Circular Connectors - Backshells and Cable Clamps

Part Number	Description / PDF	Quantity
A8504952114A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 14 BLACK	25
A8504952S28W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 28 OLIVE	79
97-3057-1010-1(621) Amphenol Industrial	CONN CABLE CLAMP SZ18 1-20 BLACK	55
IP-UNCA22B PEI-Genesis	UNIVERSAL 22 BLACK COBALT	53
97-3057-1010(621) Amphenol Industrial	CONN CABLE CLAMP SZ 18 1-20 BLK	0
IP-UNCC24N PEI-Genesis	UNIVERSAL 24 ELECTRO NICKEL	258
M85049/52-1-8W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 8 OLIVE	66
UTG20PG Souriau-Sunbank by Eaton	CONN BACKSHELL W/CLAMP SZ20 PG21	8
TXR21AB90-0804AI2 TE Connectivity AMP Connectors	CONN BACKSHELL ADPT SZ 8 OLIVE	0
97-67-12-4 Amphenol Industrial	CONN CABLE CLAMP ADPT 5/8-24	70
AHDMBS-24-002 Tuchel / Amphenol	BACKSHELL, SIZE 24, AHDM SERIES,	47
UTG12AC Souriau-Sunbank by Eaton	CONN BACKSHELL W/CLAMP SZ 12	70
R85049/88-15Z02 TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL BAND SZ 15 D BLK	41
M85049/52-1-28W	CONN CABLE CLAMP SZ 28 OLIVE	60
A850493911N Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 11 SILVER	26
JL05-24EB3B-(13)-R JAE Electronics	CONN BACKSHELL W/CLAMP SZ 24	0
A850493913A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 13 BLACK	16
TXR40AB00-2014AI TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL ADPT SZ 21G OLIVE	1
IP-UNCA18N PEI-Genesis	UNIVERSAL 18 ELECTRO NICKEL	26
97-3057-1007(676) Amphenol Industrial	CONN CABLE CLAMP SZ 12SL/14/14S	0

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