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The First Truly Floating SMB Connector, Purpose-Built for Automotive Camera Modules
Industry & Technology|
2026-10-23 11:11:47
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 Solving the Connection Challenge in Automotive Camera Modules
Development Background of the Floating SMB Connector
As ADAS (Advanced Driver Assistance Systems) and autonomous driving technologies gain momentum, the number of cameras per vehicle has climbed from 1–2 in early models to 8–12 in today's high-end vehicles — a 5–10x increase that directly drives geometric growth in demand for automotive connectors.
| Vehicle Stage | Typical Camera Count | Main Functions | Resolution Requirement |
|---|---|---|---|
| Traditional ICE vehicle (L0) | 1–2 cameras | Rear-view imaging | 480P |
| Connected smart vehicle (L1/L2) | 4–6 cameras | Dashcam + surround-view parking | 720P–1080P |
| Advanced ADAS vehicle (L2+/L3) | 8–12 cameras | Front sensing + side view + in-cabin monitoring | 1080P and above |
| Highly automated driving (L4/L5) | 12+ cameras | 360° omnidirectional sensing + redundant vision | Trending to 4K |
At the same time, camera resolution has jumped from 480P to 1080P and even 4K, with image data volume growing more than 10x. This places unprecedented demands on connector bandwidth and signal integrity — any shortfall in transmission quality can, at best, distort images and lower frame rates, and at worst, cause signal loss, directly affecting ADAS perception accuracy and driving safety.
Traditional connection solutions, however, are stretched thin against these demands. The multi-level accumulation of assembly tolerances across the PCB and camera front/rear covers, transient contact interruptions caused by vehicle vibration, and the tight internal space of camera modules that demands precise mating together form the three major bottlenecks constraining product reliability and production-line yield. High frequency, miniaturization, and high reliability are becoming the industry's rigid requirements for next-generation automotive connectors.
02 Automotive Camera Overview
Modern smart vehicles rely ever more deeply on camera systems. By function, automotive cameras fall into two categories:
- Imaging cameras (passive safety): capture and store or present video to the driver, such as dashcams and reversing cameras.
- Sensing cameras (active detection): primarily serve ADAS, enabling collision warning, lane-departure warning, pedestrian recognition, and more.
By mounting position, cameras are further divided into front-view, rear-view, side-view, surround-view, and in-cabin cameras, covering the vehicle's full-surround sensing needs.
| Mounting Position | Camera Type | Main Functions | Description | Resolution |
|---|---|---|---|---|
| Front-view | Mono/stereo | Collision warning, lane departure, traffic sign recognition | Mounted at the windshield, ~45° field of view; stereo offers better ranging | 1080P+ |
| Front-view | Wide-angle/standard | Dashcam | Real-time recording of road conditions ahead | 720P+ |
| Front-view | Night vision | Enhanced nighttime driving safety | Infrared thermal imaging converted to visible images | 480P |
| Surround-view | Wide-angle | Panoramic parking | Four-channel stitching with road-perception algorithms | 480P+ |
| Rear-view | Wide-angle | Reversing image, streaming rear-view mirror | Mounted at the rear, assisting parking | 480P+ |
| Side-view | Standard view | Blind-spot monitoring, lane-change assist | Mounted below the side mirrors | 720P+ |
| In-cabin | Wide-angle/standard | Fatigue detection, emotion recognition, gesture recognition | Mounted at the interior rear-view mirror to monitor driver status | 720P+ |
03 Floating SMB Connector Specifications
A built-in N-shaped spring contact structure provides ±0.5mm floating compensation in the X and Y directions, actively absorbing assembly deviations across the PCB and camera front/rear covers — fundamentally preventing terminal deformation or housing damage and ensuring a reliable connection.
| Item | Specification |
|---|---|
| Rated voltage | 60V DC MAX |
| Rated current | 1A MAX |
| Operating temperature | -40°C to +105°C |
| Characteristic impedance | 50Ω ±10% |
| Insulation resistance | ≥100 MΩ |
| Contact resistance | Center conductor ≤40 mΩ / Outer conductor ≤20 mΩ |
| Mating force | ≤75N (single port) |
| Mating durability | 25 cycles |
| Storage conditions | 20±8°C, 20%–65% RH, 1 year |
04 Conventional Solution vs. BJD SMB Solution
The following comparison is based on real test-video scenarios simulating board-to-board mating with a ±0.5mm lateral offset:
| Dimension | Conventional Connector | BJD SMB Floating Connector |
|---|---|---|
| Insertion with 0.5mm offset | Terminals tilt and are forced in | Terminals self-adapt through horizontal floating for smooth insertion |
| Housing condition | Housing punctured, structural damage | Housing intact, no deformation |
| Terminal condition | Terminals deformed, high contact-failure risk | Terminals properly aligned, reliable contact |
| Blind-mating support | Not supported; precise alignment required | Supported; no precise alignment needed |
| Impact on production yield | Deviation increases scrap rate | Tolerance-friendly design significantly reduces rework |
| Reliance on assembly fixtures | High; precision fixtures required | Low; floating structure self-compensates |
- Conventional connectors suffer irreversible structural damage in offset-assembly scenarios;
- The BJD SMB floating connector absorbs deviation through its spring floating mechanism, fundamentally eliminating the risk of misaligned-insertion failure.
05 Overall Structure of the BJD SMB Floating Connector
06 Six Key Advantages
The BJD SMB floating connector absorbs deviation through its terminal spring floating mechanism, fundamentally eliminating misaligned-insertion failure; it enables floating-compensated board-to-board interconnection that accommodates assembly deviation and safeguards signal integrity.
- Floating compensation (core differentiation)
The N-shaped spring structure absorbs ±0.3–±0.5mm assembly deviation in X/Y, keeping terminals horizontally aligned and eliminating housing damage and terminal deformation risks. - High-frequency transmission (industry-standard compatible)
Operating frequency DC–6GHz with 50Ω characteristic impedance matching and low insertion loss, fully supporting 1080P+ high-definition camera signal transmission. - Blind-mating support (efficiency boost)
Supports board-to-board blind mating without precise alignment, completely eliminating reliance on precision fixtures for simple, efficient assembly. - Compact size (miniaturization-ready)
A small form factor designed for space-constrained, high-density PCB layouts such as camera modules. - Automotive-grade reliability (automotive certified)
Mating life ≥500 cycles, resistant to vibration, wide temperature range, and humidity, delivering stable full-lifecycle operation under stringent automotive conditions. - Integrated waterproofing (system-level protection)
A one-piece housing paired with waterproof FAKRA cable assemblies reduces joint points, forming a complete waterproof chain from board end to cable end, supporting IP67/IP69K.
07 Application Scenarios
For any scenario that combines compact space, assembly deviation, high signal frequency (DC–6GHz), and stringent reliability requirements, the BJD SMB floating connector is the preferred solution:
- Automotive (core market)
Automotive camera modules (front/rear/surround/side view); ADAS sensing-system board-level interconnection; NEV BMS modules; automotive radar RF connections; 4G/5G antenna modules. - Industrial automation (high-reliability scenarios)
Industrial robot control boards; PLC module board connections; machine-vision high-speed data transmission; servo-drive board-to-board interconnection; signal stability in vibrating environments. - Servers & data centers (high-density interconnection)
Server backplane board-to-board connections; storage-array controller boards; network-switch line cards; high-density rack signal interconnection. - Consumer electronics (miniaturized scenarios)
Smartphone camera modules; high-density tablet PCB interconnection; drone image-transmission and flight-controller boards; TWS earbud RF connections. - Medical & test equipment (high-precision scenarios)
Ultrasound/endoscopy imaging modules; portable test instruments; laboratory automation equipment; wearable medical devices.
08 Summary
The BJD SMB floating connector absorbs ±0.5mm assembly deviation in the X/Y directions and combines DC–6GHz high-frequency transmission with an integrated waterproof design — fundamentally eliminating insertion loss, signal distortion, and production-yield loss in automotive camera modules and all kinds of precision board-to-board interconnection scenarios, and confidently addressing the five major challenges of tight space, large deviation, high frequency, harsh environment, and cost.
[Contact Us]
Tel: +86-755-8395 8345
Email: support@beijida.com
Website: https://beijida.com/
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