Engineered for absolute accuracy, maximum electrical conductivity, and extreme thermal resilience.
Established in 2010 in the highly active industrial hub of Qingbaijiang District, Chengdu, China, Chengdu Suchen Environmental Protection Materials Co., Ltd. has grown into a diversified industrial group over the course of 14 years. Our group operates across three highly specialized, inter-dependent business segments: plasma cutting and welding consumables, high-precision laser cutting consumables, and high-voltage DC relays (HVDC contactors). We configure our processes specifically to address the demanding reliability expectations of international engineering partners, energy project contractors, and advanced EV busbar manufacturers.
By leveraging our deep technological background in high-temperature metallurgy and materials chemistry (developed through our cutting nozzle and shield cap manufacturing), Suchen has pioneered state-of-the-art contact surface treatment technologies for High-Voltage Direct Current applications. Our primary business is targeted directly toward fast-growing overseas markets, serving Fortune 500 equipment producers and utility developers in North America, Western Europe, and Southeast Asia.
As high-voltage grids migrate toward decentralization and transportation switches to direct-current propulsion, HVDC contactors act as the ultimate failsafe switch.
Industrial battery energy storage networks operate at voltages up to 1500VDC to limit transmission losses. Our HVDC contactors isolate high-energy battery racks instantly during thermal runaway alerts, protecting multi-megawatt systems from catastrophic fire propagation.
Next-generation commercial EV chargers rely on bidirectional power transfer and high currents (up to 600A at 1000V) to achieve rapid charge times. Suchen relays prevent arc-damage during immediate plug-disconnect events, guaranteeing operator safety and equipment longevity.
Electric buses, construction machinery, and commuter rail systems undergo continuous mechanical vibrations and wild ambient temperature swings. Hermetically sealed relays prevent oxidation on contacts, assuring continuous, low-resistance connections in active operations.
Unlike AC currents which naturally cross a "zero voltage point" twice per cycle (making arc self-extinguishment relatively simple), DC currents remain constant. When contacts separate under heavy load, an intense electrical arc forms. If this arc is not quenched immediately, it will vaporize the contacts and cause permanent welding failures.
To overcome this barrier, Suchen's technical roadmap concentrates on three core architectural developments:
Evaluate our signature high-voltage components optimized for renewable microgrids, heavy machinery, and charging stations.
| Model Series | Nominal Voltage (VDC) | Continuous Current (A) | Contact Arrangement | Seal Technology | Primary Industrial Application |
|---|---|---|---|---|---|
| NVR6V-50Y | 750 VDC | 50 A | SPST-NO (1 Form A) | Epoxy Sealed / N2 Filled | EV Pre-charge, Aux Systems |
| NVR6V-150A | 1000 VDC | 150 A | SPST-NO (1 Form A) | Ceramic Hermetic / H2 Rich | Commercial EV Charging, ESS |
| NVR8V-300A | 1000 VDC | 300 A | SPST-NO + Aux Contact | Ceramic Hermetic / Gas Filled | Solar Combiners, EV Powertrain |
| NVR9V-500A | 1500 VDC | 500 A | SPST-NO (Bipolar Blowout) | Ceramic Hermetic / Gas Filled | Utility Scale Battery Racks, Wind |
Pillars of Suchen's operations driving innovation, reliability, and long-term customer partnerships.
We strive to establish Suchen as a primary international hub for clean tech materials and industrial safety devices. By optimizing current paths and minimizing thermal energy dissipation, our high-voltage contactors directly enhance the round-trip efficiency of global power systems.
We understand that system integrity is vital in high-voltage engineering. Our business culture centers around exhaustive testing, supply-chain accountability, and raw material validation, building reliable commercial partnerships.
Customer satisfaction guides our development process. From initial engineering drawings and mockups to global logistics, Suchen provides complete consulting support to reduce time-to-market for clean energy designs.
Navigating varying regional standards (e.g., North American UL standards vs. European CE directives) presents challenges for developers. Suchen supports global operations by offering full certification dossiers, including materials trace-back lists and electrical insulation profiles.
All Suchen products are produced under certified management environments, meeting international safety metrics. Our custom design services (OEM/ODM options) are configured for integration into standard DIN rails, custom PCB configurations, or insulated switch boxes.
Accredited Testing & Verification Standards
Expert analysis to assist procurement teams and engineers in identifying system bottlenecks and choosing relays.
Unidirectional contactors rely on permanent magnet blowouts placed to push the arc away from the contact surfaces when current flows in one direction. Bidirectional contactors utilize neutral, balanced magnetic geometry to steer arcs safely into splitter plates, regardless of the charging or discharging direction. This bidirectional capability is crucial in modern EV charging and energy storage systems (BESS).
Hydrogen (H2) has exceptional thermal conductivity, allowing it to absorb heat from the electrical arc rapidly. By sealing contacts inside a pressurized H2-rich environment, the arc is cooled and extinguished up to ten times faster than in air, preventing high-voltage breakdown and reducing contact degradation.
Drawing from our 14 years of metallurgy experience in laser and plasma cutting consumables, Suchen applies advanced silver-tin-oxide (AgSnO2) contacts. This formula reduces material migration and welding risks. We check gas seal integrity on 100% of our hermetic relays to guarantee the interior gas mixture remains active for the component's service life.
Engineers must verify: 1. Continuous current carrying capacity (Ith) without overheating. 2. Maximum breaking current (to clear short-circuits under load). 3. Dielectric withstand voltage across open contacts. 4. Auxiliary contact feedback for system safety monitoring.
High-power cutting processes subject copper and alloy components to extreme thermal stress. Suchen utilizes our experience with thermal dissipation, alloy composition, and CNC precision machining from our cutting division to design relay contacts that run cooler and maintain structural stability over time.
Additional custom solutions designed to operate under intensive thermal profiles.
SUCHEN
