Circular Connectors - Backshells and Cable Clamps

Part Number	Description / PDF	Quantity
A850495118W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 8 OLIVE	0
A850493911A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 11 BLACK	31
A8504952118N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 18 SILVER	15
IP-UNCK23N PEI-Genesis	UNIVERSAL H/23 ELECTRO NCKL	101
RM12WBP-CP(5)(71) Hirose	CONN CABLE CLAMP SZ12 M13 SILVER	1
TXR41AB00-1610AI TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL ADPT SZ16 17 OLIV	0
M85049/38-21N	CONN CABLE CLAMP SZ 21 G SLVR	512
TXR54AB00-0804AI TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL ADPT SZ8 8S OLIVE	43
97-3057-12 Amphenol Industrial	CONN CABLE CLAMP SZ 20/22 OLIVE	53
M85049/38S13N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 13 SILVER	246
A8504952116A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 16 BLACK	23
IP-UNCC16W PEI-Genesis	UNIVERSAL 16 OLIVE DRAB CAD	114
M85049/92-21T Socapex (Amphenol Pcd)	COMPOSITE STRAIN RELIEF	25
M85049/1813W03 Socapex (Amphenol Pcd)	CONN BACKSHELL W/CLAMP SZ 13 M18	0
CIRBP20ECHSA TE Connectivity AMP Connectors	CONN BACKSHELL ADPT SZ20 BLK	5
UTG14PG Souriau-Sunbank by Eaton	CONN BACKSHELL W/CLAMP SZ 14	22
A8504939S19W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 19 OLIVE	30
M85049/49-2-14W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 14/15 OLIVE	0
M85049/51-1-20A	CONN CABLE CLAMP SZ 20 37 BLK	32
A850493917W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 17 OLIVE	21

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