Circular Connectors - Backshells and Cable Clamps

Part Number	Description / PDF	Quantity
R85049/88-19N02 TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL BANDING SZ 19 F	22
M85049/1811Z03 Socapex (Amphenol Pcd)	BACKSHELL STRAIGHT ENVRN-EMI/RFI	19
A8504951S14N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 14 SILVER	24
TXR40AB90-1005AI TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL ADPT SZ 11B OLIVE	0
T 3102 0057 X Tuchel / Amphenol	CONN BACKSHELL PG13.5 BLACK 10PC	0
CIRBP20SCHSA TE Connectivity AMP Connectors	CONN BACKSHELL ADPT SZ20 BLK	0
UT012JCS Souriau-Sunbank by Eaton	CONN BACKSHELL W/CLAMP SZ12 PG11	16
A8504939S13W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 13 OLIVE	4
A8504952S16A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 16 BLACK	77
UT018AC Souriau-Sunbank by Eaton	CONN BACKSHELL W/CLAMP SZ 18	21
IP-UNAK17N-PG16 PEI-Genesis	CG ADAPTER E/17 NICKEL PG16	86
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
1445730-1 TE Connectivity AMP Connectors	CONN BACKSHELL W/CLAMP SZ8 BLACK	735
209M410-19B TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL ADPT SZ 11B OLIVE	156
A8504952132W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 32 OLIVE	60
M85049/38S21N	CONN CABLE CLAMP SZ 21 G SLVR	539
TXR40AB90-1412AI TE Connectivity Raychem Cable Protection	CONN BACKSHELL ADPT SZ 15D OLIVE	0
97-3057-12-6 Amphenol Industrial	CONN CABLE CLAMP SZ 20/22 OLIVE	64
M85049/52-1-16A	CONN CABLE CLAMP SZ 16 19 BLK	23

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