Circular Connectors - Contacts

Image Part Number Description / PDF Quantity Rfq
RMM26W-1D28

RMM26W-1D28

Souriau-Sunbank by Eaton

MIN COAX INNER PIN CONTA

6

82911465N

82911465N

Souriau-Sunbank by Eaton

CONTACT PIN 14AWG CRIMP

0

82911464K

82911464K

Souriau-Sunbank by Eaton

CONTACT SOCKET 14AWG CRIMP GOLD

0

85990731900

85990731900

Souriau-Sunbank by Eaton

38999 22D SKT CON SHORT PCB

0

85990726900

85990726900

Souriau-Sunbank by Eaton

CONTACT PIN SZ 16 PCB GOLD

1105

CF16PC48RF

CF16PC48RF

Souriau-Sunbank by Eaton

CONTACT PIN 16-18AWG CRIMP GOLD

0

LRM20W28DJ5

LRM20W28DJ5

Souriau-Sunbank by Eaton

PIN COMPLETE

0

SM20W-3TK6

SM20W-3TK6

Souriau-Sunbank by Eaton

.040 PIN REEL ASSY SZ20

0

ELIO18WELA

ELIO18WELA

Souriau-Sunbank by Eaton

SZ 16 ELIO CONTACT SINGLEMODE

1

82911456A

82911456A

Souriau-Sunbank by Eaton

CONTACT SOCKET 22-26AWG CRIMP

0

SM24W-3TK6

SM24W-3TK6

Souriau-Sunbank by Eaton

.040 PIN REEL ASSY SZ24

0

82911456K

82911456K

Souriau-Sunbank by Eaton

CONTACT SOCKET 22-26AWG CRIMP

0

85990725900

85990725900

Souriau-Sunbank by Eaton

38999 SOCKET CONTACT #20

23622

85990720900

85990720900

Souriau-Sunbank by Eaton

38999 CON 22D PIN PCB LONG

0

85990308

85990308

Souriau-Sunbank by Eaton

38999 8D DUMMY CONTACT SZ 8

0

CM10PS10MQ

CM10PS10MQ

Souriau-Sunbank by Eaton

CONTACT PIN 18AWG SLDR CUP GOLD

0

RCMX110-1D28

RCMX110-1D28

Souriau-Sunbank by Eaton

MIN COAX OUTER BODY,FEMA

0

SM16M1D70

SM16M1D70

Souriau-Sunbank by Eaton

2PC STRIP HYF PIN #18-16

0

SM14M1S6REV

SM14M1S6REV

Souriau-Sunbank by Eaton

2 PC. STRIP HYF PIN

0

SC24W-3TK6

SC24W-3TK6

Souriau-Sunbank by Eaton

.040 SOC REEL ASSY SZ24

0

Circular Connectors - Contacts

1. Overview

Circular connectors - contacts are electro-mechanical components designed to establish electrical connections between circuits in a circular interface configuration. These contacts serve as critical conduits for power, signal, or data transmission in complex systems. Their importance spans across industries requiring reliable connectivity in harsh environments, including aerospace, industrial automation, and medical devices. Modern advancements demand miniaturization, higher bandwidth, and improved durability in these components.

2. Main Types & Functional Classification

TypeFunctional CharacteristicsApplication Examples
Power ContactsHigh current capacity (up to 100A), thermal resistanceIndustrial machinery, EV charging stations
Signal ContactsLow noise, impedance controlTelecom equipment, control systems
Coaxial Contacts50/75 impedance, EMI shieldingRadar systems, test equipment
Fiber Optic ContactsLow insertion loss, multi-channel transmissionHigh-speed data networks, avionics
Hybrid ContactsCombined power/signal/data in single interfaceAutonomous vehicle sensors, robotics

3. Structure & Composition

Typical construction includes:

  • Contact pins/sockets: Copper alloys (phosphor bronze, beryllium copper) with plating (gold, silver, tin)
  • Insulation housing: Thermoplastic (LCP, PBT) or thermoset materials
  • Shell: Aluminum, stainless steel, or composite materials
  • Contact retention system: Spring-loaded mechanisms for vibration resistance
  • Environmental seals: Elastomer gaskets for IP67+ protection

Modular designs allow mixed contact configurations with polarization keys to prevent mis-mating.

4. Key Technical Specifications

ParameterTypical RangeImportance
Current Rating1-100ADetermines power transmission capability
Voltage Rating50-1500VSafety and insulation performance
Contact Resistance1-15m Signal integrity and power efficiency
Insulation Resistance100M -10G EI/EMC compliance
Temperature Range-65 C to +200 CEnvironmental durability
Mating Cycles500-10,000Service life and reliability

5. Application Fields

  • Aerospace: Flight control systems, in-flight entertainment
  • Industrial Automation: Robotics, CNC machines
  • Medical Equipment: MRI scanners, patient monitoring systems
  • Transportation: Rail signaling, automotive sensors
  • Defense: Radar systems, secure communications

Case Study: In wind turbines, circular connectors handle pitch control signals with IP68 protection against dust/moisture.

6. Leading Manufacturers

ManufacturerRepresentative ProductKey Features
AmphenolSeries 800 CircularHigh-speed data transmission up to 10Gbps
TE ConnectivityDEUTSCH DT SeriesExtreme temperature resistance (-65 C to +200 C)
MolexCircular MIL-DTL-38999Shock/vibration rated for military vehicles
DelphiMini-Circular ConnectorCompact design for automotive sensor networks

7. Selection Guidelines

Key considerations:

  • Current/voltage requirements vs. contact material properties
  • Environmental protection level (IP rating)
  • Mating/unmating force requirements
  • Signal integrity needs (frequency, crosstalk)
  • Compliance with standards (MIL-DTL-38999, IEC 61076)
  • Cost vs. lifecycle trade-offs

Recommendation: Aerospace applications should prioritize weight reduction with composite shells, while industrial uses need corrosion-resistant plating.

8. Industry Trends

Emerging developments include:

  • Micro-miniaturization for IoT device integration
  • High-speed contacts supporting 40+ Gbps data rates
  • Smart connectors with integrated sensors
  • Alternative plating materials (nanocoatings) for RoHS compliance
  • Modular hybrid designs combining power/optical contacts

Market growth driven by 5G infrastructure and electric vehicle adoption, projected CAGR of 6.8% (2023-2030).

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