Hongfa High Voltage DC Relays

Hongfa HVDC relays employ multiple arc suppression technologies for safe DC switching up to 1000V: Magnetic Blowout - permanent magnets create a magnetic field that stretches and extinguishes the arc quickly

Contact Gap Design - large contact gaps (≥2.4mm) provide adequate distance to prevent arc restriking

Contact Materials - specialized silver alloys with high melting points and low erosion rates

Hermetic Sealing - ceramic-to-metal seals contain arcs and prevent external ignition

Gas Filling - some models use inert gas to suppress arc formation

Dual Contact Design - make-before-break or break-before-make configurations for specific applications. The arc suppression is critical because DC arcs are more difficult to extinguish than AC arcs due to the absence of zero-crossings. For series-connected applications, voltage sharing circuits ensure equal voltage distribution across multiple relays. All HVDC relays undergo 100% testing for dielectric strength and contact resistance. The arc suppression design allows these relays to safely switch high voltage DC loads in EV battery management systems.

Hongfa HVDC relays with magnetic blowout are suitable for EV battery management; contact our FAE for series connection guidance.

The HFE82, HFE85, and HFE88 series are high voltage DC relays with different voltage and current ratings: HFE82 supports 450VDC at 100A, suitable for lower voltage EV and energy storage applications

HFE85 handles 750VDC at 150A, ideal for standard EV battery systems

HFE88 switches 1000VDC at 250A, designed for high voltage fast charging and heavy-duty applications. Key differences: Voltage Rating - HFE82: 450VDC, HFE85: 750VDC, HFE88: 1000VDC

Current Rating - HFE82: 100A, HFE85: 150A, HFE88: 250A

Contact Gap - increases with voltage rating (2.4mm to 3.6mm)

Coil Voltage - all support 12VDC and 24VDC

Mounting - all use busbar connections for high current

Safety Certifications - all are UL, TÜV, and CQC certified. For 400V EV platforms, HFE82 is cost-effective. For 800V EV platforms, HFE85 provides the right balance. For ultra-fast charging and grid storage, HFE88 offers maximum capacity.

Choose HFE82 for 450V/100A, HFE85 for 750V/150A, HFE88 for 1000V/250A applications.

Hongfa HVDC relays are UL, TÜV, and CQC certified for electric vehicle applications. These certifications verify the relays meet stringent safety requirements for high voltage DC switching in EV battery management systems.

Verify required certifications for your target markets.

Hongfa HVDC relay contact life depends on switching conditions. Under rated load, electrical life is typically 1,000-10,000 cycles. Mechanical life is 100,000+ cycles. Precharge circuits and proper protection extend contact life significantly.

Size relays appropriately and use precharge circuits to maximize contact life.

Yes, Hongfa HVDC relays can be series-connected for voltages exceeding single-relay ratings. Voltage balancing circuits ensure equal voltage distribution. Contact our FAE for series connection design guidance.

Contact FAE for series connection design and voltage balancing circuits.