Mars 12905 Single Oval Run Capacitor is a 5 μF, 370 VAC replacement capacitor designed to support steady motor operation in compatible HVAC equipment.

Built for 50/60 Hz applications, this single oval capacitor helps maintain the proper electrical phase shift required by condenser fan motors, blower motors, and other approved systems using the same microfarad and voltage rating.

Its internally protected, non-PCB design supports dependable service replacement, while the compact oval case and terminal tabs fit standard HVAC repair applications. Always confirm 5 μF, 370 VAC, case style, terminal type, and equipment requirements before installation.

Frequently Asked Questions
 

• What is the MARS 12905 run capacitor used for?

The MARS 12905 is used to help compatible HVAC motors maintain the proper electrical phase shift needed for steady operation. It is commonly used with condenser fan motors, blower motors, and other approved equipment requiring a 5 μF, 370 VAC run capacitor.

• What are the main specifications of the MARS 12905?

The MARS 12905 is a single oval run capacitor rated at 5 μF, 370 VAC, and 50/60 Hz.

• Can this capacitor replace any 5 μF capacitor?

It may replace another 5 μF run capacitor only when the voltage rating, case style, terminal type, physical size, and equipment requirements match. Always compare the original capacitor and equipment specifications before installation.

• Can a 370 VAC capacitor replace a lower voltage capacitor?

A 370 VAC capacitor may replace a capacitor with the same microfarad rating and equal or lower voltage rating when approved by the equipment manufacturer. Never use a capacitor with a lower voltage rating than required.

• Is the MARS 12905 a start capacitor or run capacitor?

The MARS 12905 is a run capacitor. It is designed for continuous-duty motor operation, not for temporary starting boost like a start capacitor.

• What does 5 μF mean?

5 μF means 5 microfarads, which is the capacitance value. The replacement capacitor must match the required microfarad rating unless the equipment documentation allows otherwise.

• Is this capacitor non-PCB?

Yes. The label identifies it as a non-PCB capacitor.