Circular Connectors

Image Part Number Description / PDF Quantity Rfq
43-01248

43-01248

CONEC

CONN PLUG FMALE 4POS GOLD SOLDER

0

42-01004

42-01004

CONEC

CONN PLUG MALE 3P GOLD SLDR CUP

0

43-01176

43-01176

CONEC

CONN RCPT MALE 5POS GOLD SOLDER

0

43-01226

43-01226

CONEC

CONN RCPT MALE 4POS GOLD SOLDER

0

43-00026

43-00026

CONEC

CONN RCPT MALE 4POS GOLD CLAMP

0

43-00041

43-00041

CONEC

CONN PLUG FMALE 4POS GOLD CLAMP

0

43-01070

43-01070

CONEC

CONN RCPT MALE 5POS GOLD SOLDER

0

43-01340

43-01340

CONEC

CONN RCPT MALE 4P GOLD SLDR CUP

0

43-01634

43-01634

CONEC

CONN RCPT MALE 8POS SOLDER CUP

0

43-01339

43-01339

CONEC

CONN RCPT MALE 5P GOLD SLDR CUP

0

42-01008

42-01008

CONEC

CONN PLUG MALE 3P GOLD SLDR CUP

0

43-01031

43-01031

CONEC

CONN PLUG FMALE 8POS GOLD SOLDER

0

41-40047

41-40047

CONEC

CONN PLUG FMALE 5POS GOLD SOLDER

0

43-01118

43-01118

CONEC

CONN PLUG FMALE 4POS GOLD SOLDER

0

43-01061

43-01061

CONEC

CONN PLUG FMALE 5POS GOLD SOLDER

0

43-00281

43-00281

CONEC

CONN PLUG FMALE 5POS SCREW

0

43-00077

43-00077

CONEC

CONN RCPT MALE 4POS GOLD CLAMP

0

43-01848

43-01848

CONEC

CONN FMALE INSERT 4P GOLD SOLDER

0

43-00010

43-00010

CONEC

CONN PLUG FMALE 4POS GOLD CLAMP

0

43-01329

43-01329

CONEC

CONN PLUG FMALE 8POS GOLD SOLDER

0

Circular Connectors

1. Overview

Circular connectors are multi-pin electrical connectors with circular contact arrangements, designed for reliable signal/power transmission in harsh environments. They feature robust mechanical structures, environmental sealing, and high mating durability. These connectors are critical in aerospace, industrial automation, and medical equipment where vibration resistance and signal integrity are paramount.

2. Main Types & Functional Classification

TypeFunctional CharacteristicsApplication Examples
MIL-DTL-38999High-density, threaded coupling, EMI shieldingAerospace systems, military vehicles
USB Type-CReversible design, 10Gbps data rate, 100W power deliverySmartphones, laptops, PDAs
BNCBayonet locking, 2GHz frequency rangeTest equipment, video systems
LVDT CircularLinear variable differential transformer integrationIndustrial sensors, robotics

3. Structure & Components

Typical construction includes: - Shell: Aluminum alloy/zinc die-cast housing with corrosion-resistant plating - Contacts: Gold-plated phosphor bronze with 0.5-2.0mm diameter - Insulation: High-temperature thermoplastic (200 C rating) - Sealing: IP67/IP68 rated elastomer gaskets - Mounting: Threaded/flange/clamp mechanisms

4. Key Technical Parameters

ParameterTypical RangeImportance
Voltage Rating50V-600VDetermines power transmission capacity
Current Rating1A-25A/contactAffects thermal performance
Contact Resistance 5m Impacts signal integrity
IP RatingIP40-IP68Defines environmental protection level
Operating Temp-65 C to +200 CMaterial stability indicator
Mating Cycles500-10,000Service life predictor

5. Application Fields

  • Aerospace: Flight control systems, satellite antennas
  • Industrial: CNC machines, automated guided vehicles
  • Medical: MRI scanners, patient monitoring systems
  • Telecom: 5G base stations, fiber optic networks
  • Consumer: VR headsets, gaming peripherals

6. Leading Manufacturers

ManufacturerKey ProductsSpecial Features
AmphenolMIL-DTL-38999 seriesComposite materials, EMI filtering
TE ConnectivityDEUTSCH D38999Thermoplastic housing, 2000V dielectric
MolexUSB Type-C 10GbpsShielded twinax design
DelphiAutomotive circular connectorsIP69K rating for EV charging
LemoPush-pull circular seriesSubminiature, 5000+ mating cycles

7. Selection Guidelines

Key considerations: 1. Environmental factors: Temperature extremes, fluid exposure 2. Electrical requirements: Signal type (analog/digital), current load 3. Mechanical constraints: Panel space, mating force limitations 4. Compliance standards: MIL-STD, ISO 6722, RoHS 5. Cost vs. longevity: High-cycle applications justify premium connectors

8. Industry Trends

Emerging developments include: - Miniaturization: 1.0mm contact pitch enabling wearable devices - High-speed transmission: 25Gbps+ differential pairs for industrial IoT - Smart connectors: Integrated sensors for condition monitoring - Material innovation: Graphene-coated contacts reducing resistance - Eco-design: Halogen-free thermoplastics meeting REACH regulations

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