Circular Connectors

Image Part Number Description / PDF Quantity Rfq
ACC-03BFFC-LL7AP0

ACC-03BFFC-LL7AP0

LTW (Amphenol LTW)

CONN PLUG FMALE 3POS GOLD CRIMP

31

ACB-05AFFM-LL7A01

ACB-05AFFM-LL7A01

LTW (Amphenol LTW)

MIDDLE STAMPING PIN

0

M12A-08PMMS-SH8002

M12A-08PMMS-SH8002

LTW (Amphenol LTW)

M12 PANEL SOLDER CONN

0

ABD-03RMFS-LC7001

ABD-03RMFS-LC7001

LTW (Amphenol LTW)

STANDARD STAMPING PIN

0

MSAP-08PFFP-SF8002

MSAP-08PFFP-SF8002

LTW (Amphenol LTW)

M12 CONN PCB

0

CB-03BMFC-RL7001

CB-03BMFC-RL7001

LTW (Amphenol LTW)

MIDDLE

0

ABD-05BFFM-LL7A01

ABD-05BFFM-LL7A01

LTW (Amphenol LTW)

STANDARD STAMPING PIN

0

DD-14RFMC-RC7B10

DD-14RFMC-RC7B10

LTW (Amphenol LTW)

CONN RCPT ML 14P WIR LEAD 0.33'

0

CD-09PMFS-QC8001

CD-09PMFS-QC8001

LTW (Amphenol LTW)

MIDDLE RECEPTACLE(FRONT)

0

ACB-04PMMS-SC7001

ACB-04PMMS-SC7001

LTW (Amphenol LTW)

MIDDLE STAMPING PIN

0

PWG-04BFFB-SL7001

PWG-04BFFB-SL7001

LTW (Amphenol LTW)

POWER 16A

0

PWH-03PMMB-SC7001

PWH-03PMMB-SC7001

LTW (Amphenol LTW)

POWER 25A

0

ABD-05PMFS-SC7001

ABD-05PMFS-SC7001

LTW (Amphenol LTW)

STANDARD STAMPING PIN

0

PWE-06BFFA-SL7001

PWE-06BFFA-SL7001

LTW (Amphenol LTW)

POWER 8A

0

CD-07PMFS-QC8001

CD-07PMFS-QC8001

LTW (Amphenol LTW)

MIDDLE RECEPTACLE(FRONT)

0

CD-07AFFM-RL7A01

CD-07AFFM-RL7A01

LTW (Amphenol LTW)

MIDDLE

0

M12A-08PFFS-SH8002

M12A-08PFFS-SH8002

LTW (Amphenol LTW)

M12 PANEL SOLDER CONN

0

BSD-05BFFM-SR6A05

BSD-05BFFM-SR6A05

LTW (Amphenol LTW)

STANDARD

0

DC-03RFMC-RC7A10

DC-03RFMC-RC7A10

LTW (Amphenol LTW)

LARGE

0

ABB-02PMMS-SC7001

ABB-02PMMS-SC7001

LTW (Amphenol LTW)

STANDARD STAMPING PIN

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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