5KCP39 HVAC Motors - Likely The Most Common Line of HVAC Motors Used Today

We've seen thousands of condenser fan & direct-drive furnace blower motors w/ model numbers prefixed by 5KCP39 or 5KCP29

Before we begin - it's important to note that GE no longer makes fractional horsepower single phase HVAC motors, they're now manufactured by Genteq. Genteq is a division of Regal Beloit Corporation (RBC) and RBC also owns Century, Fasco, Leeson, Marathon, and many other brands of motors.

Let's break down the model number. The 5 in the 5KCP39 indicates that the model number belongs to a rotating device - a motor. The KCP in the 5KCP39 indicates that the rotating device is a Permanent-Split Capacitor type of motor. The 39 in the 5KCP39 indicates that the rotating device is a 48 frame motor.

So, what's a Permanent-Split Capacitor motor? The two most common single phase HVAC motors are Shaded-Pole (SP) and Permanent-Split Capacitor (PSC). PSC motors have an attached run capacitor -- which provides greater start-up torque and makes it more efficient than a SP motor. PSC usually have around have the amp draw as a SP motor with matching HP, RPM and input voltage.

What's a 48 frame motor? 48 is a NEMA -- National Electrical Manufacturers Association -- standard. All 48 frame motors have a 1/2" diameter shaft and a 5-1/2" diameter body. It doesn't matter if the motor is a Fasco, Century, Marathon, Genteq, Emerson or any other brand. A 48 frame is a 48 frame.

An example nameplate of a 5KCP Motor:

Note it's important to have ALL of the information. When you are crossing a motor, you need to have 13 letters/numbers (scene in yellow below on the left). It can also be helpful to utilize the "stock no" as shown below.

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Here are some cross referenced 5KCP39 and 5KCP29 motors for you:

Looking for help? Let the Motor Experts cross your 5KCP39 and 5KCP29 motors for you.

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