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DIN rail

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35 mm DIN rail with mounted circuit breaker (rear view)

Electrical equipment is mounted onto 35 mm DIN rail

Cross section view of a G-type DIN rail, with electrical equipment mounted on

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 and chromated bright surface finish. The term derives from the original specifications published by Deutsches Institut für Normung (DIN) in Germany, which have since been adopted as European (EN) and international (ISO) standards.

Contents

  [hide] 

• 1 Types
  • 1.1 Top hat rail EN 50022
  • 1.2 C section
  • 1.3 G section
• 2 Others
• 3 See also
• 4 External links

Types[edit source | editbeta]

There are three major types of DIN rail:

• Top hat section, type O, or type Ω, with hat-shaped cross section.
• C section
• G section

Top hat rail EN 50022[edit source | editbeta]

This 35-mm wide rail is widely used to mount circuit breakers. The EN 50022 standard specifies both a 7.5 mm (shown above) and a 15 mm high version, which are officially designated

• top hat rail EN 50022 – 35 × 7.5
• top hat rail EN 50022 – 35 × 15

Some manufacturers catalogues also use the terms Top hat section / Type O / Type Omega (Ω).^{[citation needed]}

C section[edit source | editbeta]

These rail are symmetrical within the tolerances given. There are four popular C section rail, C20, C30, C40 and C50. The number suffix corresponds to the overall vertical length of the rail.

G section[edit source | editbeta]

G-type rail (according to EN 50035, BS 5825, DIN 46277-1).

Others[edit source | editbeta]

In addition to the popular 35 mm x 7.5 mm top-hat rail (EN 50022, BS 5584, DIN 46277-3), several less widely used types of mounting rails have also been standardized:

• Miniature top-hat rail, 15 mm x 5.5 mm (EN 50045, BS 6273, DIN 46277-2);
• 75 mm wide top-hat rail (EN 50023, BS 5585);