Circular Connectors

Image Part Number Description / PDF Quantity Rfq
D38999/20FJ61PE

D38999/20FJ61PE

Amphenol Aerospace Operations

CONN RCPT MALE 61POS GOLD CRIMP

0

MS27466T23B35P

MS27466T23B35P

Amphenol Aerospace Operations

CONN RCPT MALE 100POS GOLD CRIMP

0

D38999/26FJ35SN

D38999/26FJ35SN

Amphenol Aerospace Operations

CONN PLUG FMALE 128P GOLD CRIMP

10

D38999/24KG39SN

D38999/24KG39SN

Amphenol Aerospace Operations

CONN RCPT FMALE 39POS GOLD CRIMP

0

MS3471L16-8SZ

MS3471L16-8SZ

Amphenol Aerospace Operations

CONN RCPT FMALE 8POS GOLD CRIMP

0

MS27508E10F98P

MS27508E10F98P

Amphenol Aerospace Operations

CONN RCPT MALE 6POS GOLD CRIMP

0

MS27473T14B18PB

MS27473T14B18PB

Amphenol Aerospace Operations

CONN PLUG MALE 18POS GOLD CRIMP

0

MS27508E22B35P

MS27508E22B35P

Amphenol Aerospace Operations

CONN RCPT MALE 100POS GOLD CRIMP

0

MS27513E10F98P

MS27513E10F98P

Amphenol Aerospace Operations

CONN RCPT MALE 6POS GOLD CRIMP

0

MS3472L18-11SZ

MS3472L18-11SZ

Amphenol Aerospace Operations

CONN RCPT FMALE 11POS GOLD CRIMP

0

MS3472L20-39SW

MS3472L20-39SW

Amphenol Aerospace Operations

CONN RCPT FMALE 39POS GOLD CRIMP

0

MS27474T12B4SA

MS27474T12B4SA

Amphenol Aerospace Operations

CONN RCPT FMALE 4POS GOLD CRIMP

0

MS27656T11B99PA

MS27656T11B99PA

Amphenol Aerospace Operations

CONN RCPT MALE 7POS GOLD CRIMP

0

MS3471W10-6S

MS3471W10-6S

Amphenol Aerospace Operations

CONN RCPT FMALE 6POS GOLD CRIMP

0

D38999/24ZG35PN

D38999/24ZG35PN

Amphenol Aerospace Operations

CONN RCPT MALE 79POS GOLD CRIMP

0

MS27508E22B35S

MS27508E22B35S

Amphenol Aerospace Operations

CONN RCPT FMALE 100P GOLD CRIMP

0

D38999/26FJ35PA

D38999/26FJ35PA

Amphenol Aerospace Operations

CONN PLUG MALE 128POS GOLD CRIMP

0

MS3476L14-9SZ

MS3476L14-9SZ

Amphenol Aerospace Operations

CONN PLUG FMALE 9POS GOLD CRIMP

0

MS27466T11B99PB

MS27466T11B99PB

Amphenol Aerospace Operations

CONN RCPT MALE 7POS GOLD CRIMP

0

D38999/26FF32PN

D38999/26FF32PN

Amphenol Aerospace Operations

CONN PLUG MALE 32POS GOLD CRIMP

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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