Circular Connectors

Image Part Number Description / PDF Quantity Rfq
820B002-273L501

820B002-273L501

NorComp

CONN RCPT FMALE 2P GOLD SLDR CUP

7

860-003-113R004

860-003-113R004

NorComp

CONN RCPT MALE 3POS GOLD SOLDER

10

8P1P00917BVL421

8P1P00917BVL421

NorComp

CONN PLUG MALE 9POS SOLDER CUP

0

8P1P00717BNL521

8P1P00717BNL521

NorComp

CONN PLUG MALE 7POS SOLDER CUP

0

860-004-113R004

860-004-113R004

NorComp

CONN RCPT MALE 4POS GOLD SOLDER

0

822B026-203RF01

822B026-203RF01

NorComp

CONN RCPT FMALE 26P SOLDER CUP

10

8P1P010210GRF01

8P1P010210GRF01

NorComp

CONN RCPT FMALE 10POS GOLD SLDR

18

8P1P00317BGL621

8P1P00317BGL621

NorComp

CONN PLUG MALE 3P GOLD SLDR CUP

16

8P1P00217NNL421

8P1P00217NNL421

NorComp

CONN PLUG MALE 2POS SOLDER CUP

0

858-005-203RKT4

858-005-203RKT4

NorComp

CONN PLUG FMALE 5P GOLD SLDR CUP

37

8P1P00317BVL521

8P1P00317BVL521

NorComp

CONN PLUG MALE 3POS SOLDER CUP

0

858-004-103RSS1

858-004-103RSS1

NorComp

CONN RCPT MALE 4P GOLD SLDR CUP

28

821B004-103R001

821B004-103R001

NorComp

CONN PLUG MALE 4P GOLD SLDR CUP

34

8P1P004210GRBR1

8P1P004210GRBR1

NorComp

CONN RCPT FMALE 4POS GOLD SOLDER

5

858-006-103RKT1

858-006-103RKT1

NorComp

CONN RCPT MALE 6POS SOLDER CUP

0

860-005-113R004

860-005-113R004

NorComp

CONN RCPT MALE 5POS GOLD SOLDER

19

859-008-103R004

859-008-103R004

NorComp

CONN RCPT MALE 8P GOLD SLDR CUP

29

852-002-213R001

852-002-213R001

NorComp

CONN PLUG FMALE 2POS GOLD SOLDER

53

8P1P00917NJL421

8P1P00917NJL421

NorComp

CONN PLUG MALE 9POS SOLDER CUP

0

851-003-103R001

851-003-103R001

NorComp

CONN RCPT MALE 3P GOLD SLDR CUP

130

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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