Circular Cable Assemblies

Part Number	Description / PDF	Quantity
RST 5L-RKT 5L-949/0,3 M Lumberg Automation	CBL FMALE TO MALE 5P SHLD 300MM	7
RST 4-RKT 4-633/1M Lumberg Automation	CBL FMALE TO MALE 4POS 3.28'	8
RST 4-RKT 4-633/2M Lumberg Automation	CBL FMALE TO MALE 4POS 6.56'	28
RSRK 50-877/10M Lumberg Automation	CBL FMALE TO MALE 5POS 32.8'	7
RST 4-RKWT 4-633/2M Lumberg Automation	CBL FMALE RA TO MALE 4POS 6.56'	3
RSRK 40-839/0.5M Lumberg Automation	CBL FMALE TO MALE 4POS 1.64'	4
RSRK 40-839/15M Lumberg Automation	CBL FMALE TO MALE 4POS 49.2'	5
RSRK 40-839/10M Lumberg Automation	CBL FMALE TO MALE 4POS 32.8'	5
900016055 Lumberg Automation	0985 856 102/20M	3
RKW 30-838/3M Lumberg Automation	CBL FMALE RA TO WIRE 3POS 9.84'	20
RSRK 50-877/20M Lumberg Automation	CBL FMALE TO MALE 5POS 65.6'	4
0985 YM57530 100/1M Lumberg Automation	CBL MALE TO MALE 4POS SHLD 3.28'	61
511000584 Lumberg Automation	RSPA 3-RKPA 3-802/2.5M	0
RKW 40-839/4M Lumberg Automation	CBL FMALE RA TO WIRE 4POS 13.12'	8
RK 50-877/4M Lumberg Automation	CBL FMALE TO WIRE LEAD 5P 13.12'	10
RST 4-RKWT 4-633/1M Lumberg Automation	CBL FMALE RA TO MALE 4POS 3.28'	19
511000010 Lumberg Automation	RSP 4-RKP 4-803/4M	20
RST 5-RKT 5-228/1M Lumberg Automation	CBL FMALE TO MALE 5POS 3.28'	0
511000372 Lumberg Automation	RKFP 4-3/4NPT-803/0.5M	5
0985 YM57530 100/2M Lumberg Automation	CBL MALE TO MALE 4POS SHLD 6.56'	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.