Circular Connectors

Circular Connectors - Housings

Part Number	Description / PDF	Quantity
D38999/20FJ37PE-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 37POS PNL MT	0
D38999/26KD97AN Amphenol Aerospace Operations	CONN PLUG HSNG MALE 12POS INLINE	132
D38999/24FD97AA Amphenol Aerospace Operations	CONN RCPT HSNG MALE 12POS PNL MT	9
MS27508E10B35AA Amphenol Aerospace Operations	JT 13C 13#22D PIN WALL RECP	750
D38999/20FJ4PE-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 56POS PNL MT	0
D38999/20SD97BN Amphenol Aerospace Operations	CONN RCPT HSG FMALE 12POS PNL MT	32
D38999/20KJ24AN Amphenol Aerospace Operations	CONN RCPT HSNG MALE 24POS PNL MT	0
D38999/20FA98BA Amphenol Aerospace Operations	CONN RCPT HSNG FMALE 3POS PNL MT	112
D38999/26FJ37PN-LC Amphenol Aerospace Operations	CONN PLUG HSNG MALE 37POS INLINE	279
D38999/24WJ11SC-LC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 11POS PNL MT	0
D38999/20FJ8PE-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 8POS PNL MT	0
D38999/26ZE99PB-LC Amphenol Aerospace Operations	CONN PLUG HSNG MALE 23POS INLINE	1
D38999/20ZA98PA-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 3POS PNL MT	6
D38999/20FJ37PA-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 37POS PNL MT	0
D38999/20KB99BN Amphenol Aerospace Operations	CONN RCPT HSNG FMALE 7POS PNL MT	89
D38999/26KC4BA Amphenol Aerospace Operations	CONN PLUG HSNG FMALE 4POS INLINE	35
D38999/26SD97SN-LC Amphenol Aerospace Operations	CONN PLUG HSG FMALE 12POS INLINE	43
D38999/24ZJ29SA-LC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 29POS PNL MT	0
D38999/20FJ61BE Amphenol Aerospace Operations	CONN RCPT HSG FMALE 61POS PNL MT	0
D38999/26WD35SNLC Amphenol Aerospace Operations	CONN PLG HSG FMALE 37POS INLINE	48

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