Circular Connectors

Circular Connectors - Housings

Part Number	Description / PDF	Quantity
D38999/24WB35SNLC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 13POS PNL MT	86
D38999/20FJ4SE-LC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 56POS PNL MT	0
D38999/20WJ11BB Amphenol Aerospace Operations	CONN RCPT HSG FMALE 11POS PNL MT	0
D38999/24KD97SN-LC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 12POS PNL MT	48
D38999/24FD18SN-LC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 18POS PNL MT	357
D38999/20WE35SNLC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 55POS PNL MT	9
D38999/20WJ8PN-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 8POS PNL MT	0
D38999/20KB99SN-LC Amphenol Aerospace Operations	CONN RCPT HSNG FMALE 7POS PNL MT	89
D38999/20FA98PA-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 3POS PNL MNT	112
D38999/26FC8PA-LC Amphenol Aerospace Operations	CONN PLUG HSNG MALE 8POS INLINE	267
D38999/20WJ37PN-LC Amphenol Aerospace Operations	CONN RCPT HSNG MALE 37POS PNL MT	0
D38999/26KB99BN Amphenol Aerospace Operations	CONN PLUG HSNG FMALE 7POS INLINE	89
D38999/20KD97AN Amphenol Aerospace Operations	CONN RCPT HSNG MALE 12POS PNL MT	79
D38999/24FD5AA Amphenol Aerospace Operations	CONN RCPT HSNG MALE 5POS PNL MNT	9
D38999/26FJ24PN-LC Amphenol Aerospace Operations	CONN PLUG HSG MALE 24POS INLINE	194
D38999/26SA98PN-LC Amphenol Aerospace Operations	CONN PLUG HSNG MALE 3POS INLINE	102
D38999/26KB5BB Amphenol Aerospace Operations	CONN PLUG HSNG FMALE 5POS INLINE	67
D38999/24WE35SNLC Amphenol Aerospace Operations	CONN RCPT HSG FMALE 55POS PNL MT	44
D38999/26FJ20SA-LC Amphenol Aerospace Operations	CONN PLG HSG FMALE 30POS INLINE	124
D38999/26SD97BN Amphenol Aerospace Operations	CONN PLUG HSG FMALE 12POS INLINE	43

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