Three-Axis Floating · Four-Contact Anti-Vibration · 30A High Current | B3501 Series

As one of the early players in the automotive electronics industry, BJD is committed to providing reliable solutions. Our connector solutions serve automotive electronics, industrial control, LED commercial displays, medical, security, and many other fields. BJD is a provincial "Specialized, Refined, Distinctive and Innovative" enterprise and a National High-Tech Enterprise with a CNAS-accredited laboratory, ensuring product quality!

01 Development Background

Industry Driver: The Wave of Vehicle Electrification and Intelligence

As new energy vehicles spread rapidly, vehicle electrical architectures are evolving from traditional distributed layouts toward centralized domain-controller designs. Cockpit, ADAS, and powertrain domains all require extensive board-to-board interconnections inside their controllers, imposing requirements on connector performance, reliability, and installation adaptability that far exceed those of traditional automotive electronics.

Conventional board-to-board connectors cannot meet market demands in current-carrying capacity and withstand voltage. Even imported automotive-grade connectors that meet performance targets generally offer only X/Y two-axis floating and dual-contact structures, providing limited contact reliability in high-vibration scenarios.

In vehicle assembly, the relative position of two PCBs is difficult to align precisely, and thermal expansion plus accumulated vibration further aggravate the deviation. Conventional connectors lack Z-axis floating compensation, which can easily cause forced mating, stressed pins, and cracked solder joints — all reliability hazards.

The B3501 Series is BJD's answer to the niche of high-reliability board-to-board interconnection for new-energy and smart-vehicle cockpit systems; its X/Y/Z three-axis ±1mm floating design directly targets the pain points of harsh environments.

02 Key Specifications

The product uses high-conductivity copper-alloy terminals and a PA9T engineering-plastic housing, ensuring excellent electrical performance for a wide range of high-end applications.

Note: Plug P/N 123095-60XX50-HF; Receptacle P/N 123096-60XX50-HF.

03 Six Key Advantages

The B3501 Series features a unique staggered four-contact structure with X/Y/Z three-axis ±1mm omnidirectional floating capability, meeting the stringent requirements of automotive cockpit systems for high current, high voltage, wide temperature range, and vibration resistance.

• Three-axis omnidirectional floating
  ±1mm floating compensation in each of the X/Y/Z directions effectively absorbs PCB mounting deviation and increases assembly tolerance.
• Strong current-carrying capacity
  Rated at 30A with high-conductivity copper alloy, supporting high-power applications.
• Ultra-low contact resistance
  Only 3mΩ contact resistance; the staggered four-contact structure ensures reliable contact while reducing heat and loss.
• Excellent vibration resistance
  The unique staggered four-contact design maintains a stable electrical connection under automotive vibration.
• Wide-temperature operation
  Reliable operation across the full -40°C to +125°C range, meeting stringent automotive-grade environmental requirements.
• Automotive cockpit-grade certification
  PA9T engineering-plastic housing, resistant to high temperature and corrosion, compliant with automotive cockpit system application standards.

04 Application Scenarios

With its high current capacity, high withstand voltage, three-axis floating, and wide temperature range, the B3501 Series is widely used in the following scenarios:

• On-board charging (OBC)
  220V AC to high-voltage DC conversion; interconnection between the main board and PFC / DC-DC sub-boards.
  Key features: 30A high current · High withstand voltage
• Vehicle connectivity (T-BOX / gateway modules)
  Board-to-board interconnection inside compact communication boxes, where large mounting deviation makes floating compensation critical.
  Key features: ±1mm floating · Compact pitch
• Industrial control (industrial servo / inverters)
  Interconnection of servo-drive and inverter control boards; reliable transmission over a wide temperature range.
  Key features: Wide temperature ±85°C · Long life
• Smart cockpit (cockpit domain controller, CDC)
  Interconnection among functional boards of the domain controller behind central displays, instrument clusters, and HUDs.
  Key features: High-speed signal · Vibration-proof stability
• Autonomous driving (ADAS domain controller)
  High-reliability interconnection between camera/radar data-processing boards and decision main boards.
  Key features: Staggered four contacts · Three-axis floating
• Battery management (BMS)
  Precise interconnection of sampling, balancing, and protection boards in high-voltage battery packs.
  Key features: 1000V withstand voltage · 3mΩ low resistance

05 Detailed Drawings

Plug Assembly (123095-60XX50-HF)

Receptacle Assembly (123096-60XX50-HF)

06 Summary

The B3501 Series solves three core pain points in automotive electronics:

• Three-axis ±1mm floating eliminates mounting-deviation issues;
• Staggered four contacts plus 3mΩ ultra-low resistance greatly reduce contact failure under vibration;
• Its high-performance standard covers the most stringent automotive-grade requirements.

[Contact Us]
Tel: +86-755-8395 8345
Email: support@beijida.com
Website: https://beijida.com/
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