Circular Connectors

Image Part Number Description / PDF Quantity Rfq
42-00002

42-00002

CONEC

CONN PLUG FMALE 3P SPRING TYPE

2

17-400323

17-400323

CONEC

CONN RCPT FMALE 3POS GOLD CRIMP

0

43-01181

43-01181

CONEC

CONN PLUG FMALE 5POS GOLD SOLDER

37

17-400153

17-400153

CONEC

CONN PLUG MALE 2POS GOLD CRIMP

17

43-02757

43-02757

CONEC

CONN PLUG FMALE 8POS GOLD SOLDER

28

17-400353

17-400353

CONEC

CONN PLUG MALE 2POS GOLD CRIMP

0

43-01026

43-01026

CONEC

CONN PLUG FMALE 4POS GOLD SOLDER

529

43-01182

43-01182

CONEC

CONN RCPT MALE 4POS GOLD SOLDER

5

43-01183

43-01183

CONEC

CONN RCPT MALE 4POS GOLD SOLDER

0

42-00003

42-00003

CONEC

CONN RCPT MALE 4P SPRING TYPE

7

43-00132

43-00132

CONEC

CONN RCPT MALE 8POS GOLD SCREW

132

41-00002

41-00002

CONEC

CONN PLUG FMALE 4POS GOLD SCREW

0

43-02758

43-02758

CONEC

CONN PLUG FMALE 8POS GOLD SOLDER

49

41-00001

41-00001

CONEC

CONN PLUG FMALE 3POS GOLD SCREW

0

42-00012

42-00012

CONEC

CONN PLUG FMALE 4POS GOLD SCREW

11

43-01169

43-01169

CONEC

CONN RCPT MALE 5POS GOLD SOLDER

0

43-02759

43-02759

CONEC

CONN PLUG FMALE 8POS GOLD SOLDER

0

43-00098

43-00098

CONEC

CONN PLUG FMALE 5POS GOLD SCREW

191

42-00008

42-00008

CONEC

CONN PLUG FMALE 4P GOLD SLDR CUP

339

43-01170

43-01170

CONEC

CONN PLUG FMALE 4POS 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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