Circular Connectors

Image	Part Number	Description / PDF	Quantity	Rfq
	MS27656T13B8P Amphenol Aerospace Operations	CONN RCPT MALE 8POS GOLD CRIMP	0
	MS27508E14B15PA Amphenol Aerospace Operations	CONN RCPT MALE 15POS GOLD CRIMP	0
	D38999/24MH35PN Amphenol Aerospace Operations	CONN RCPT MALE 100POS GOLD CRIMP	0
	MS27508E22F21SA Amphenol Aerospace Operations	CONN RCPT FMALE 21POS GOLD CRIMP	0
	M83723/75A1610N Amphenol Aerospace Operations	CONN PLUG FMALE 10POS GOLD CRIMP	0
	D38999/24WH55SN Amphenol Aerospace Operations	CONN RCPT FMALE 55POS GOLD CRIMP	0
	MS27484T12B4P Amphenol Aerospace Operations	CONN PLUG MALE 4POS GOLD CRIMP	0
	MS27473T14B35SA Amphenol Aerospace Operations	CONN PLUG FMALE 37POS GOLD CRIMP	0
	M83723/73W2025N Amphenol Aerospace Operations	CONN RCPT FMALE 25POS GOLD CRIMP	0
	D38999/20ZE8PN Amphenol Aerospace Operations	CONN RCPT MALE 8POS GOLD CRIMP	0
	MS27466T15B35S Amphenol Aerospace Operations	CONN RCPT FMALE 37POS GOLD CRIMP	0
	MS3474L14-15SZ Amphenol Aerospace Operations	CONN RCPT FMALE 15POS GOLD CRIMP	0
	MS27473T14B5S Amphenol Aerospace Operations	CONN PLUG FMALE 5POS GOLD CRIMP	0
	M83723/77R2232N Amphenol Aerospace Operations	CONN PLUG FMALE 32POS GOLD CRIMP	0
	MS3470L12-10PZ Amphenol Aerospace Operations	CONN RCPT MALE 10POS GOLD CRIMP	0
	MS3474W22-21SY Amphenol Aerospace Operations	CONN RCPT FMALE 21POS GOLD CRIMP	0
	M83723/71W18146 Amphenol Aerospace Operations	CONN RCPT FMALE 14POS GOLD CRIMP	0
	MS3470L18-11P Amphenol Aerospace Operations	CONN RCPT MALE 11POS GOLD CRIMP	0
	D38999/24SH21PN Amphenol Aerospace Operations	CONN RCPT MALE 21POS GOLD CRIMP	0
	M83723/77R16107 Amphenol Aerospace Operations	CONN PLUG FMALE 10POS 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