Circular Connectors - Backshells and Cable Clamps

Part Number	Description / PDF	Quantity
A850493917W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 17 OLIVE	21
M85049/92-17T Socapex (Amphenol Pcd)	COMPOSITE STRAIN RELIEF	4
A8504938S19A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 19 BLACK	68
A8504938S21N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 21 SILVER	17
A8504952S18A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 18 BLACK	96
M85049/1811Z03 Socapex (Amphenol Pcd)	BACKSHELL STRAIGHT ENVRN-EMI/RFI	19
A8504951S14N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 14 SILVER	24
A8504939S13W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 13 OLIVE	4
A8504952S16A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 16 BLACK	77
M85049/52-1-14N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 14 SILVER	60
A850493823N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 23 SILVER	78
A8504952132W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 32 OLIVE	60
A8504952124A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 24 BLACK	56
A8504952S20A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 20 BLACK	57
M85049/69-13W Socapex (Amphenol Pcd)	CONN BACKSHELL SHRINK BOOT SZ 13	0
A8504952148A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 48 BLACK	0
A8504951116N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 16 SILVER	0
A8504951S16N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 16 SILVER	3
M85049/38-13W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 13 OLIVE	604
A8504939S9N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 9 SILVER	22

Circular Connectors - Backshells and Cable Clamps

1. Overview

Circular connectors backshells and cable clamps are critical electromechanical components that ensure secure cable termination, strain relief, and environmental protection in connector systems. Backshells provide mechanical support and shielding for cable-connector junctions, while cable clamps offer strain relief by securing cables to panels or equipment. These components are essential in maintaining signal integrity, preventing mechanical failure, and meeting industry-specific environmental standards across aerospace, industrial automation, and medical device applications.

2. Main Types and Functional Classification

Type	Function Features	Application Examples
Metal Backshells	EMI/RFI shielding, high durability, threaded coupling	Aerospace avionics systems
Plastic Backshells	Lightweight, corrosion-resistant, quick-install design	Industrial IoT sensors
360 Cable Clamps	Full-circle compression, vibration resistance	Robotics joint actuators
Split-shell Clamps	Field-installable, adjustable diameter range	Marine communication systems
EMI Shielded Clamps	Integrated conductive gaskets, grounding contacts	Military radar equipment

3. Structure and Components

Typical backshell assembly consists of: - Housing (aluminum alloy or thermoplastic) - Cable entry port with sealing ring (IP67 rated) - Strain relief mechanism (serrated clamping ring) - EMI shielding fingers (for metallic versions) - Panel mounting threads (UNF or metric) Cable clamp structure includes: - Two-part housing (upper/lower halves) - Elastomer compression sleeve - Threaded locking screws - Cable contact surface (textured for grip) - Optional grounding tab

4. Key Technical Specifications

Parameter	Value Range	Importance
Material Temperature Range	-55 C to +150 C	Operational reliability in extreme environments
IP Protection Rating	IP65-IP68	Dust/water ingress prevention
Cable Diameter Range	2-25mm	Compatibility with various cable sizes
Insertion Force	0.5-5N	Impact on field installation efficiency
Shielding Effectiveness	60-100dB	Signal integrity maintenance
Vibration Resistance	10-2000Hz, 10G	Aerospace/military compliance

5. Application Fields

Aerospace: Flight control systems, satellite communication arrays
Medical: MRI scanners, patient monitoring equipment
Industrial: CNC machine cabling, factory automation sensors
Transportation: Rail signaling systems, EV battery connectors
Defense: Tactical radio systems, weapon guidance electronics

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TE Connectivity	Duronic MS Backshell	Quick-disconnect, MIL-DTL-38999 compliant
Amphenol	Series 5000 Cable Clamp	Multi-cable capacity, IP68 rated
Molex	ToughCrimp Shielded Backshell	10G EMI shielding, vibration proof
Weidm ller	PROFIBUS Cable Clamp	Fieldbus protocol optimized design

7. Selection Recommendations

Key selection criteria include: - Environmental factors (temperature, humidity, chemical exposure) - Cable geometry (diameter, jacket material) - Mechanical requirements (vibration, pull-out force) - EMI/RFI shielding needs - Installation constraints (tool access, maintenance frequency) - Compliance standards (MIL-SPEC, IEC 60529) Example: For offshore wind turbine sensors, select stainless steel backshells with IP68 clamps and neoprene sealing to withstand saltwater corrosion and mechanical shock.

8. Industry Trends

Current development trends include: - Hybrid connectors integrating optical and electrical backshells - Additive manufacturing for custom cable clamp geometries - Smart clamps with embedded strain gauges for condition monitoring - Nano-coatings for enhanced corrosion resistance - Miniaturization for UAV and wearable medical device applications - Sustainability focus: Recyclable thermoplastic formulations