Circular Connectors

Image Part Number Description / PDF Quantity Rfq
1122191007

1122191007

Woodhead - Molex

CONN PLUG MALE 5POS SCREW

2

1122190042

1122190042

Woodhead - Molex

CONN RCPT FMALE 5POS SCREW

2

1122190016

1122190016

Woodhead - Molex

CONN RCPT FMALE 3POS SCREW

2

1122191031

1122191031

Woodhead - Molex

CONN PLUG MALE 4POS SCREW

2

1122190003

1122190003

Woodhead - Molex

CONN RCPT FMALE 4POS SCREW

2

1300340005

1300340005

Woodhead - Molex

CONN PLUG FMALE 5POS GOLD SCREW

6

1122191038

1122191038

Woodhead - Molex

CONN PLUG MALE 4POS SCREW

3

1122190007

1122190007

Woodhead - Molex

CONN RCPT FMALE 5POS SCREW

2

1122190045

1122190045

Woodhead - Molex

CONN RCPT FMALE 4POS SCREW

1

1200850005

1200850005

Woodhead - Molex

CONN PLUG MALE 4POS GOLD SCREW

3

1122191020

1122191020

Woodhead - Molex

CONN PLUG MALE 4POS SCREW

2

1122191006

1122191006

Woodhead - Molex

CONN PLUG MALE 4POS SCREW

2

1200910007

1200910007

Woodhead - Molex

CONN PLUG FMALE 4POS GOLD

0

1122190021

1122190021

Woodhead - Molex

CONN RCPT FMALE 5POS SCREW

2

1200910025

1200910025

Woodhead - Molex

CONN PLUG MALE 4POS GOLD SCREW

0

1122190004

1122190004

Woodhead - Molex

CONN RCPT FMALE 4POS SCREW

2

1122191056

1122191056

Woodhead - Molex

CONN PLUG MALE 5POS SCREW

2

1201000001

1201000001

Woodhead - Molex

CONN PLUG FMALE 5POS GOLD SCREW

17

1122191055

1122191055

Woodhead - Molex

CONN PLUG MALE 4POS SCREW

2

1300470035

1300470035

Woodhead - Molex

CONN RCPT MALE 4POS 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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