Introduction

A rotary switch is an electrical switch that is operated by rotating the switch shaft. It can be used for a variety of purposes and is a popular device in both domestic and commercial applications. Rotary switches are available in configurations and sizes to suit any application. In this article, we take a look at the RTAP36205B05SD25S - a type of rotary switch - and explain its application field and working principle.

Application Field

The RTAP36205B05SD25S is a single pole multiple throw (SPDT) rotary switch with 25 contact positions. It is designed for use with AC-1, AC-3 and DC-1 rated applications and is suitable for a maximum current of 20 Amp and a power rating of 12 Kw. The switch also comes with four solder lug terminals and can be easily installed in a variety of enclosures.

The switch is used for applications such as motor reversing, branch circuiting and motor speed selection. It is also used for selectors in control switches, industrial grade switchgear, panel board equipment and other applications where a single pole multiple throw (SPDT) switch is needed.

Due to its rugged construction and high electrical insulation strain relief, the RTAP36205B05SD25S switch is ideal for use in hostile environments where moisture and vibration may be present. The switch is constructed from engineering plastic and is compatible with UL94V-0 flame class rated polyester.

Working Principle

The RTAP36205B05SD25S rotary switch is operated by rotating the switch shaft. When the switch shaft is moved, the knob is locked in one of the 25 positions, which are spaced equi-distant from each other. The switch is designed to only allow one contact position to be open at a time, preventing accidental short circuiting.

The switch has a built-in spring mechanism which ensures the switch returns to it\'s original position when the shaft is released. This is important as it prevents the switch movent from being overridden and the switch being left in an undesirable state. This is particularly useful in applications where the switch needs to be left in a neutral position when not in use.

The switch also has a built-in safety feature that prevents accidental turning of the shaft, preventing the user from touching the contacts and being electrocuted. This is especially important in industrial grade switchgear where switching currents are high and the risk of electric shock is high.

Conclusion

The RTAP36205B05SD25S is a single pole multiple throw (SPDT) rotary switch with 25 contact positions. It is suitable for a variety of applications including motor reversing, branch circuiting, motor speed selection and control switches. The switch is operated by rotating the switch shaft and has a built-in spring mechanism and safety feature to ensure safe use. In conclusion, the RTAP36205B05SD25S is a reliable and robust switch that is ideal for a wide range of applications.