A capacitor with a metal housing rated at 25 uf is what kind of capacitor?

A capacitor with a metal housing rated at 25 microfarads (uf) is classified as a run capacitor. Run capacitors are typically used in motors to improve their efficiency by providing a continuous phase shift for the motor’s operation. This allows the motor to operate more smoothly and efficiently under varying load conditions.

Run capacitors are generally characterized by their ability to be operational for extended periods, as opposed to start capacitors, which are only used momentarily during the motor's startup phase. The metal housing often indicates a durable design that is suitable for continuous use, supporting their intended functionality in appliances and equipment that require ongoing power.

Start capacitors, on the other hand, are designed for brief use and usually have larger capacitance values for the purpose of providing the necessary phase shift at startup. Pulse capacitors are associated with applications like igniting spark plugs and are not typically used in continuous operation situations. Bypass capacitors serve to filter or stabilize signals in electronic circuits and do not directly relate to motor operations in the same manner.

Thus, the characteristics of a 25 uf capacitor with a metal housing align well with that of a run capacitor due to its design and functionality.