Circular Connectors - Backshells and Cable Clamps

Part Number	Description / PDF	Quantity
R85049/88-13N03 TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL BANDING SZ 13 C	0
A8504952S36A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 36 BLACK	71
M85049/52S12W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 12 OLIVE	59
AHD18-009 Tuchel / Amphenol	CONN BACKSHELL GRAY 1 3/8-18	128
A8504951S12A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 12 BLACK	2
BTH3-15-10-1-B-SE TE Connectivity Aerospace Defense and Marine	BANDING BACKSHELL, 90 DEG	21
M85049/51-1-20W	CONN CABLE CLAMP SZ 20 37 OLIVE	19
IP-UNCC8B PEI-Genesis	UNIVERSAL 8 BLACK COBALT	1567
A850493917A Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 17 BLACK	77
ACT00WB-H-EL00N TE Connectivity DEUTSCH Connectors	S RELIEF STR	50
TXR40AB00-1810AI TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL ADPT SZ 19F OLIVE	34
A8504939S11W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 11 OLIVE	11
TR16AHC1N VEAM	CONN BACKSHELL W/CLAMP SZ 16 BLK	95
JR16WCC-10(72) Hirose	CONN CABLE CLAMP SZ 16 M20 BLACK	61
IP-UNCK11TN PEI-Genesis	UNIVERSAL B/11 NICKEL	50
M85049/52-1-22W Socapex (Amphenol Pcd)	CONN CABLE CLAMP SZ 22 OLIVE	34
R85049/88-25W02 TE Connectivity Aerospace Defense and Marine	CONN BACKSHELL BANDING SZ 25 J	0
IP-UNAB22A-PG21 PEI-Genesis	CG ADAPTER 22 BLACK PG21	187
UT0S14JC Souriau-Sunbank by Eaton	CONN BACKSHELL W/CLAMP SZ 14	0
IP-UNAA20W-PG21 PEI-Genesis	CG ADAPTER 20 OD CAD PG21	59

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