The Allen-Bradley 803-A74 is a rotation cam switch and is designed under the features of type “A”, from the 803 Allen-Bradley cam switches series. The Allen-Bradley 803-A74 rotation cam switch features a watertight, oil-tight industrial-grade enclosure, more specifically a NEMA Type 4 & 13 enclosure, which allows this unit to operate in environments where it could make contact touch with oils, chemicals, water and ice formations around the enclosure. This enclosure guarantees a high level of security for the internal parts of the unit. The Allen-Bradley 803-A74 rotation cam switch is designed with double break contacts that offer a capacity of 25 Amps; it has one standard left shaft that operates at a velocity of 150 RPM. This unit also has 7 cams, each cam working with a duration of 14 degrees minimum and 346 degrees maximum. The Allen-Bradley 803-A74 rotation cam switch has an anti-vibration mechanism (spira-lock) and a heavy base made of a durable material such as steel. It also counts with rugged cast iron side plates and oversize ball bearings for the shaft of approximately ¾ inches.

The characteristics of this module make it very reliable and capable of working with any compatible heavy-duty machine in the oil & gas industry. The Allen-Bradley 803-A74 rotation cam switch has a length of 17.38 inches (441.3 millimeters) and a shipping weight of 54 pounds (24.5 kilograms). The specific kind of enclosure that this unit has makes it slightly heavier than the original model; this enclosure does, however, enable it to operate in both indoor and outdoor environments at the same time.