Circular Connectors

Image Part Number Description / PDF Quantity Rfq
BBD-06PMFS-QC8001

BBD-06PMFS-QC8001

LTW (Amphenol LTW)

CONN RCPT FMALE 6P GOLD SLDR CUP

23

M12A-04PMMS-SH8002

M12A-04PMMS-SH8002

LTW (Amphenol LTW)

CONN PLUG MALE 4P GOLD SLDR CUP

0

FLKD-05EGFS-GCP-001

FLKD-05EGFS-GCP-001

LTW (Amphenol LTW)

CONN RCPT FMALE 5P GOLD SLDR CUP

12

FLKC-05FGMS-GCP-213

FLKC-05FGMS-GCP-213

LTW (Amphenol LTW)

CONN PLUG MALE 5P GOLD SLDR CUP

25

BB-04BFFA-QL8SPP

BB-04BFFA-QL8SPP

LTW (Amphenol LTW)

CONN PLUG FMALE 4POS GOLD CRIMP

0

FLBC-07EGFS-GCP-001

FLBC-07EGFS-GCP-001

LTW (Amphenol LTW)

CONN RCPT FMALE 7P GOLD SLDR CUP

22

ADD-18BMFC-LL7AP0

ADD-18BMFC-LL7AP0

LTW (Amphenol LTW)

CONN RCPT FMALE 18POS GOLD CRIMP

35

M12A-08PFFP-SF8001

M12A-08PFFP-SF8001

LTW (Amphenol LTW)

CONN RCPT FMALE 8POS GOLD SOLDER

0

ABD-04PMMS-SC7001

ABD-04PMMS-SC7001

LTW (Amphenol LTW)

CONN RCPT MALE 4P GOLD SLDR CUP

33

M12A-04PFFP-SF8001

M12A-04PFFP-SF8001

LTW (Amphenol LTW)

CONN RCPT FMALE 4POS GOLD SOLDER

347

AD-03BMMB-QL8AP0

AD-03BMMB-QL8AP0

LTW (Amphenol LTW)

CONN RCPT MALE 3POS GOLD SCREW

17

CD-14BMMA-LL7001

CD-14BMMA-LL7001

LTW (Amphenol LTW)

CONN RCPT MALE 14P GOLD SLDR CUP

0

CC-03BFFB-QL8APP

CC-03BFFB-QL8APP

LTW (Amphenol LTW)

CONN PLUG FMALE 3POS GOLD SCREW

99

BU-12BMMA-LL7001

BU-12BMMA-LL7001

LTW (Amphenol LTW)

CONN RCPT MALE 12P GOLD SLDR CUP

0

CD-08BMFA-LL7001

CD-08BMFA-LL7001

LTW (Amphenol LTW)

CONN RCPT FMALE 8P GOLD SLDR CUP

12

FLKB-02EGFS-GCP-001

FLKB-02EGFS-GCP-001

LTW (Amphenol LTW)

CONN RCPT FMALE 2P GOLD SLDR CUP

9

CD-12BMMA-QL8SP0

CD-12BMMA-QL8SP0

LTW (Amphenol LTW)

CONN RCPT MALE 12POS GOLD CRIMP

9

CC-02BMFB-QL8APP

CC-02BMFB-QL8APP

LTW (Amphenol LTW)

CONN RCPT FMALE 2POS GOLD SCREW

1

AU-06BMMA-LL7001

AU-06BMMA-LL7001

LTW (Amphenol LTW)

CONN RCPT MALE 6P GOLD SLDR CUP

0

DC-02BFFB-LL7001

DC-02BFFB-LL7001

LTW (Amphenol LTW)

CIRCULAR LARGE SIZE FIELD INSTAL

25

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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