This is a motor capacitor for 3 phase brusheless coolant pump motor. The pump needs help starting. We looked in the pump, spins freely with no sign of mechanical restrictions.
I would like to order another capacitor. 2mfd, 350vac.
Will I be breaking anything if I replace with 3mfd or 3.5 mdf, or higher ? The 2mfd is less easy to find and / or more expensive. And any other advice would be preciated, thanks.
Can't answer but, maybe this'll help - Electric Motor Starting Capacitor Selection Select an A/C Compressor & Other Electric Motor Start-Boost Capacitors
Don't confuse mF with uF.
You need the exact value, but voltage can be higher.
2uF/450volt caps with wires are less than $2 on ebay.
Leo..
I'm pretty sure its not a 3-phase brushless motor, its a 2-phase induction motor.
The capacitor value needs to be close to the original - 50% wrong would be bad.
For other advice those screw-on plastic wire-joint things are not great, unless the wires inside them are crimped or soldered properly.
They look like proper crimp-on lugs, not screw-on lugs.
Leo..
Indeed, they are crimp connectors, not "wire nuts".
Which unfortunately means you have to cut the wires to change the capacitor.
And it obviously is not a three phase motor, and I very much doubt it is a capacitor start. Looks more like a capacitor run as in a fan or clothes drier. Is it perchance reversible, or multi-speed?
I would think, if there is no other coil switching, or capacitors for the motor, it is a PSC Permanent Split Capacitor Motor - its Advantages Applications & Limitations - Circuit Globe. As everyone is saying, keep the same uF, increase the voltage if needed, and make sure it's continuously rated.
