Circular Connectors

Image Part Number Description / PDF Quantity Rfq
M12A-04PMMS-SH8001

M12A-04PMMS-SH8001

LTW (Amphenol LTW)

CONN PLUG MALE 4P GOLD SLDR CUP

55

M12A-03PMMS-SF8001

M12A-03PMMS-SF8001

LTW (Amphenol LTW)

CONN PLUG MALE 3P GOLD SLDR CUP

946

AD-03PMMS-QC8001

AD-03PMMS-QC8001

LTW (Amphenol LTW)

CONN RCPT MALE 3P GOLD SLDR CUP

54

AD-03PMMP-QC8001

AD-03PMMP-QC8001

LTW (Amphenol LTW)

CONN RCPT MALE 3POS GOLD SOLDER

41

M12A-03PFFS-SF8001

M12A-03PFFS-SF8001

LTW (Amphenol LTW)

CONN RCPT FMALE 3P GOLD SLDR CUP

105

ABD-08PMMS-LC7001

ABD-08PMMS-LC7001

LTW (Amphenol LTW)

CONN RCPT MALE 8P GOLD SLDR CUP

0

BB-04BMMA-QL8SPP

BB-04BMMA-QL8SPP

LTW (Amphenol LTW)

CONN RCPT MALE 4POS GOLD CRIMP

8

BA-080808-FMM-TL001

BA-080808-FMM-TL001

LTW (Amphenol LTW)

STANDARD

0

ADD-18RMFS-LC7001

ADD-18RMFS-LC7001

LTW (Amphenol LTW)

LARGE STAMPING PIN

0

M12A-05PFFR-SF8002

M12A-05PFFR-SF8002

LTW (Amphenol LTW)

M12 CONN RIGHT ANGLE ACODE

0

DC-02RFMC-RS7A10

DC-02RFMC-RS7A10

LTW (Amphenol LTW)

LARGE

0

M12A-10PMMS-SF8B15

M12A-10PMMS-SF8B15

LTW (Amphenol LTW)

CONN PLUG ML 12P WIR LEAD 0.49'

0

MSDP-04BMMB-SL7001

MSDP-04BMMB-SL7001

LTW (Amphenol LTW)

M12 CONN SCREW IN 180

0

CDU-12AFMM-XL7A10

CDU-12AFMM-XL7A10

LTW (Amphenol LTW)

MIDDLE

0

BB-02PMMS-QC800P

BB-02PMMS-QC800P

LTW (Amphenol LTW)

STANDARD RECEPTACLE(FRONT)

0

DC-03AFMM-RL7A01

DC-03AFMM-RL7A01

LTW (Amphenol LTW)

LARGE

0

MC-05PFFS-SF8001

MC-05PFFS-SF8001

LTW (Amphenol LTW)

M12 CONN

0

M12A-03PMMS-SF8002

M12A-03PMMS-SF8002

LTW (Amphenol LTW)

M12 PANEL SOLDER CONN

0

BSD-06BFFM-SL6A10

BSD-06BFFM-SL6A10

LTW (Amphenol LTW)

STANDARD

0

BSD-04BFFM-SR6A02

BSD-04BFFM-SR6A02

LTW (Amphenol LTW)

STANDARD

0

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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