DIN rail

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

Electrical equipment is mounted onto 35 mm DIN rail

A DIN rail or top-hat rail is a standardized 35 mm wide metal rail with hat-shaped cross section. It is widely used for mounting circuit breakers and industrial control equipment inside equipment racks.

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 been standardized:

• Miniature top-hat rail, 15 mm x 5.5 mm (EN 50045, BS 6273, DIN 46277-2);
• 7.5 mm wide top-hat rail (EN 50023, BS 5585);
• G-type rail (EN 50035, BS 5825, DIN 46277-1).

References

• European Standard EN 50022: Specification for low voltage switchgear and controlgear for industrial use. Mounting rails. Top hat rails 35 mm wide for snap-on mounting of equipment. (formerly: German Standard DIN 46277, British Standard BS 5584)

• IEC International Standard 60715: Dimensions of low-voltage switchgear and controlgear. Standardised mounting on rails for mechanical support of electrical devices in switchgear and controlgear installations.