Circular Connectors

Image Part Number Description / PDF Quantity Rfq
CU-18PMMP-LC7001

CU-18PMMP-LC7001

LTW (Amphenol LTW)

CONN RCPT MALE 18POS GOLD SOLDER

48

DC-03BFMB-LL7001

DC-03BFMB-LL7001

LTW (Amphenol LTW)

CIRCULAR LARGE SIZE FIELD INSTAL

25

FLKC-07EGFS-GCP-001

FLKC-07EGFS-GCP-001

LTW (Amphenol LTW)

CONN RCPT FMALE 7P GOLD SLDR CUP

3

M12D-04PFFC-SH8B15

M12D-04PFFC-SH8B15

LTW (Amphenol LTW)

CONN RCPT FML 4P WIR LEAD 0.49'

18

FLBC-08EGFS-GCP-001

FLBC-08EGFS-GCP-001

LTW (Amphenol LTW)

CONN RCPT FMALE 8P GOLD SLDR CUP

17

M12D-04PFFS-SH8001

M12D-04PFFS-SH8001

LTW (Amphenol LTW)

CONN RCPT FMALE 4P GOLD SLDR CUP

0

M12A-05BMMB-SL7001

M12A-05BMMB-SL7001

LTW (Amphenol LTW)

CONN PLUG MALE 5POS GOLD SCREW

62

M12A-04PFFS-SF8001

M12A-04PFFS-SF8001

LTW (Amphenol LTW)

CONN RCPT FMALE 4P GOLD SLDR CUP

235

ABD-06PMMS-SC7001

ABD-06PMMS-SC7001

LTW (Amphenol LTW)

CONN RCPT MALE 6P GOLD SLDR CUP

90

M12A-08PMMS-SF8001

M12A-08PMMS-SF8001

LTW (Amphenol LTW)

CONN PLUG MALE 8P GOLD SLDR CUP

485

DC-03BFFB-LL7001

DC-03BFFB-LL7001

LTW (Amphenol LTW)

CIRCULAR LARGE SIZE FIELD INSTAL

500

AD-03BFFA-LL7001

AD-03BFFA-LL7001

LTW (Amphenol LTW)

CONN PLUG FMALE 3P GOLD SLDR CUP

0

M12A-04BFFB-SL7001

M12A-04BFFB-SL7001

LTW (Amphenol LTW)

CONN RCPT FMALE 4POS GOLD SCREW

66

BU-12BFFA-SL7001

BU-12BFFA-SL7001

LTW (Amphenol LTW)

CONN PLUG FMALE 12P SOLDER CUP

530

M12A-05PFFS-SF8002

M12A-05PFFS-SF8002

LTW (Amphenol LTW)

CONN RCPT FMALE 5P GOLD SLDR CUP

0

AD-02PMMS-QC8001

AD-02PMMS-QC8001

LTW (Amphenol LTW)

CONN RCPT MALE 2P GOLD SLDR CUP

47

AD-05BMMB-QL8AP0

AD-05BMMB-QL8AP0

LTW (Amphenol LTW)

CONN RCPT MALE 5POS GOLD SCREW

16

AD-03PMMP-LC7001

AD-03PMMP-LC7001

LTW (Amphenol LTW)

CONN RCPT MALE 3POS GOLD SOLDER

50

CDU-12BFMA-LL7001

CDU-12BFMA-LL7001

LTW (Amphenol LTW)

CONN PLUG MALE 12P GOLD SLDR CUP

8

ACD-14BFFC-LL7AP0

ACD-14BFFC-LL7AP0

LTW (Amphenol LTW)

CONN PLUG FMALE 14POS GOLD CRIMP

24

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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