HONGFA

Hongfa high-voltage DC relays (DC contactors) adopt a ceramic brazed hermetic structure with hydrogen as the protective gas, using magnetic blow-out arc extinction to achieve safe high-voltage breaking, mainly for switching DC power sources. Since development began in 2006, they have partnered with leading global OEMs and battery makers, serving New Energy Vehicles, charging piles, 48V start-stop systems, photovoltaics, energy storage and industrial power supplies.

Rated voltage: 1000 V DC; Rated current: 1200 A/400 A; Coil voltage: 12/24 V DC; Contact resistance: <0.5 mΩ; Insulation resistance: >1000 MΩ; Mechanical life: 1M cycles; Electrical life: 100k cycles; Protection rating: IP67; Operating temperature: -40~+85 ℃; Material: Ceramic brazed seal

• Main circuit and battery pack high-voltage isolation in NEVs
• DC and AC charging piles
• 48V mild-hybrid start-stop systems
• Photovoltaic generation and energy storage systems

Hongfa automotive relays are designed for vehicle applications and classified by lead form and function into PCB-type, plug-in, combined and high-current relays, widely used in body, safety, powertrain, power management, chassis and driver information systems. Having acquired Hella's global relay business in 2019, Hongfa is a drafter of the QC/T695 "Automotive Relays" industry standard.

Model: HF3635 / HFK10-T / HFK11-T / HFK8-T / HFK9-T / HFKA-T / HFKAH-T / HFKF-T / HFKJ-T / HFV15 / HFV16 / HFV16-L / HFV6-G / HFV9 / HFK12-T / HFK15 / HFK16; Rated current: 20–70 A; Coil voltage: 12 V / 24 V; Contact resistance: ≤50 mΩ; Insulation resistance: ≥100 MΩ; Mechanical life: ≥1×10⁶; Electrical life: ≥1×10⁵; Operating temperature: -40–+85 ℃

• Body control systems (lighting/wipers/door locks)
• Safety and anti-theft systems
• Powertrain and power management systems
• Chassis and driver information systems

Hongfa's high-capacity control box is the safety control and protection hub of the NEV high-voltage circuit, offered both as a power distribution unit and as a battery disconnect unit: the former stresses integration and lightweight packaging, the latter a compact layout with finger-safe protection and flame retardancy. An internal circuit board continuously monitors relay condition and branch electrical values and reports them to the vehicle CAN network, so that the vehicle can raise early fault warnings and run diagnostics.

PDU protection rating: IP67; BDU protection rating: IPXXB; rated voltage: 750 V DC; rated branch current: 200 A; peak current: 600 A / 30 s; monitored parameters: closing cycles, welding alarm, branch current, load-end temperature; communication interface: CAN 2.0B; operating temperature: -40 °C to +85 °C

• NEV high-voltage power distribution (PDU)
• Battery pack high-voltage isolation (BDU)
• Vehicle high-voltage circuit electrical safety protection
• High-voltage circuit data acquisition and CAN bus communication

For NEV charging scenarios Hongfa delivers a system-level offer that runs from core components up to the complete charging pile, covering both DC and AC charging. Key parts such as high-voltage DC relays, fuses and film capacitors form a safe and dependable power loop, while power connectors and signal-type relays handle control and sensing, supporting the large-scale deployment of centralized charging stations and very high power ultra-fast charging.

Charging mode: DC / AC; relay current rating: ceramic-brazed 1200 A, epoxy 400 A; ambient temperature for continuous current: 85 °C; auxiliary contacts: supported; companion devices: fuses, film capacitors, power connectors, reed/signal relays; system power class: megawatt class; rated voltage: 1000 V DC; protection rating: IP54

• DC charging piles
• AC charging piles
• Centralized charging stations
• Megawatt-class ultra-fast charging

Hongfa offers Body Control Modules (BCM) that manage vehicle wipers, door locks, washers, mirrors and interior/exterior lighting, with start-stop control capability. Communicating over CAN, LIN, low-frequency and RF signals, the BCM is listed among the core in-vehicle electronics for fuel/weak-hybrid and New Energy Vehicles in Hongfa's automotive solutions.

Supply voltage: 12 V / 24 V DC; communication interfaces: CAN, LIN, low frequency, RF; driver output channels: ≥20; max load current per channel: 20 A; quiescent current: ≤100 µA; operating temperature: -40 °C to +85 °C; protection rating: IP54; standard compliance: ISO 16750

• Body control (lighting/wipers/door locks)
• Keyless entry and start (PEPS)
• In-vehicle signal control system
• Anti-theft and tire pressure monitoring

Hongfa offers in-vehicle Gateway products listed under New Energy Vehicles and in-vehicle signal control within its automotive solutions. Used for data routing and protocol conversion among the vehicle's multiple networks such as CAN, LIN and automotive Ethernet, the gateway supports the vehicle's overall E/E architecture communication.

Supported networks: CAN, LIN, automotive Ethernet; CAN channels: ≥6; Ethernet rate: 100BASE-T1 / 1000BASE-T1; routing latency: ≤1 ms; supply voltage: 12 V DC; quiescent current: ≤200 µA; operating temperature: -40 °C to +85 °C; security: SecOC and hardware encryption

• In-vehicle multi-network data routing
• Protocol conversion
• Vehicle E/E architecture communication
• NEV in-vehicle signal system

Hongfa provides Oxygen Sensor products for detecting oxygen concentration in automotive exhaust, enabling closed-loop air-fuel ratio control and three-way catalytic purification. Its subsidiary Hongfa Electric Appliance specializes in oxygen sensor R&D and manufacturing; its IECQ certification scope includes "Oxygen Sensor Element," confirming the series as part of Hongfa's official in-vehicle electronics line.

Measured variable: exhaust oxygen concentration (λ); output signal: 0.1 V to 0.9 V; heater supply voltage: 12 V; heater power: ≤18 W; light-off time: ≤20 s; exhaust-side operating temperature: up to 900 °C; connector protection rating: IP67; applicable air-fuel ratio range: λ 0.7 to 1.3

• Automotive exhaust oxygen concentration detection
• Closed-loop air-fuel ratio control
• Three-way catalytic converter efficiency monitoring
• Fuel/weak-hybrid and New Energy Vehicles