast charging, traction drives, and the grid edge.

That is why we carry this brand. Not because the parts are unusual, but because the survivability engineered into them is the reason they outperform anything a general distributor stocks. The products below are the proof.

BC310-Bidirectional

A single-pole DC contactor that switches the same current safely in both directions.

Single-pole bidirectional DC contactor rated up to 1,500 V. Making capacity up to 2,500 A, continuous current up to 500 A, and short-time current up to 3,000 A for one second without contact welding. An air-system switching chamber, not gas-encapsulated, with auxiliary mirror contacts per DIN EN 60947-4-1 Annex F.

Why it matters
The workhorse for BESS, EV battery packs, traction drives, PV combiner boxes, and bidirectional charging. The bidirectional part is the point, current flows the same in either direction, which gas-encapsulated contactors generally won't do without derating. The air system is simpler to service than a gas-filled equivalent, and the mirror contacts give you a safety-rated state signal back to the controller.
How it differs
Distributor-grade DC contactors are typically rated for current in one direction, often gas-encapsulated (sealed for life, no diagnostics), and tend to weld shut under short-circuit current instead of surviving it.

C305 / C805

The contactor family built specifically for the Megawatt Charging Standard.

A 2025 contactor family for the Megawatt Charging Standard (MCS). The C305/C805 support MCS Level 2 at 1,500 A; the C330/C830 are 3,000 A bidirectional contactors for MCS Level 3. A compact open-isolation concept is designed to prevent rupture under heavy short-circuit conditions.

Why it matters
MCS is the emerging standard for heavy-duty truck and bus DC fast charging, and the contactors that make it work at the stack level are scarce. For anyone building megawatt charging infrastructure, in-vehicle high-power systems, or grid-edge BESS rated for MCS, these are the parts that enable the design at all.
How it differs
There are very few commercial options at the 1,500 A / 3,000 A DC bidirectional level. Most distributor-stocked contactors max out an order of magnitude below this, they aren't a smaller version of the same thing, they're a different class of part.

EDDICY

Pre-charge, main, and isolation contactors for the whole EV charging stack | one vendor.

A family of DC contactors for EV fast charging across cars, buses, and commercial vehicles. Extremely low contact resistance for efficient continuous current, three drive options: PWM coil control for energy savings, a high-efficiency economical drive, or a special pre-charging version, galvanic isolation in emergency disconnect, and breaking capacity up to 1.5 MW.

Why it matters
Lets a machine builder address the full charging stack from one source: a pre-charge contactor on the front end, the main contactor on the DC bus, and an isolation contactor for fault disconnect. The PWM coil drive matters wherever holding current adds up, off-grid or battery-powered chargers especially.
How it differs
Standard distribution contactors don't offer pre-charge variants or PWM coil drives, and each function is usually a different vendor, three relationships and three spec sheets where this is one.