Circular Cable Assemblies

Part Number	Description / PDF	Quantity
21033836407 HARTING	M12 D-CODE 4PIN FEMALE PANEL FEE	0
21348500882020 HARTING	CBL FMALE TO WIRE LEAD 8P 6.56'	9
21349400405010 HARTING	CBL MALE RA TO WIRE LD 4P 3.28'	29
21348485484010 HARTING	CBL FMALE TO MALE 4POS 3.28'	17
21348100380005 HARTING	CBL FMALE TO WIRE LEAD 3P 1.64'	7
21348687C78010 HARTING	CBL FML RA TO MALE RA 12P 3.28'	2
21033176305 HARTING	CBL FMALE TO WIRE LEAD 4P 1.64'	10
21348485390050 HARTING	CBL FMALE TO MALE 4POS 16.4'	5
21033712403 HARTING	CBL FMALE TO WIRE LEAD 4P 1.64'	144
21349292477250 HARTING	CBL MALE TO MALE 4POS SHLD 82'	0
21034496302 HARTING	CBL FMALE RA TO MALE RA 4P 1.97'	0
21035492301 HARTING	CBL FMALE TO WIRE LEAD 5P 4.92'	4
21349900495075 HARTING	CBL FMALE RA TO WIRE 4POS 24.6'	0
21035991506 HARTING	CBL ASSY 4POS M TO WIRE 0.3M	68
21349500477050 HARTING	CBL FMALE RA TO WIRE 4POS 16.4'	0
21348700390010 HARTING	CBL FMALE RA TO WIRE 4POS 3.28'	69
21348100489010 HARTING	CBL FMALE TO WIRE LEAD 4P 3.28'	57
21349494405100 HARTING	CBL MALE RA TO MALE RA 4P 32.8'	2
21348487491010 HARTING	CBL FMALE RA TO MALE 4POS 3.28'	20
21330101850050 HARTING	CBL MALE TO MALE 8P SHLD 16.4'	36

Circular Cable Assemblies

1. Overview

Circular Cable Assemblies are engineered interconnect solutions designed to transmit electrical signals or power through circular-shaped connectors. These assemblies combine multiple wires or cables terminated with circular connectors, ensuring reliable connectivity in demanding environments. Their importance spans across industries requiring robust, high-density, and high-performance connections, particularly in applications where space constraints and environmental resilience are critical.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Circular Push-Pull	Quick-mating design with mechanical locking	Industrial automation, medical devices
Circular Threaded	Vibration-resistant threaded coupling	Aerospace, military equipment
Waterproof Circular	IP67+ sealing against liquids and dust	Outdoor telecom equipment, underwater sensors
High-Density Circular	Miniaturized contacts for compact designs	Avionics, robotics

3. Structure and Components

A typical circular cable assembly consists of:

Conductors: Copper/aluminum for signal/power transmission
Insulation: PVC/TPE/PUR jackets for dielectric protection
Shielding: Braided copper or foil for EMI/RFI protection
Connector Housing: Metal/plastic shells with precision contacts
Retention System: Latches, threads, or bayonet couplings

Modular designs allow customization with hybrid signal/power/RF configurations.

4. Key Technical Specifications

Parameter	Importance
Current Rating (Amps)	Determines power transmission capacity
Voltage Rating (Volts)	Defines dielectric strength and safety margins
Contact Resistance (m )	Impacts signal integrity and power efficiency
Operating Temperature (-40 C to +125 C)	Ensures reliability in extreme environments
Mating Cycles (1000-10,000)	Indicates mechanical durability
IP Rating (IP65-IP68)	Defines environmental protection level

5. Application Fields

Primary industries include:

Industrial Automation: PLCs, CNC machines, robotic arms
Telecommunications: 5G base stations, fiber optic enclosures
Medical Equipment: MRI scanners, patient monitoring systems
Aerospace: Avionics, flight control systems
Transportation: Rail signaling systems, EV charging stations

Case Study: In automotive manufacturing, circular assemblies enable high-vibration resistance connections in robotic welding cells operating 24/7.

6. Leading Manufacturers and Products

Manufacturer	Representative Product
TE Connectivity	DEUTSCH DT Series circular connectors
Amphenol	CIRCULAR C Series high-density connectors
Molex	Circular Rast 55 series for industrial control
Delphi	Weatherproof automotive circular connectors

7. Selection Guidelines

Key considerations:

Electrical requirements (current/voltage profiles)
Environmental conditions (temperature, moisture, chemical exposure)
Mechanical demands (vibration, mating cycles, cable bend radius)
Space constraints (connector size and orientation)
Industry-specific certifications (e.g., MIL-STD, UL, RoHS)

Recommend verifying compatibility with existing infrastructure and performing thermal cycling tests for critical applications.

8. Industry Trends

Emerging developments include:

Miniaturization while maintaining high contact density
Integration of fiber optics and high-speed data transmission
Adoption of composite materials for weight reduction
Growing demand for waterproof connectors in outdoor IoT deployments
Standardization of hybrid power/signal interfaces in EV charging

Market forecasts predict 8.2% CAGR through 2027 driven by industrial IoT and 5G infrastructure investments.