Circular Connectors

Part Number	Description / PDF	Quantity
BCC02HC Balluff	CONN PLUG FMALE 3POS IDC	75
BCC06ZY Balluff	CONN PLUG FMALE 4POS IDC	145
BCC086A Balluff	CONN RCPT MALE 5POS SCREW	34
BCC09JP Balluff	CONN PLUG FMALE 5POS SCREW	16
BCC06Y8 Balluff	CONN PLUG FMALE 4POS SCREW	99
BCC06ZC Balluff	CONN RCPT MALE 4POS SCREW	195
BCC0714 Balluff	CONN RCPT MALE 5POS SCREW	50
BCC00UP Balluff	CONN PLUG FMALE 8POS SOLDER	20
BCC0706 Balluff	CONN PLUG FMALE 4POS SCREW	74
BCC0ATC Balluff	CONN RCPT MALE 3POS SCREW	34
BCC08C0 Balluff	CONN RCPT MALE 4POS IDC	381
BCC06Z7 Balluff	CONN RCPT MALE 4POS SCREW	26
BCC0709 Balluff	CONN RCPT MALE 4POS SCREW	140
BCC06M4 Balluff	CONN RCPT MALE 4POS SCREW	801
BCC06ZK Balluff	CONN RCPT MALE 5POS SCREW	34
BCC02HE Balluff	CONN RCPT MALE 3POS IDC	966
BCC070A Balluff	CONN RCPT MALE 4POS SCREW	74
BCC02H7 Balluff	CONN RCPT MALE 4POS IDC	19
BCC03WZ Balluff	CONN RCPT MALE 4POS SCREW	0
BCC0ATA Balluff	CONN PLUG FMALE 3POS SCREW	6

Circular Connectors

1. Overview

Circular connectors are multi-pin electrical connectors with circular contact arrangements, designed for reliable signal/power transmission in harsh environments. They feature robust mechanical structures, environmental sealing, and high mating durability. These connectors are critical in aerospace, industrial automation, and medical equipment where vibration resistance and signal integrity are paramount.

2. Main Types & Functional Classification

Type	Functional Characteristics	Application Examples
MIL-DTL-38999	High-density, threaded coupling, EMI shielding	Aerospace systems, military vehicles
USB Type-C	Reversible design, 10Gbps data rate, 100W power delivery	Smartphones, laptops, PDAs
BNC	Bayonet locking, 2GHz frequency range	Test equipment, video systems
LVDT Circular	Linear variable differential transformer integration	Industrial sensors, robotics

3. Structure & Components

Typical construction includes: - Shell: Aluminum alloy/zinc die-cast housing with corrosion-resistant plating - Contacts: Gold-plated phosphor bronze with 0.5-2.0mm diameter - Insulation: High-temperature thermoplastic (200 C rating) - Sealing: IP67/IP68 rated elastomer gaskets - Mounting: Threaded/flange/clamp mechanisms

4. Key Technical Parameters

Parameter	Typical Range	Importance
Voltage Rating	50V-600V	Determines power transmission capacity
Current Rating	1A-25A/contact	Affects thermal performance
Contact Resistance	5m	Impacts signal integrity
IP Rating	IP40-IP68	Defines environmental protection level
Operating Temp	-65 C to +200 C	Material stability indicator
Mating Cycles	500-10,000	Service life predictor

5. Application Fields

Aerospace: Flight control systems, satellite antennas
Industrial: CNC machines, automated guided vehicles
Medical: MRI scanners, patient monitoring systems
Telecom: 5G base stations, fiber optic networks
Consumer: VR headsets, gaming peripherals

6. Leading Manufacturers

Manufacturer	Key Products	Special Features
Amphenol	MIL-DTL-38999 series	Composite materials, EMI filtering
TE Connectivity	DEUTSCH D38999	Thermoplastic housing, 2000V dielectric
Molex	USB Type-C 10Gbps	Shielded twinax design
Delphi	Automotive circular connectors	IP69K rating for EV charging
Lemo	Push-pull circular series	Subminiature, 5000+ mating cycles

7. Selection Guidelines

Key considerations: 1. Environmental factors: Temperature extremes, fluid exposure 2. Electrical requirements: Signal type (analog/digital), current load 3. Mechanical constraints: Panel space, mating force limitations 4. Compliance standards: MIL-STD, ISO 6722, RoHS 5. Cost vs. longevity: High-cycle applications justify premium connectors

8. Industry Trends

Emerging developments include: - Miniaturization: 1.0mm contact pitch enabling wearable devices - High-speed transmission: 25Gbps+ differential pairs for industrial IoT - Smart connectors: Integrated sensors for condition monitoring - Material innovation: Graphene-coated contacts reducing resistance - Eco-design: Halogen-free thermoplastics meeting REACH regulations