Circular Connectors

Image Part Number Description / PDF Quantity Rfq
M12B-05PMMR-SF7003

M12B-05PMMR-SF7003

LTW (Amphenol LTW)

M12 CONN RA BCODE MATED IP

0

105-02PMFS-SH7001

105-02PMFS-SH7001

LTW (Amphenol LTW)

M 10.5 CONN

0

MSDS-04PMMP-SF8002

MSDS-04PMMP-SF8002

LTW (Amphenol LTW)

M12 PANEL PCB CONN

0

BD-05BMFA-LL6001

BD-05BMFA-LL6001

LTW (Amphenol LTW)

STANDARD

0

ACD-08PMFS-SC7001

ACD-08PMFS-SC7001

LTW (Amphenol LTW)

MIDDLE STAMPING PIN

0

BA-070707-FMM-TL001

BA-070707-FMM-TL001

LTW (Amphenol LTW)

STANDARD

0

BB-02PMFS-QC800P

BB-02PMFS-QC800P

LTW (Amphenol LTW)

STANDARD RECEPTACLE(FRONT)

0

CBD-08AFFM-QL8F01

CBD-08AFFM-QL8F01

LTW (Amphenol LTW)

CIRCULAR MIDDLE

0

BA-060606-FMM-TL001

BA-060606-FMM-TL001

LTW (Amphenol LTW)

STANDARD

0

BD-02BFFA-SL6001

BD-02BFFA-SL6001

LTW (Amphenol LTW)

STANDARD

0

DD-12RFFC-RC7B10

DD-12RFFC-RC7B10

LTW (Amphenol LTW)

CONN RCPT FML 18P WIR LEAD 0.33'

0

DC-03AFFM-RL7A01

DC-03AFFM-RL7A01

LTW (Amphenol LTW)

LARGE

0

BD-06BFMA-SL7001

BD-06BFMA-SL7001

LTW (Amphenol LTW)

STANDARD

0

ACD-10AFFM-LL7A01

ACD-10AFFM-LL7A01

LTW (Amphenol LTW)

MIDDLE STAMPING PIN

0

DC-04AFMM-RL7A01

DC-04AFMM-RL7A01

LTW (Amphenol LTW)

LARGE

0

PWC-03BFFA-LL7001

PWC-03BFFA-LL7001

LTW (Amphenol LTW)

POWER 20A

0

M12A-04PMMR-SF8001

M12A-04PMMR-SF8001

LTW (Amphenol LTW)

CONN M12 MALE RA 4PIN PCB PG9

0

BSD-08BFFM-SR6A02

BSD-08BFFM-SR6A02

LTW (Amphenol LTW)

STANDARD

0

M12A-03PMMC-SH8C15

M12A-03PMMC-SH8C15

LTW (Amphenol LTW)

CONN PLUG MALE 3P WIR LEAD 0.49'

0

M12D-04PMMR-SF7003

M12D-04PMMR-SF7003

LTW (Amphenol LTW)

M12 CONN RA DCODE MATED IP

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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