Connectors
Industrial Electronic Connectors & Board-Level Interconnect Solutions
Product Overview Industrial electronic connectors serve as electromechanical interface components that establish secure signal, data, and power transmission pathways between printed circuit boards (PCBs), subsystems, and external peripheral devices. Operating within industrial automation, telecommunications, automotive electronics, and consumer hardware architectures, these interface components rely on precise pin pitch tolerances, metal alloy contact spring properties, and thermoplastic housing dielectrics to maintain low electrical contact resistance, high mating cycle durability, and dielectric withstanding voltage under thermal and mechanical stress. Shenzhen Circle Interconnect manufactures standardized and application-specific interconnect solutions, utilizing high-conductivity copper alloy bases (such as phosphor bronze and brass) coupled with electroplated contact finishes (selective gold or tin over nickel underplating) to fulfill stringent conductivity and corrosion-resistance metrics.
Product Range
USB Connectors
USB Type-A, Type-B, Micro-USB, and high-density USB Type-C receptacles and plugs supporting USB 2.0 (480Mbps), USB 3.0 (5Gbps), and USB 4.0 specifications with integrated power delivery capabilities.
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RJ45 Ethernet Connectors
Modular jacks and plugs ranging from Cat5e, Cat6, Cat6A, to Cat7 and Cat8 variants, featuring internal shielding options (U/FTP and S/FTP) to suppress electromagnetic interference (EMI) in high-speed network cabling.
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Pin Headers & Female Headers
Board-level stacking connectors available in standard pitches including 1.27mm, 2.0mm, and 2.54mm configurations, engineered for parallel or perpendicular PCB mating geometries.
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D-SUB & Interface Connectors
Standard and high-density D-SUB receptacles, SCSI connectors, DIN 41612 European sockets, and SATA/FPC/FFC flexible flat cable connectors for legacy and high-density data bus architectures.
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Specialized Interconnects
IP67/IP68 waterproof connectors, Pogo pins, power connectors, automotive-grade sealed headers, box headers, and ejector headers built for harsh operating environments.
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Low Contact Resistance: Optimized spring contact geometry maintains stable milliohm-level resistance across extended mating cycles, preventing signal attenuation and voltage drop.
High-Density Form Factors: Miniature pitch spacing (down to 1.27mm and below) maximizes board real estate utilization in space-constrained electronic modules.
Robust Shielding Effectiveness: Metal shielding cans and integrated grounding tabs on RJ45 and high-speed USB variants suppress EMI/RFI emission and susceptibility.
Thermal-Resistant Insulators: High-temperature engineering thermoplastics (such as LCP, PBT, and PA9T) withstand automated infrared (IR) reflow soldering profiles up to 260°C without warpage.
Mechanical Retention & Polarization: Keyed housing polarization prevents reverse insertion, while robust solder tabs and mounting pegs mechanically anchor connectors to the PCB substrate.
Technical Specifications
|
Parameter |
Specification |
|
Pitch Options |
0.5 mm (FPC), 1.27 mm, 2.0 mm, 2.54 mm, plus customized metric or imperial pitches |
|
Contact Material |
Phosphor Bronze or Beryllium Copper, selected for high spring performance and fatigue resistance |
|
Contact Plating |
Gold flash to 30 μin selective gold plating on mating areas; 50–100 μin nickel underplating; matte tin or gold flash on solder tails |
|
Housing Insulator Materials |
PA6T, PA9T, LCP (Liquid Crystal Polymer), and PBT, with UL94 V-0 flammability rating options |
|
Current Rating |
1.0 A to 5.0 A per contact, depending on connector design and application |
|
Voltage Rating |
30V AC/DC to 250V AC |
|
Insulation Resistance |
≥ 1000 MΩ at 500V DC |
|
Dielectric Withstanding Voltage |
500V AC or 1000V AC RMS for 1 minute |
|
Contact Resistance |
≤ 20 mΩ initial |
|
Operating Temperature |
-40°C to +105°C, with selected designs available up to +125°C |
|
Mechanical Durability |
500 to 10,000 mating cycles, depending on connector series and design |
|
Customization |
Custom pitch, contact configuration, plating, housing material, mounting style, and termination options available |
Industrial Automation
Programmable Logic Controllers (PLCs), factory sensors, human-machine interfaces (HMIs), and industrial Ethernet switches.
Telecommunications & Networking
Routers, switches, enterprise server racks, and data center transmission equipment.
Automotive Electronics
Infotainment systems, dashboard instrument clusters, ADAS control units, and internal wiring harnesses.
Consumer & Commercial Electronics
Laptops, docking stations, power supplies, handheld diagnostic tools, and peripheral hardware.
Medical Equipment
Patient monitoring systems, portable diagnostic hardware, and laboratory analytical instruments.
Manufacturing & Quality Control
High-Speed Stamping & Injection Molding: In-house precision progressive die stamping produces metal contact pins with tight dimensional tolerances (+/-0.01mm), while automated multi-cavity injection molding machines form high-temperature thermoplastic housings.
Automated Assembly Lines: Automated insertion and inspection cells assemble contact pins into housings, ensuring consistent co-planarity and pin retention force.
Electroplating Verification: Automated plating lines apply precise gold and tin layers, verified via X-ray fluorescence (XRF) coating thickness analyzers to ensure compliance with porosity and thickness specifications.
Rigorous Testing Protocols:
Contact resistance measurement using micro-ohmmeters.
High-potential (Hi-Pot) dielectric breakdown testing.
Insertion and withdrawal force testing via mechanical dynamometers.
Salt spray corrosion testing (ASTM B117) to verify plating integrity.
Thermal aging and temperature cycling tests.
Production Lines And Inspection Equipments
Custom OEM/ODM Solutions
Custom Pin Configurations & Tail Lengths: Modification of standard pin header heights, right-angle bend radii, and PCB tail lengths to fit bespoke enclosure dimensions.
Specialized Materials & Plating: Custom thickness gold plating (up to 50u") for high-wear military or marine applications, or high-temperature plastics for specialized automotive under-hood environments.
Proprietary Housing Tooling: Complete mold flow analysis, rapid prototyping, and custom injection mold fabrication for proprietary connector interfaces.
Integrated Wire Harness Assembly: Overmolding and cable soldering services combining bare connectors with custom data and power cables.
Why Choose Our Products
Direct factory manufacturing from Shenzhen production facilities eliminating tier-1 distributor markups while maintaining strict process control.
Complete traceability from raw copper alloy coils and engineering plastics to finished, tape-and-reel or tray-packaged connector components.
Full compliance documentation including ISO 9001 quality management standards, RoHS, REACH, and UL certification data available upon request.
Engineering collaboration on custom drawing review, 3D STEP model provision, and sample turnaround to accelerate your product development cycle.
Our Certificates
As one of the leading connectors manufacturers and suppliers in China, we warmly welcome you to buy bulk high-grade connectors for sale here from our factory. All customized products are with high quality and competitive price.