DIN rail terminal blocks

A DIN rail is a metal rail of a standard type widely used for mounting circuit breakers and industrial control equipment inside equipment racks. DIN Rail Terminals are used in a wide range of applications including machinery, automotive industry, railway and process engineering. Here is a collection of videos on

DIN Rail Terminals:

What are DIN Rail Terminal Blocks? Types and Explanation!

WAGO short circuit terminal block test


Terminal Block Basics

Weidmuller Push-In Type Terminal Blocks P-Series

Weidmuller Screw Type Terminal Blocks W-Series


  1. Tomi Engdahl says:

    Types of Terminal Block Connections

    Different Types of Connections on Terminal Blocks presented by Katie Rydzewski for Galco TV.

  2. Tomi Engdahl says:

    Terminal Block Connection Types

    Weidmuller Push-In Type Terminal Blocks P-Series

  3. Tomi Engdahl says:

    The DIN Rail and How It Got That Way

    Unless you’ve spent some time in the industrial electrical field, you might be surprised at the degree of integration involved in the various control panels needed to run factories and the like. Look inside any cabinet almost anywhere in the world, and you’ll be greeted by rows of neat plastic terminal blocks, circuit breakers, signal conditioners, and all manner of computing hardware from programmable logic controllers right on to Raspberry Pis and Arduinos.

    A well-crafted industrial control panel can truly be a thing of beauty. But behind all the electrical bits in the cabinet, underneath all the neatly routed and clearly labeled wires, there’s a humble strip of metal that stitches it all together: the DIN rail. How did it come to be, and why is it so ubiquitous?

  4. Tomi Engdahl says:

    DIN rail

    A DIN rail is a metal rail of a standard type widely used for mounting circuit breakers and industrial control equipment inside equipment racks. These products are typically made from cold rolled carbon steel sheet with a zinc-plated or chromated bright surface finish. Although metallic, they are meant only for mechanical support, and are not used as a busbar to conduct electric current, although they may provide a chassis grounding connection.

  5. Tomi Engdahl says:

    DIN rail basics

    If you deal with electrical installations for industrial control applications, no doubt you have heard the term DIN rail or have used DIN rail in your installations. Perhaps you have even read an article or two regarding some of the products that mount on DIN rail, such as terminal blocks or contactors. While much time has been spent educating customers on DIN rail mountable products, very little time has been spent on the backbone of this system, DIN rail itself. By gaining a valuable understanding of DIN rail applications in a control environment, such as materials available, options, and foot prints, new and long time users of DIN rail can better utilize this industry standard.

    DIN rail is available in various base metals of which, the most common are steel, aluminum, stainless-steel and copper. In addition, DIN rail is available in various finishes with respect to the base metal. The most common base metal and finish combination in the industry is zinc plated, yellow chromated steel.

    When selecting a DIN rail with specific metal composition, several factors must be considered; enclosure/control cabinet material, environment (usually already determined with the selection of enclosure material), products to be mounted and short circuit requirements for grounding. For example, if you have selected an aluminum enclosure, an aluminum DIN rail should be selected.

    If mounting heavy components, such as large PLC’s, steel rail is the best bet due to its strength and durability.

    TS-35 (35 mm wide rail) is the industry standard. Most existing and new designs of DIN rail mountable components incorporate this footprint. The TS-35 is available in two profiles, (1) “The Standard” which is 7.5mm in height and, (2) “The High Hat” which is 15 mm in height. The 7.5mm high rail is suitable for the majority of applications and is the most cost effective of the two. However, when mounting heavy components such as large PLC’s, transformers, contactors, drives, power supplies, etc.. the 15mm high rail provides the added strength and durability required.

    DIN rail is also available with or without mounting slots. Pre-manufactured mounting slots come in two different configuration, standard (6.3 x 18mm slots) or long slots (5.2 x 25mm slots).

    With the use of a DIN rail ground (protective conductor) terminal block, the DIN rail itself can be used as the grounding busbar.
    When using DIN rail as a ground busbar, particular attention must be paid to the short circuit properties of the rail.

    As you can see by now, there is more thought required to specifying DIN rail than asking, “Do my components fit on this rail?”

  6. Tomi Engdahl says:

    When will UK sockets have WAGO style connectors? – electricians comment


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