Automotive Solutions

Hongfa automotive relays undergo comprehensive AEC-Q200 qualification testing: Temperature Cycling - 1000 cycles from -40°C to +125°C to verify thermal reliability and material compatibility

Vibration Resistance - 10G swept sine vibration from 10-2000Hz in X, Y, Z axes simulating vehicle road conditions

Mechanical Shock - 50G half-sine shock pulses representing pothole impacts and collision events

Humidity Resistance - 85°C/85%RH for 1000 hours to verify moisture protection and corrosion resistance

High Temperature Operating Life - 1000 hours at maximum rated temperature under electrical load

Electrostatic Discharge - ESD testing to verify protection against static discharge

Solderability - wetting balance testing for reliable PCB assembly. All tests are performed per AEC-Q200 Rev E standards. Test reports and qualification documents are available upon request. Hongfa automotive relays also meet OEM-specific requirements from VW, GM, Ford, and other major manufacturers.

Hongfa automotive relays are fully AEC-Q200 qualified; contact our FAE for qualification test reports.

For Body Control Module (BCM) applications, relay selection involves several considerations: 1) Current Requirements - BCM relays typically switch 5A to 20A loads

select relay rating based on worst-case load current, 2) Coil Voltage - 12VDC standard for passenger vehicles, 24VDC for commercial vehicles, 3) Mounting - PCB mount relays (HFV4, HFV21) for integrated BCM designs, 4) Contact Configuration - SPST for simple switching, SPDT for changeover functions, 5) Temperature Range - verify operation at -40°C (cold start) and +85°C (interior ambient), 6) Vibration Resistance - must withstand vehicle vibration without contact chatter, 7) Size Constraints - compact relays enable smaller BCM packages. I recommend HFV4-012-1ZST for general BCM switching (20A rating), HFV21-012-1HST for compact designs. Both are AEC-Q200 qualified with proven reliability in millions of vehicles. Include flyback diodes for inductive loads.

Use HFV4 or HFV21 PCB mount relays for BCM applications; verify AEC-Q200 qualification.

Hongfa provides comprehensive relay solutions for automotive HVAC systems: Blower Motor Control - HFV6 (35A) or HFV7 (50A) relays handle blower motor loads with high inrush capability

Compressor Clutch Control - HFV6 relays switch A/C compressor clutches (typically 15-25A inrush)

Heater Control - HFV4 or HFV6 for PTC heater switching

Mode Door Actuators - HFV4 for actuator motor control

Rear Defrost - HFV6 or HFV7 for high-current defrost grids. All HVAC relays are AEC-Q200 qualified with extended temperature range (-40°C to +125°C) for under-hood and interior mounting. The relays feature enhanced vibration resistance for vehicle environments. For electric vehicle HVAC, consider HVDC relays (HFE series) for high voltage heater control. BeiLuo Electronics provides application support and can recommend specific part numbers based on your HVAC system requirements.

Use HFV6 for compressor and blower, HFV7 for high current, HFV4 for actuators; all AEC-Q200 qualified.

Hongfa automotive relays include AEC-Q200 qualification markings. Certificate copies and test reports are available from BeiLuo Electronics. PPAP documentation is available for automotive OEMs upon request.

Request qualification documents from our sales team for your records.