Circular Connectors

Circular Connectors - Housings

Part Number	Description / PDF	Quantity
1811901-7 TE Connectivity Aerospace Defense and Marine	CONN RCPT HSG F/M 4POS PANEL MNT	352
1811902-7 TE Connectivity Aerospace Defense and Marine	CONN PLUG HSG F/M 4POS INLINE	49
1811928-8 TE Connectivity Aerospace Defense and Marine	8Q8 SIZE 25 PLUG KIT,A KEY	0
1877774-7 TE Connectivity Aerospace Defense and Marine	H7RECEPT ASSY, SZ 17, N KEY, NO	0
1954577-1 TE Connectivity Aerospace Defense and Marine	QUADRAX SZ 23 RCPT ASS'Y 6Q6, EN	0
1954577-3 TE Connectivity Aerospace Defense and Marine	QUADRAX SZ 23 RCPT ASS'Y 6Q6, EN	0
1-1811902-7 TE Connectivity Aerospace Defense and Marine	PLUG, OD ,N KEY,SZ 19 FREE HANGI	0
MC8016-F-11-02SN TE Connectivity Aerospace Defense and Marine	ARINC 801, 38999 STYLE, SIZE 11-	0
1-1954354-3 TE Connectivity Aerospace Defense and Marine	CIRC QUAD SZ 21, PLUG, N KEY, OL	0
MC8016-F-11-02SB TE Connectivity Aerospace Defense and Marine	ARINC 801, 38999 STYLE, SIZE 11-	0
MC8010-F-11-02N TE Connectivity Aerospace Defense and Marine	ARINC 801, 38999 STYLE, SIZE 11-	0
MC8010-F-17-08PN TE Connectivity Aerospace Defense and Marine	ARINC 801, 38999 STYLE, SIZE 17-	0
1877384-8 TE Connectivity Aerospace Defense and Marine	CIRCULAR QUAD PLUG SZ9 1Q1 A	0
MC8016-F-13-04SN TE Connectivity Aerospace Defense and Marine	ARINC 801, 38999 STYLE, SIZE 13-	0
1877384-9 TE Connectivity Aerospace Defense and Marine	CIRCULAR QUAD PLUG SZ9 1Q1 B	0
1-1877775-0 TE Connectivity Aerospace Defense and Marine	CIRCULAR QUAD,SZ17,2Q2,PLUG,OD,N	0
MC8017-F-13-04PN TE Connectivity Aerospace Defense and Marine	ARINC 801, TYPE 1 JAM NUT CONNEC	0
1811928-9 TE Connectivity Aerospace Defense and Marine	8Q8 SIZE 25 PLUG KIT,B KEY	0
1811928-7 TE Connectivity Aerospace Defense and Marine	8Q8 SIZE 25 PLUG KIT,N KEY	0
MC8010-F-21-16-PN TE Connectivity Aerospace Defense and Marine	ARINC 801, REC	0

Circular Connectors - Housings

1. Overview

Circular connectors housings are electromechanical devices designed to protect and organize electrical contacts in circular configurations. They serve as mechanical support structures while providing environmental protection, electrical insulation, and strain relief. These housings are critical components in maintaining signal integrity and power transmission across diverse applications, from industrial automation to aerospace systems.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Metal Housings	High durability, EMI/RFI shielding, vibration resistance	Military equipment, aerospace systems
Plastic Housings	Lightweight, corrosion-resistant, cost-effective	Consumer electronics, medical devices
Hybrid Housings	Combination of metal/plastic for optimized performance	Automotive sensors, industrial machinery
High-Density Housings	Miniaturized contact arrangements with advanced insulation	Telecom equipment, data centers

3. Structure and Components

Typical circular connector housings consist of: - Shell Body: Cylindrical main structure (metal/plastic) with mounting threads - Contact Cavities: Precision-machined compartments for terminal placement - Sealing System: Integrated gaskets/O-rings for IP65+ protection - Polarization Key: Mechanical feature preventing misalignment - Retention System: Threaded coupling or bayonet mechanisms - Cable Entry: Strain relief provisions with gland seals

4. Key Technical Specifications

Parameter	Importance
Current Rating (A)	Determines power transmission capacity
Voltage Withstand (V)	Ensures dielectric strength
Operating Temperature (-40 C to +125 C)	Defines environmental tolerance
Vibration Resistance (10-2000Hz)	Crucial for harsh environments
IP Rating (IP67/IP68)	Specifies ingress protection level
Contact Retention Force	Prevents accidental disconnection

5. Application Fields

Industrial Automation: Robotics, PLC systems
Medical Equipment: MRI machines, patient monitoring systems
Aerospace: Avionics, flight control systems
Telecommunications: 5G base stations, fiber optic equipment
Energy: Wind turbines, solar inverters

6. Leading Manufacturers and Products

Manufacturer	Representative Product
TE Connectivity	DEUTSCH DT series metal housings
Amphenol	Hermetic circular connector enclosures
Molex	T1 Mini sealed automotive housings
Phoenix Contact	Heavy-duty QUICKON connectors

7. Selection Guidelines

Key considerations include: - Environmental factors (temperature, moisture, chemicals) - Mechanical requirements (vibration, shock, mating cycles) - Electrical parameters (current/voltage requirements) - Material compatibility (corrosion resistance needs) - Space constraints and mounting options - Cost vs. performance trade-offs Example: For underwater robotics applications, prioritize IP68-rated plastic housings with corrosion-resistant coatings and pressure sealing.

8. Industry Trends

Current development trends include: - Miniaturization for IoT device integration - Advanced polymer composites for weight reduction - Integrated smart sensors in connector housings - Enhanced EMI shielding for 5G applications - Sustainability focus on recyclable materials - Additive manufacturing enabling complex geometries