Circular Connectors

Image Part Number Description / PDF Quantity Rfq
933172100

933172100

Lumberg Automation

ELWIKA 4012 PG 7 BLACK

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700000166

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RSMEK 4

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934034100

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ELST 412 FA 14 S

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ELKE 412 PG 9

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600004325

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Lumberg Automation

RSEL 8

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934636458

934636458

Lumberg Automation

RSELP 4

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600005180

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RKCW 3U/9 PACKAGE OF 5

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900000510

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0986 EFC 100

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600005186

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RKCW 5/9 PACKAGE OF 5

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930959517

930959517

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MAK 4100 GRAY

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900000034

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0939 CTX 303

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932255500

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Lumberg Automation

MIB 100 V

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600005196

600005196

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RSC 8/9 PACKAGE OF 5

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932321107

932321107

Lumberg Automation

CA 3 GD WHITE

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933408100

933408100

Lumberg Automation

ELWIST 3008 V

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932625106

932625106

Lumberg Automation

N11R AF 5

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933725100

933725100

Lumberg Automation

ELKA 4012 K PG7 BLACK

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932326100

932326100

Lumberg Automation

CA 6 GS

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932460100

932460100

Lumberg Automation

CM 06 EA 14S-61S

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500000515

500000515

Lumberg Automation

RSC 50/9 SINGLE PACKAGE OF 1

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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