Circular Connectors

Image Part Number Description / PDF Quantity Rfq
M12A-12PMMP-SF8001

M12A-12PMMP-SF8001

LTW (Amphenol LTW)

CONN PLUG MALE 12POS GOLD SOLDER

0

BD-03RMMS-QC8001

BD-03RMMS-QC8001

LTW (Amphenol LTW)

CONN RCPT MALE 3P GOLD SLDR CUP

39

BD-04BFMA-SL7001

BD-04BFMA-SL7001

LTW (Amphenol LTW)

CONN PLUG MALE 4P GOLD SLDR CUP

25

M12A-05BMMB-SR7001

M12A-05BMMB-SR7001

LTW (Amphenol LTW)

CONN PLUG MALE 5POS GOLD SCREW

16

BD-07BFFA-LL7001

BD-07BFFA-LL7001

LTW (Amphenol LTW)

CONN PLUG FMALE 7P GOLD SLDR CUP

0

M12S-04PMMS-SF8B15

M12S-04PMMS-SF8B15

LTW (Amphenol LTW)

CONN PLUG MALE 4P WIR LEAD 0.49'

0

DC-03BMMB-LL7001

DC-03BMMB-LL7001

LTW (Amphenol LTW)

CIRCULAR LARGE SIZE FIELD INSTAL

25

M12S-04BMMB-SL7002

M12S-04BMMB-SL7002

LTW (Amphenol LTW)

CONN PLUG MALE 4POS GOLD SCREW

9

BD-05BFMA-QL8MP0

BD-05BFMA-QL8MP0

LTW (Amphenol LTW)

CONN PLUG MALE 5POS GOLD CRIMP

0

BD-06PMMS-QC8001

BD-06PMMS-QC8001

LTW (Amphenol LTW)

CONN RCPT MALE 6P GOLD SLDR CUP

3

CC-03PMMS-QC800P

CC-03PMMS-QC800P

LTW (Amphenol LTW)

CONN RCPT MALE 3P GOLD SLDR CUP

0

BD-03PMFP-LC7001

BD-03PMFP-LC7001

LTW (Amphenol LTW)

CONN RCPT FMALE 3POS GOLD SOLDER

61

BD-04PMFS-QC8001

BD-04PMFS-QC8001

LTW (Amphenol LTW)

CONN RCPT FMALE 4POS SOLDER CUP

0

AAD-03PMMS-LC7001

AAD-03PMMS-LC7001

LTW (Amphenol LTW)

CONN RCPT MALE 3P GOLD SLDR CUP

80

M12D-04PFFS-SH8002

M12D-04PFFS-SH8002

LTW (Amphenol LTW)

CONN RCPT FMALE 4P GOLD SLDR CUP

52

M12T-04PFFS-SF8B15

M12T-04PFFS-SF8B15

LTW (Amphenol LTW)

CONN RCPT FML 4P WIR LEAD 0.49'

0

BB-02BFFA-LL7001

BB-02BFFA-LL7001

LTW (Amphenol LTW)

CONN PLUG FMALE 2P GOLD SLDR CUP

41

FLKB-07EGFS-GCP-001

FLKB-07EGFS-GCP-001

LTW (Amphenol LTW)

CONN RCPT FMALE 7P GOLD SLDR CUP

16

FLKD-14FGMS-GCP-215

FLKD-14FGMS-GCP-215

LTW (Amphenol LTW)

CONN PLUG MALE 14P GOLD SLDR CUP

20

DC-05BFFB-QL8APP

DC-05BFFB-QL8APP

LTW (Amphenol LTW)

CONN PLUG FMALE 5P SILVER SCREW

37

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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