Circular Connectors - Contacts

Image Part Number Description / PDF Quantity Rfq
SAM20D-03G03

SAM20D-03G03

LTW (Amphenol LTW)

CONTACT PIN SZ20 CRIMP 1=100PCS

0

SAM12C-01G03

SAM12C-01G03

LTW (Amphenol LTW)

CONTACT PIN SZ12 CRIMP GOLD

0

SAM16B-02G03

SAM16B-02G03

LTW (Amphenol LTW)

CONTACT PIN SZ16 CRIMP GOLD

0

SAF12C-03G03

SAF12C-03G03

LTW (Amphenol LTW)

CONTACT SOCKET 12-14AWG CRIMP

0

SAF16B-02G03

SAF16B-02G03

LTW (Amphenol LTW)

CONTACT SOCKET SZ16 CRIMP GOLD

0

SAM20D-02G03

SAM20D-02G03

LTW (Amphenol LTW)

CONTACT PIN SZ20 CRIMP GOLD

0

SAF16B-01G03

SAF16B-01G03

LTW (Amphenol LTW)

CONTACT SOCKET SZ16 CRIMP GOLD

0

SAM20D-01G03

SAM20D-01G03

LTW (Amphenol LTW)

CONTACT PIN SZ20 CRIMP GOLD

0

SAM16B-03G03

SAM16B-03G03

LTW (Amphenol LTW)

CONTACT PIN 16-18AWG CRIMP GOLD

406

SAM12C-02G03

SAM12C-02G03

LTW (Amphenol LTW)

CONTACT PIN SZ12 CRIMP GOLD

0

SAF20D-03G03

SAF20D-03G03

LTW (Amphenol LTW)

CONTACT SOCKET SZ20 CRIMP GOLD

0

SAF20D-02G03

SAF20D-02G03

LTW (Amphenol LTW)

CONTACT SOCKET SZ20 CRIMP GOLD

0

SAF12C-01G03

SAF12C-01G03

LTW (Amphenol LTW)

CONTACT SOCKET SZ12 CRIMP GOLD

0

SAF12C-02G03

SAF12C-02G03

LTW (Amphenol LTW)

CONTACT SOCKET SZ12 CRIMP GOLD

0

SAM16B-01G03

SAM16B-01G03

LTW (Amphenol LTW)

CONTACT PIN SZ16 CRIMP GOLD

0

SAF16B-03G03

SAF16B-03G03

LTW (Amphenol LTW)

CONTACT SOCKET 16-18AWG CRIMP

0

SAM12C-03G03

SAM12C-03G03

LTW (Amphenol LTW)

CONTACT PIN 12-14AWG CRIMP GOLD

0

SAF20D-01G03

SAF20D-01G03

LTW (Amphenol LTW)

CONTACT SOCKET SZ20 CRIMP GOLD

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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