Circular Connectors - Backshells and Cable Clamps

Part Number	Description / PDF	Quantity
M85049/52-1-22W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 22 OLIVE	34
A8504951S12W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 12 OLIVE	9
A8504952132N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 32 SILVER	70
A8504939S15N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 15 SILVER	0
A8504952140A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 40 BLACK	98
A850493913N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 13 SILVER	7
M85049/60-1Z16 Socapex (Amphenol Pcd)	BACKSHELL STRAIGHT SHRINK BOOT 2	5
A8504952S22N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 22 SILVER	2
A85049389A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 9 BLACK	30
M85049/92-25T Socapex (Amphenol Pcd)	COMPOSITE STRAIN RELIEF	25
M85049/49-2-16W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 16/17 OLIVE	0
M85049/14S15N Socapex (Amphenol Pcd)	CONN BACKSHELL E NUT SZ 15 M22	316
A8504951116A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 16 BLACK	5
M85049/69-15W Socapex (Amphenol Pcd)	CONN BACKSHELL SHRINK BOOT SZ 15	0
A8504951S22A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 22 BLACK	0
A8504938S15A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 15 BLACK	19
A8504952S20N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 20 SILVER	28
A8504952120A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 20 BLACK	25
A8504939S13N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 13 SILVER	59
A8504952144A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 44 BLACK	120

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