Circular Connectors

Image Part Number Description / PDF Quantity Rfq
21033192401

21033192401

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CONN PLUG FMALE 4POS GOLD SCREW

25

21031211801

21031211801

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CONN PLUG MALE 8POS GOLD IDC

36

09151122612

09151122612

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CONN HAN M23 12POS MALE

9

21023592301

21023592301

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CONN PLUG FMALE 3POS GOLD SCREW

2

21033212425

21033212425

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CONN RCPT FMALE 4POS GOLD IDC

3

21033211418

21033211418

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CONN MALE INSERT 4POS GOLD SLDR

30

21033814434

21033814434

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CONN RCPT FMALE 4POS GOLD SOLDER

0

09151192702

09151192702

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CONN FMALE INSERT 19P SOLDER CUP

10

21033961533

21033961533

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CONN RCPT MALE 4POS GOLD SOLDER

3

21033222400

21033222400

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CONN PLUG FMALE 4POS GOLD IDC

7

21033961530

21033961530

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CONN CIRC RCPT 5POS GOLD SOLDER

8

20820061218

20820061218

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CONN MALE INSERT 8P SPRING TABS

3

21032711505

21032711505

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CONN PLUG MALE 5POS GOLD IDC

0

21033112811

21033112811

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CONN FML INS M12 8POS GOLD 75PCS

150

21420000020

21420000020

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CONN RCPT FMALE 4POS GOLD SOLDER

35

21023593401

21023593401

HARTING

CONN PLUG MALE 4POS GOLD SCREW

11

21032121306

21032121306

HARTING

CONN PLUG MALE 3POS GOLD IDC

14

09151172602

09151172602

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CONN MALE INSERT 17P SOLDER CUP

10

09151062603

09151062603

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CONN MALE INSERT 6POS SOLDER

8

09151062703

09151062703

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CONN FMALE INSERT 6POS SOLDER

8

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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