Circular Connectors

Image Part Number Description / PDF Quantity Rfq
1300170021

1300170021

Woodhead - Molex

CONN RCPT MALE 4POS GOLD SCREW

21

1200710031

1200710031

Woodhead - Molex

CONN PLUG FMALE 8POS GOLD SCREW

18

1122190013

1122190013

Woodhead - Molex

CONN RCPT FMALE 4POS SCREW

2

1122191022

1122191022

Woodhead - Molex

CONN PLUG MALE 3POS SCREW

2

1200850008

1200850008

Woodhead - Molex

CONN PLUG MALE 5POS GOLD SCREW

13

1200710070

1200710070

Woodhead - Molex

CONN PLUG FMALE 5P NICKEL SCREW

2

1122191012

1122191012

Woodhead - Molex

CONN PLUG MALE 3POS SCREW

2

1200710033

1200710033

Woodhead - Molex

CONN PLUG FMALE 4POS GOLD SCREW

7

1122190033

1122190033

Woodhead - Molex

CONN RCPT FMALE 3POS SCREW

2

1122190047

1122190047

Woodhead - Molex

CONN RCPT FMALE 3POS SCREW

2

1200910023

1200910023

Woodhead - Molex

CONN RCPT MALE 3POS GOLD SCREW

2

1122191047

1122191047

Woodhead - Molex

CONN PLUG MALE 3POS SCREW

2

1200710040

1200710040

Woodhead - Molex

CONN RCPT MALE 4POS SILVER SCREW

6

2021131730

2021131730

Woodhead - Molex

CONN PLUG MALE 17POS SOLDER CUP

41

1122191001

1122191001

Woodhead - Molex

CONN PLUG MALE 3POS SCREW

2

1122190054

1122190054

Woodhead - Molex

CONN RCPT FMALE 3POS SCREW

2

1122191002

1122191002

Woodhead - Molex

CONN PLUG MALE 3POS SCREW

3

1122191027

1122191027

Woodhead - Molex

CONN PLUG MALE 4POS SCREW

2

1122190006

1122190006

Woodhead - Molex

CONN RCPT FMALE 4POS SCREW

2

1300170011

1300170011

Woodhead - Molex

CONN RCPT MALE 3POS GOLD SCREW

20

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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