---
product_id: 7520803
title: "Supco RCO810 3 n' 1 START Hard Start Kit , Black"
brand: "supco"
price: "$32.33"
currency: USD
in_stock: true
reviews_count: 12
category: "Supco"
url: https://www.desertcart.us/products/7520803-supco-rco810-3-n-1-start-hard-start-kit-black
store_origin: US
region: United States of America
---

# 16A Amperage Power Boost 3-in-1 Relay, Capacitor & Overload Pre-Wired for Easy Install Supco RCO810 3 n' 1 START Hard Start Kit , Black

**Brand:** supco
**Price:** $32.33
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Up Your Compressor in a Snap!

## Quick Answers

- **What is this?** Supco RCO810 3 n' 1 START Hard Start Kit , Black by supco
- **How much does it cost?** $32.33 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/7520803-supco-rco810-3-n-1-start-hard-start-kit-black)

## Best For

- supco enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** Weighs just 3.2 ounces with a sleek design that fits seamlessly into your setup.
- • **Universal Compatibility:** Designed for compressors from 1/12 to 1/5 HP—perfect fit for your fridge or freezer.
- • **All-in-One Power Solution:** Relay, capacitor, and overload device combined for maximum startup efficiency.
- • **Durable & Reliable Performance:** Trusted Supco brand with 4.5-star rating from over 2,500 users.
- • **Effortless 5-Minute Installation:** Get your compressor running fast without the hassle—no electrician needed.

## Overview

The Supco RCO810 3 n' 1 START Hard Start Kit is a compact, pre-wired solution designed to boost compressor startup for 1/12 to 1/5 HP units. Combining a relay, capacitor, and overload device, it delivers reliable 16A power support, ensuring quick and easy installation with proven durability and a strong user satisfaction rating.

## Description

Product Description This 3 in 1 start kit is for compressors with horse power of 1/12 through 1/5. From the Manufacturer This 3 in 1 start kit is for compressors with horse power of 1/12 through 1/5.

Review: Easy installation took only 5 minutes - I just received and installed this 3-1 Starter Kit. And it’s working perfectly.
Review: Scary in theory but easy irl. Works! - Haier fridge/freezer stopped running correctly and this thing has it up and running again. Kinda scary at first, but pop off a piece to expose the 3 prongs. Once you place those wires, I cut the power which was red and blue then spliced them to the hard start kit black wires and I was up and running!

## Features

- 110 To 125Vac
- Includes Relay, Capacitor, And Overload Device
- Totally Pre-Wired
- Brand Name: Supco

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00A8O0E5Y |
| Amperage | 16 |
| Best Sellers Rank | #37,967 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #177 in Industrial Electrical Capacitors |
| Brand | Supco |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,575) |
| Date First Available | March 1, 2011 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.2 ounces |
| Item model number | RCO810 |
| Manufacturer | CE Sundberg |
| Manufacturer Part Number | RCO810 |
| Model | RCO810 3 n' 1 START Hard Start Kit |
| Product Dimensions | 30"D x 8"W x 6"H |
| UPC | 759569276561 687152023790 |

## Product Details

- **Battery Cell Composition:** Lead-Acid, AGM
- **Brand:** Supco
- **Product Dimensions:** 30"D x 8"W x 6"H
- **Vehicle Service Type:** RV, Truck, Trailer
- **Voltage:** 125 Volts

## Images

![Supco RCO810 3 n' 1 START Hard Start Kit , Black - Image 1](https://m.media-amazon.com/images/I/81FrozBiXrL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy installation took only 5 minutes
*by R***A on January 15, 2026*

I just received and installed this 3-1 Starter Kit. And it’s working perfectly.

### ⭐⭐⭐⭐⭐ Scary in theory but easy irl. Works!
*by J***F on February 9, 2026*

Haier fridge/freezer stopped running correctly and this thing has it up and running again. Kinda scary at first, but pop off a piece to expose the 3 prongs. Once you place those wires, I cut the power which was red and blue then spliced them to the hard start kit black wires and I was up and running!

### ⭐⭐⭐⭐⭐ An easy and cheap fix to replace a broken and obsolete freezer start relay
*by R***Y on February 20, 2017*

I used one of these to revive a 1995 upright Kenmore freezer that I use for homebrew fermentations. I moved the freezer recently and after letting it sit unpowered for a day when I plugged it in the compressor would start for 5 seconds then cut out though the blower would continue. The freezer wouldn't cool at all. A bit of googling pointed to the start relay as the likely culprit but that part, which is also used in this era's Whirlpool and Fridigaire freezers, was no longer manufactured and the only one I could find was $60 on Amazon. However it was sold in the marketplace and was shipped from overseas so I'd be taking a chance I could not return it if it didn't work. Continuing to look for solutions, I found a youtube video which showed how the Supco 3 n' 1 could be used to replace the start relay and since it was only $11 and sold by Amazon it was a less risky purchase. The only question before buying it was how much horsepower my freezer had, as that determined which Supco I needed to buy. My freezer apparently was 1/5 HP based on a website I found which equated amp and volts to HP so I went with the 810 as opposed to 410 model. Changing out the start relay and installing the Supco then zip tying it in place was about a 15 minute job. Make sure you remove all of the old starter relay so you can see the 3 pins on the compressor where the Supco connects and you then connect the two power wires from the old start relay to those on the Supco. The freezer immediately started working correctly again and has been for about a week. It is running more efficiently that it did with the old start relay based on how much electricity it is using now versus running with the old start relay as shown by my Kill-a-watt meter. Not bad for a 22 year old freezer.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-16*