318EIA-HCA495-001
3-1/8" EIA Connector for 5" Coaxial Cable, Gas stop, Sealing compound

Name: 3-1/8" EIA Connector for 5" Coaxial Cable, Gas stop, Sealing compound
SKU: 318EIA-HCA495-001

Rev : B | Rev date : 10 Apr 2026

Radio Frequency Systems line of high performance HELIFLEX® coaxial cable connectors are characterized by excellent gas tightness and extremely low losses. HELIFLEX®Lite connectors can be installed with basic hand tools, but the use of dedicated installation tools further facilitates ease of assembly and improves performance.
RFS connectors are fully tested for mechanical and electrical compliance specifications.
HELIFLEX®Lite premium connectors have excellent electrical values and provide outstanding performance for the most demanding applications. The RFS connector design provides maximum sealing integrity and gas tightness.

Features / Benefits

Lightweight
Excellent gas tightness, Overpressure for increased voltage handling is maintained throughout the system.
Robust Mechanical Design, Superior and consistent performance guarantees outstanding system characteristics.
Extremely low reflection factor, Outstanding low reflection factor improves overall system performance and margin and reduces mismatch losses
Totally Waterproof according to IP 66 / 68, Assures safe, long term operation in the harshest of environments. System tightness doesn't have to rely on overpressure from dehydration equipment.
Easy to install, no special tools needed. Only basic hand tools required. No additional cost to the installer.
RoHs (EU) and CRoHs (China) compliant, can be used on a global basis.

Structure

Cable Type

Air Dielectric

Cable Size

Model Series

HCA495-50 Series

Connector Interface Size

3-1/8" EIA

Mechanical Specifications

Connector Length

245mm (9.646in)

Connector Outer Diameter

177mm (6.968in)

Sealing Volume

120cm³ (4.058ounces)

Inner Conductor Material / Coating

Copper-alloy / Silver

Outer Conductor Material / Coating

Copper-alloy / Silver

Sealing Volume

120cm³ (4.058ounces)

Sealing Method

Sealing compound ¹ )

Electrical Specifications

Nominal Impedance

50 Ω

Connector Frequency Range

0 - 0.86 GHz

Frequency Range	VSWR	Return Loss
DC - 860MHz	1.02	40

Testing and Environmental

Ingress Protection (IP) Rating

IP68

Note

To join two cables with EIA connectors, two identical socket connectors are installed on either end of the cables to be joined, and a coupling element is used to make the connection of the center conductor.
The coupling element must be ordered separately.
¹) The sealing compound must be ordered separately.