Circular Connectors

Image Part Number Description / PDF Quantity Rfq
43-01282

43-01282

CONEC

CONN FEMALE M12

0

42-01145

42-01145

CONEC

CONN RCPT FMALE 5POS GOLD SOLDER

0

43-12483

43-12483

CONEC

CONN RCPT MALE 4POS GOLD SOLDER

0

42-01143

42-01143

CONEC

CONN RCPT FMALE 3POS GOLD SOLDER

0

43-01124

43-01124

CONEC

CONN PLUG FMALE 4POS GOLD SOLDER

0

43-01225

43-01225

CONEC

CONN PLUG FMALE 4POS GOLD SOLDER

0

43-00280

43-00280

CONEC

CONN PLUG FMALE 4POS SCREW

0

43-00051

43-00051

CONEC

CONN RCPT MALE 5POS GOLD CLAMP

0

42-00025

42-00025

CONEC

CONN RCPT MALE 3POS GOLD SCREW

0

43-01066

43-01066

CONEC

CONN RCPT MALE 4POS GOLD SOLDER

0

43-01063

43-01063

CONEC

CONN PLUG FMALE 8POS GOLD SOLDER

0

42-01003

42-01003

CONEC

CONN PLUG MALE 4P GOLD SLDR CUP

0

42-01007

42-01007

CONEC

CONN PLUG MALE 4P GOLD SLDR CUP

0

43-01635

43-01635

CONEC

CONN RCPT MALE 8POS GOLD SOLDER

0

43-01190

43-01190

CONEC

CONN RCPT MALE 4POS GOLD SOLDER

0

43-01251

43-01251

CONEC

CONN RCPT MALE 4POS GOLD SOLDER

0

43-00116

43-00116

CONEC

CONN RCPT MALE 5POS GOLD SCREW

0

43-01030

43-01030

CONEC

CONN PLUG FMALE 5POS GOLD SOLDER

0

43-01849

43-01849

CONEC

CONN FMALE INSERT 5P GOLD SOLDER

0

43-00133

43-00133

CONEC

CONN RCPT MALE 8POS GOLD SCREW

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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