---
product_id: 3947095
title: "MARS - Motors & Armatures 12783 Round 35 + 5 uf MFD 440V VAC Motor Dual Run Capacitor"
brand: "mars"
price: "$37.36"
currency: USD
in_stock: true
reviews_count: 8
category: "Mars"
url: https://www.desertcart.us/products/3947095-mars-motors-and-armatures-12783-round-35-5-uf-mfd
store_origin: US
region: United States of America
---

# 35 + 5 µF dual capacitance 50/60 Hz universal frequency 440V max operating voltage MARS - Motors & Armatures 12783 Round 35 + 5 uf MFD 440V VAC Motor Dual Run Capacitor

**Brand:** mars
**Price:** $37.36
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your HVAC with Mars2 – the capacitor that keeps you cool and in control!

## Quick Answers

- **What is this?** MARS - Motors & Armatures 12783 Round 35 + 5 uf MFD 440V VAC Motor Dual Run Capacitor by mars
- **How much does it cost?** $37.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/3947095-mars-motors-and-armatures-12783-round-35-5-uf-mfd)

## Best For

- mars enthusiasts

## Why This Product

- Trusted mars brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **OEM Quality Assurance:** Brand new Mars2 capacitor ensures OEM-level durability and fit
- • **High Voltage Endurance:** Rated for 440V to handle demanding HVAC systems with ease
- • **Dual Capacitance Power Boost:** 35 + 5 µF for reliable motor start and run performance
- • **Effortless Replacement Upgrade:** Simple swap-in design to revive your HVAC unit’s efficiency fast
- • **Universal Frequency Compatibility:** Operates seamlessly at both 50 and 60 Hz for global use

## Overview

The MARS 12783 Round Dual Run Capacitor delivers 35 + 5 µF capacitance at a robust 440V rating, compatible with both 50 and 60 Hz systems. Designed as a brand new OEM replacement, it ensures reliable motor start and run performance across universal HVAC applications, making it the go-to fix for professionals and DIYers aiming to restore peak system efficiency.

## Description

Brand new round oem Mars2 run capacitor; 35 + 5 UF MFD 440 volt vac; 50/60 hz; the Mars2 line of run capacitors are used in universal applications for every situation.

Review: Perfect Replacement - Got this to replace the start/run capacitor on my Coleman HVAC unit. The fan was fairly frequently not starting, at which point you could hear the compressor hissing, which is not a good thing. So far this has worked flawlessly and was super easy to replace.
Review: Cheap easy fix just be careful as capacitors store energy. - First and foremost capacitors and hvac in general can be deadly. Do your research and make sure every power source is disconnected and you discharge capacitors correctly before handling. A couple days ago I noticed the house was getting warm. I went outside and checked condenser unit nothing seemed odd. Whole hvac system is from 1999/2000 so it’s old but simple. I have a smart thermostat so I could control it from my phone from outside. I shut the system down and then turned it back on. Fan started but was really slow. I never heard compressor kick on but the fan is so noisy it’s kinda hard to tell. I started doing a little research and have always heard 8/10 times the capacitor has failed, 1/10 the contacts have failed and 1/10 the unit has a failure. I don’t have a voltage meter handy so I decided the capacitor must have enough juice to barely start the fan but definitely not enough to start the compressor. So I opened up the side panel after shutting off breakers and pulling the outside disconnect. I used an insulated handle screwdriver to cross all the capacitor lugs then proceeded to disassemble it to get the info off it. It was a made in china model go figure it crapped out. Did some research on best capacitors to by and mars was in the top three. This is a rather easy and cheap fix even if you don’t have correct tools to test the capacitor. I have learned to work on everything out of necessity of being broke. Put the new capacitor on tonight and everything fired right up like it should. FYI take pictures of your wires going into the cap.

## Features

- Brand new round OEM mars2 run capacitor
- 35 + 5 UF MFD 440 volt vac
- 50/60 hz capacitor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005Y1FAMS |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #53,022 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #201 in Industrial Electrical Capacitors |
| Color | No Finish |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,327) |
| Date First Available | October 20, 2011 |
| Included Components | 1 capcitor |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4.8 ounces |
| Item model number | 12783 |
| Manufacturer | MARS - Motors & Armatures, Inc. |
| Maximum Voltage | 440 Volts |
| Mounting Type | Rack Mount |
| Number Of Pieces | 1 |
| Part Number | 12783 |
| Power Source | Ac/DC |
| Product Dimensions | 2"W x 5"H |
| Special Features | Paintable |
| UPC | 685744127833 |
| Upper Temperature Rating | 70 Degrees Celsius |

## Product Details

- **Brand:** MARS
- **Capacitance:** 35 Microfarad
- **Material:** Metal
- **Operating Voltage:** 440 Volts
- **Shape:** Round

## Images

![MARS - Motors & Armatures 12783 Round 35 + 5 uf MFD 440V VAC Motor Dual Run Capacitor - Image 1](https://m.media-amazon.com/images/I/51eZxPoot9L.jpg)

## Questions & Answers

**Q: My current capacitor is 35/5, but the fan terminal only has 1 connector and 1 wire, this one has 2 fan connectors. How do I know which to use?**
A: If you are talking about the connections on each terminal then it’s fine to have more.  Most of the replacement units come with 4 connector prongs per terminal. Those 4 prongs are all one piece of metal and are only there for extra connections if needed. The capacitor rating and quantity of terminals is what’s important, not how many prongs are on each terminal. (Unless it’s fewer than what you need)

**Q: Will this work on Armstrong concept 1000 scu10e24a-2?**
A: I am not sure if this will work on the AC you are questioning, but it was the exact one for my 20 plus years old AC.  I think they are pretty universal.

**Q: Is this cspacitator for model number 116bna036-a**
A: Yes it will

**Q: This is a perfect match to the one I’m replacing(35+5 440/370 +-6) but the item I received is 35+5 370/440 +-5.  Is this okay to use?**
A: I think the main thing is the 35+5 . Looks as if the 370/440 are just switched  around.  Mostly all that just different distributors.  All should be fine..

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect Replacement
*by A***U on February 24, 2024*

Got this to replace the start/run capacitor on my Coleman HVAC unit. The fan was fairly frequently not starting, at which point you could hear the compressor hissing, which is not a good thing. So far this has worked flawlessly and was super easy to replace.

### ⭐⭐⭐⭐⭐ Cheap easy fix just be careful as capacitors store energy.
*by B***0 on September 13, 2025*

First and foremost capacitors and hvac in general can be deadly. Do your research and make sure every power source is disconnected and you discharge capacitors correctly before handling. A couple days ago I noticed the house was getting warm. I went outside and checked condenser unit nothing seemed odd. Whole hvac system is from 1999/2000 so it’s old but simple. I have a smart thermostat so I could control it from my phone from outside. I shut the system down and then turned it back on. Fan started but was really slow. I never heard compressor kick on but the fan is so noisy it’s kinda hard to tell. I started doing a little research and have always heard 8/10 times the capacitor has failed, 1/10 the contacts have failed and 1/10 the unit has a failure. I don’t have a voltage meter handy so I decided the capacitor must have enough juice to barely start the fan but definitely not enough to start the compressor. So I opened up the side panel after shutting off breakers and pulling the outside disconnect. I used an insulated handle screwdriver to cross all the capacitor lugs then proceeded to disassemble it to get the info off it. It was a made in china model go figure it crapped out. Did some research on best capacitors to by and mars was in the top three. This is a rather easy and cheap fix even if you don’t have correct tools to test the capacitor. I have learned to work on everything out of necessity of being broke. Put the new capacitor on tonight and everything fired right up like it should. FYI take pictures of your wires going into the cap.

### ⭐⭐⭐⭐⭐ Mars/Jard is top tier for HVAC parts.
*by M***3 on July 16, 2024*

I work in construction. Not HVAC but I hang out with them any chance I get due to the fact that it cost a paycheck to have an HVAC company do the simplest repairs. This one falls into that category and imo is most likely the issue if your AC unit (or fridge) won't kick on. As with anything, before I make a call to a repair company or friend in the business, I open up the unit and take a look. Look for burnt wires or any obvious defects. Most of the time I see the issue rather quickly. With this you will most likely here a buzz. A bad cap will sound like the unit trying so hard to start but just not enough juice. If you are here, you are probably a diy person and rely on google and reviews for your parts and advice. For any hvac parts Mars is the best but not always the cheapest. If you can find the Mars or JARD brand here at Amazon you will find the best part at the best price. BE CAREFUL with these capacitators. They store power so even if they are not connected you can get shocked and severely shocked. I was happy Amazon carried this and more than half the cost of my local service center and 1/10th of the cost of a repair person. A simple, low cost repair. Like changing a battery. Thumbs up to Amazon for having this available for me.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-11*