Circular Cable Assemblies

Image	Part Number	Description / PDF	Quantity	Rfq
	900004186 Lumberg Automation	0985 806 124/5M	0
	900016144 Lumberg Automation	0985 707 100/7M	0
	934753035 Lumberg Automation	WRST 4-WRKWT/LED F 4-521/10 M	0
	934735023 Lumberg Automation	WRST 8-523/20 M	0
	500004066 Lumberg Automation	RKF 30-638/50F	0
	900001719 Lumberg Automation	0935 613 303/3M	0
	511000576 Lumberg Automation	RKWP 3-800/35M	0
	934737068 Lumberg Automation	WRSMV 4-WRKMWV 4-521/1 M	0
	900004605 Lumberg Automation	0985 806 125/85M	0
	900002606 Lumberg Automation	0985 707 101/5M	0
	934729004 Lumberg Automation	WRKMV 3-520/15 M	0
	511000863 Lumberg Automation	RSP 3-RKWPA 3-802/10M	0
	64548 Lumberg Automation	RST 8-RKT 8-282/0,3 M	0
	500002675 Lumberg Automation	RS 30-731/30F	0
	511000235 Lumberg Automation	RSWPA 4-RKPA 4-805/1M	0
	500001599 Lumberg Automation	RSRKW 301-619/12F	0
	900004616 Lumberg Automation	0985 806-U 100/8M	0
	900004918 Lumberg Automation	0935 660 302/5M	0
	511000835 Lumberg Automation	RSP 3-RKPA 3-802/3M	0
	700000426 Lumberg Automation	RSMV 3-RKWT/LED A 4-3-224/1 M	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.