Circular Cable Assemblies

Part Number	Description / PDF	Quantity
RST 4-RKWT 4-225/1M Lumberg Automation	CBL FMALE RA TO MALE 4POS 3.28'	18
RK 50-877/3M Lumberg Automation	CBL FMALE TO WIRE LEAD 5P 9.84'	20
511000374 Lumberg Automation	RKFP 4-3/4NPT-803/3M	5
900016029 Lumberg Automation	0985 856 100/1M	6
RST 4-RKT 4-225/2M Lumberg Automation	CBL FMALE TO MALE 4POS 6.56'	0
511000083 Lumberg Automation	RSWP 4-RKWP 4-803/10M	5
934851040 Lumberg Automation	RSTS 4S-700/5 M	20
511000013 Lumberg Automation	RSP 4-RKP 4-803/8M	3
934851042 Lumberg Automation	RSTS 4S-700/15 M	7
RKWT 5-612/10M Lumberg Automation	CBL FMALE RA TO WIRE 5POS 32.8'	13
934849004 Lumberg Automation	RKT 4S-703/15 M	5
RKT 5-228/2M Lumberg Automation	CBL FMALE TO WIRE LEAD 5P 6.56'	30
500003393 Lumberg Automation	RSRK 100M-S4677/10M	0
600002437 Lumberg Automation	ASB 2-RKT 4-3-610/0.3M	0
900000316 Lumberg Automation	0975 254 103/5 M	0
600003432 Lumberg Automation	RKWT 3 U-688/30F	0
934753039 Lumberg Automation	WRST 4-WRKWT/LED P 4-521/2 M	0
500004038 Lumberg Automation	RSRK 120M-776/2M	0
500001332 Lumberg Automation	RK 30-645/2M	0
500002430 Lumberg Automation	RKF 120M-676/2F	0

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.