Circular Connectors

Image	Part Number	Description / PDF	Quantity	Rfq
	MS3475W16-8PY Amphenol Aerospace Operations	CONN PLUG MALE 8POS GOLD CRIMP	0
	MS3450L24-11PX Amphenol Aerospace Operations	CONN RCPT MALE 9POS GOLD CRIMP	0
	MS27484T12B35S Amphenol Aerospace Operations	CONN PLUG FMALE 22POS GOLD CRIMP	0
	MS3474L20-39SW Amphenol Aerospace Operations	CONN RCPT FMALE 39POS GOLD CRIMP	0
	MS27484T12F35PA Amphenol Aerospace Operations	CONN PLUG MALE 22POS GOLD CRIMP	0
	MS27473T12F98PA Amphenol Aerospace Operations	CONN PLUG MALE 10POS GOLD CRIMP	0
	D38999/24FD5PA Amphenol Aerospace Operations	CONN RCPT MALE 5POS GOLD CRIMP	0
	MS3475L24-61SY Amphenol Aerospace Operations	CONN PLUG FMALE 61POS GOLD CRIMP	0
	D38999/20WB5SA Amphenol Aerospace Operations	CONN RCPT FMALE 5POS GOLD CRIMP	0
	MS3472L20-41PY Amphenol Aerospace Operations	CONN RCPT MALE 41POS GOLD CRIMP	0
	MS3475L20-16SZ Amphenol Aerospace Operations	CONN PLUG FMALE 16POS GOLD CRIMP	0
	MS3471W14-12P Amphenol Aerospace Operations	CONN RCPT MALE 12POS GOLD CRIMP	0
	MS3475L10-6SW Amphenol Aerospace Operations	CONN PLUG FMALE 6POS GOLD CRIMP	0
	D38999/24WD15SC Amphenol Aerospace Operations	CONN RCPT FMALE 15POS GOLD CRIMP	0
	MS27472T22F21S Amphenol Aerospace Operations	CONN RCPT FMALE 21POS GOLD CRIMP	0
	MS27474T22F21P Amphenol Aerospace Operations	CONN RCPT MALE 21POS GOLD CRIMP	0
	MS27508E24B4P Amphenol Aerospace Operations	CONN RCPT MALE 56POS GOLD CRIMP	0
	M83723/71W2461N Amphenol Aerospace Operations	CONN RCPT FMALE 61POS GOLD CRIMP	0
	M83723/74R16247 Amphenol Aerospace Operations	CONN RCPT MALE 24POS GOLD CRIMP	0
	MS27508E10B35PA Amphenol Aerospace Operations	CONN RCPT MALE 13POS GOLD CRIMP	0

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