We Design. We Build. We Deliver.
Engineered for high current capability, hermetic gas suppression, continuous duty cycles, and compliance with UL, CE, and RoHS standards.
An in-depth evaluation of contact resistance, magnetic arc blowout vectoring, and gas ionization control in modern e-Mobility and BESS platforms.
Unlike conventional AC contactors where zero-crossing alternating current aids arc extinction, DC circuits sustain stable plasma arcs during disconnect. Our contactors utilize hermetically sealed ceramic chambers injected with pressurized hydrogen/nitrogen gas mixtures.
Integrated transverse magnetic fields apply a Lorentz force ($F = q(\mathbf{E} + \mathbf{v} \times \mathbf{B})$) directly to the ionized plasma beam, stretching the electrical arc into arc chutes at supersonic speed during abnormal high-current trips.
High voltage DC contactor coils require significant instantaneous energy to overcome strong return springs, but holding power must be minimized to prevent thermal buildup inside compact EV battery junction boxes (BDUs).
Key trade-offs for tier-1 automotive, charging infrastructure, and heavy industrial power distribution buyers.
| Engineering Attribute | Ceramic Hermetic Sealed (Automotive/EV Grade) | Epoxy Sealed Industrial Relays | Standard Open-Frame AC Contactors |
|---|---|---|---|
| Max System Voltage | Up to 1,500 VDC | Up to 1,000 VDC | Up to 690 VAC (Poor DC rating) |
| Arc Suppression Gas | Pressurized Hydrogen ($H_2$) / Nitrogen ($N_2$) mix | Epoxy encapsulate / Ambient gas | Ambient Air (Unsealed) |
| Insulation Resistance | > 1,000 MΩ @ 1,000 VDC | > 100 MΩ @ 500 VDC | > 10 MΩ @ 500 VDC |
| Ambient Temperature Range | -40°C to +125°C | -40°C to +85°C | -25°C to +60°C |
| Short-Circuit Withstand | 4,000A (10ms overload trip) | 2,000A overload capacity | Low peak DC current limit |
| Primary Sourcing Focus | EV Battery Disconnect, Megawatt Fast Charging | Solar Inverters, Industrial UPS, Telecom DC | HVAC Compressors, Fixed AC Motors |
Understanding structural market shifts toward 800V/1200V architecture, bi-directional V2G charging, and supply chain resiliency.
As automakers accelerate the transition from traditional 400V battery architectures to 800V and 1200V platform designs (enabling 10-minute 10-to-80% charge cycles), procurement teams must source contactors with expanded dielectric isolation gaps and higher creepage resistance. Future contactors demand advanced alumina ceramic headers capable of switching megawatt-level currents without dielectric breakdown.
Vehicle-to-Grid (V2G) and Vehicle-to-Home (V2H) technologies require contactors capable of handling continuous bidirectional current vectors. Traditional polar magnet blowouts are being rapidly replaced by non-polar symmetric magnetic blowout arrays, ensuring identical arc quenching efficiency regardless of whether energy flows into the battery pack or back into the utility grid.
Global REACH and RoHS regulations are tightening rules surrounding fluorinated chemicals and hazardous potting compounds. Leading EV contactor exporters are pioneering PFAS-free epoxy formulations and high-density laser-welded stainless steel enclosure shells that reduce environmental impact while maintaining zero helium leak rate specs ($< 1 \times 10^{-9} \text{ atm}\cdot\text{cm}^3/\text{s}$).
Altran Magnetics designs, builds, and delivers high-performance electromechanical power components from our facility at 1741 Industrial Drive, Sterling, Illinois. Our global engineering team works directly with OEM product designers, system integrators, and procurement directors to tailor contactor characteristics to your precise load profiles.
From initial schematic design and transient high-current simulation to 100% automated end-of-line functional testing, we ensure that every custom part number meets rigorous regulatory criteria before mass production.
Explore our broader ecosystem of specialized power switching, EMI mitigation, and automated controls.
Sealed, gas-filled DC contactors engineered for EV fast charging, battery storage, and high-voltage DC auxiliary power systems.
Get a Quote
Low-leakage noise suppression filters tuned to pass CISPR, FCC Part 15, and IEC 61000 EMC limits on the first pass.
Get a Quote
Panel-mount, DIN-rail, and PCB solid state relays featuring zero-cross optical isolation for millions of wear-free cycles.
Get a QuoteClear, definitive engineering answers addressing product selection, custom specifications, compliance, and international delivery.
Connect directly with our senior application engineers in Sterling, Illinois. Receive technical datasheets, 3D STEP models, and fast-track sample prototyping for your next production build.
