Circular Connectors

Circular Connectors - Housings

Part Number	Description / PDF	Quantity
D38999/26FJ24AA Amphenol Aerospace Operations	CONN PLUG HSG MALE 24POS INLINE	124
D38999/26FE35BA Amphenol Aerospace Operations	CONN PLG HSG FMALE 55POS INLINE	102
MS27505E13B98P-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 10POS PNL MT	16
D38999/20WB35SNLC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 13POS PNL MT	19
D38999/20FJ61PE-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 61POS PNL MT	0
D38999/26WD19SNLC Amphenol Aerospace Operations	CONN PLG HSG FMALE 19POS INLINE	94
D38999/20WD15BN Amphenol Aerospace Operations	CONN RCPT HSG FMALE 15POS PNL MT	150
D38999/26FC98BA Amphenol Aerospace Operations	CONN PLG HSG FMALE 10POS INLINE	267
D38999/24ZJ37AN Amphenol Aerospace Operations	CONN RCPT HSNG MALE 37POS PNL MT	0
D38999/26WC98SNLC Amphenol Aerospace Operations	CONN PLG HSG FMALE 10POS INLINE	72
D38999/24KD97BN Amphenol Aerospace Operations	CONN RCPT HSG FMALE 12POS PNL MT	48
D38999/26FJ24AN Amphenol Aerospace Operations	CONN PLUG HSG MALE 24POS INLINE	194
D38999/20KE35AA Amphenol Aerospace Operations	CONN RCPT HSNG MALE 55POS PNL MT	7
D38999/26SA35BN Amphenol Aerospace Operations	CONN PLUG HSNG FMALE 6POS INLINE	102
D38999/26KJ24PN-LC Amphenol Aerospace Operations	CONN PLUG HSNG MALE 24POS INLINE	87
D38999/26KJ61BN Amphenol Aerospace Operations	CONN PLUG HSG FMALE 61POS INLINE	18
D38999/24WJ43PC-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 43POS PNL MT	0
D38999/20KD97BN Amphenol Aerospace Operations	CONN RCPT HSG FMALE 12POS PNL MT	48
D38999/20WJ37PB-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 37POS PNL MT	0
D38999/24FD15BA Amphenol Aerospace Operations	CONN RCPT HSG FMALE 15POS PNL MT	9

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