Spring-cage connection

Spring-cage connection

Proven vibration resistance

Connect conductors that are vibration resistant, gas-tight, and have long-term stability – with the spring-loaded conductor contacting.

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When components are subjected to strong vibrations – in the rail industry, in wind turbine generators or in machine building – this requires maximum contact reliability. The spring-cage connection gives you a constant connection: the spring-cage always exerts the same force on the conductor, regardless of the influence of the user.

Your advantages

  • No restriction on cross sections when using conductors with ferrules
  • Low logistics costs, thanks to uniform accessories
  • Comprehensive range of accessories: standardized for bridging, testing, and marking
  • Terminal blocks with spring-cages are a part of the COMPLETE line system

Spring-loaded conductor connection

Method of operation of a spring-cage connection  

Reliable contact in a compact design

The spring-cage connection from Phoenix Contact is extremely user friendly, thanks to its front connection:

  1. Open the terminal point with a standard screwdriver.
  2. Insert the conductor into the clamping space and remove the screwdriver. The conductor makes contact automatically.

A large connection space in an extremely compact design – these are further advantages of the patented spring-cage technology. They allow you to wire conductors with a nominal cross section either with or without ferrules. You can clamp all types of copper wires up to 35 mm² without pretreatment.

Double function shaft

Terminal blocks with bridges  

Simple potential distribution with plug-in bridges

Connect up to 50 terminal blocks in just one step – with 2- to 50-pos. bridges.

And that's not all: two potentials can be routed in parallel through a terminal point in the double function shaft. Simply disconnect individual contact tabs from the standard bridge, and bridging between non-adjacent terminal blocks is established. The contact points can also be marked.

Large-surface marking

Terminal point marking  

Work efficiently thanks to a clear marking

The clear marking of the terminal points is essential for reliable and quick installation. In addition to the center marking of the terminal blocks, each terminal point can also be labeled separately.

Top quality

Components of a terminal block: metal parts and plastic parts  

High-grade metal and plastic parts

Reliable connections – that's our aim. The quality of our products is the key. This starts with the selection of materials.

Metal parts made of corrosion-free, high-grade copper alloys:

  • Good electrical conductivity
  • Low temperature rise
  • Surface protected by a lead-free, galvanic nickel or tin plating
  • Spring element made of high-strength chromium-nickel spring steel

Insulating housing made of elastic plastic with a high impact strength:

  • Recyclable, halogen-free, and UV resistant
  • Good tropical and termite resistance
  • Operating temperatures of up to 130°C
  • High chemical resistance
  • Excellent aging characteristics
  • Certification in accordance with UL 94 for flammability rating V0


586 Fulling Mill Road
Middletown, PA 17057
(800) 888-7388

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