--- product_id: 292715902 title: "SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque" brand: "supco" price: "424 kr" currency: NOK in_stock: true reviews_count: 5 category: "Supco" url: https://www.desertcart.no/products/292715902-supco-spp6-relay-capacitor-hard-start-kit-with-500-increase store_origin: NO region: Norway --- # 500% boost in starting torque 156μF high-capacitance power Universal fit for PSC AC & heat pumps SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque **Brand:** supco **Price:** 424 kr **Availability:** ✅ In Stock ## Summary > ⚡ Power Up Your HVAC Game with 500% More Torque! ## Quick Answers - **What is this?** SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque by supco - **How much does it cost?** 424 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/292715902-supco-spp6-relay-capacitor-hard-start-kit-with-500-increase) ## 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 - • **Trusted Performance:** Backed by a 4.6-star rating from over 1,700 satisfied professionals who demand efficiency and reliability. - • **Turbocharge Your Start:** Experience a staggering 500% increase in compressor starting torque for faster, smoother HVAC startups. - • **Versatile Compatibility:** Designed specifically for permanent split capacitor single-phase A/C and heat pump systems—perfect for residential and commercial use. - • **Compact & Durable Design:** Lightweight 136g copper construction with panel or surface mount options for easy, reliable installation. - • **Precision Power Delivery:** 156 microfarad capacitance ensures optimal energy flow, reducing strain and extending compressor life. ## Overview The SUPCO SPP6 Hard Start Kit delivers a powerful 500% increase in compressor starting torque, optimized for permanent split capacitor single-phase air conditioners and heat pumps. Featuring a robust 156μF capacitor and durable copper components, this compact kit ensures faster startups, reduced compressor wear, and versatile mounting options. Trusted by thousands with a 4.6-star rating, it’s the go-to upgrade for professionals seeking reliable, efficient HVAC performance. ## Description Relay/CAPACITOR hard start kit 500% incr starting torque,increased compressor starting torque. Designed for use on permanent split CAPACITOR single phase a/c and heat pump systems. Multiple use includes: room air conditioner units, residential or commercial psc AC units.. the country of origin is china. Review: Hard start - Worked great !!! Installed on my condenser because compressor was having issues starting. Completely fixed it Review: Fonctionne bien - Conforme à la description, fonctionne bien, aide énormément au démarrage du compresseur de mon climatiseur. Facile d’installation ! ## Features - Relay/capacitor hard start kit 500% incr starting torque - Increased compressor starting torque. Designed for use on permanent split capacitor single phase a/C and heat pump systems - The country of origin is china ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002YTLFE | | Brand | Supco | | Brand Name | Supco | | Capacitance | 156 Microfarad | | Customer Reviews | 4.6 out of 5 stars 1,787 Reviews | | Global Trade Identification Number | 00687152197361 | | Included Components | Electrical Replacement Parts^Electrical Replacement Parts^replacement-household-furnace-control-circuit-boards | | Item Dimensions W x H | 8.9W x 4.4H centimeters | | Item Shape | Round | | Item Type Name | Relay/Capacitor Hard Start Kit 500% Incr Starting Torque - 661389 | | Item Weight | 136 g | | Manufacturer | SUPCO | | Material | Copper | | Material Type | Copper | | Maximum Voltage | 277 Volts | | Maximum voltage | 277 Volts | | Model | SPP6 | | Mounting Type | Panel Mount or Surface Mount | | Number of Items | 1 | | Number of Packs | 1 | | Operating Voltage | 277 Volts | | Operating voltage | 277 Volts | | Part Number | SPP6 | | Shape | Round | | UPC | 687152031528 687152197361 | | Unit Count | 1 Count | ## Product Details - **Brand:** Supco - **Capacitance:** 156 Microfarad - **Material:** Copper - **Operating voltage:** 277 Volts - **Shape:** Round ## Images ![SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque - Image 1](https://m.media-amazon.com/images/I/51BsUWQMdTL.jpg) ![SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque - Image 2](https://m.media-amazon.com/images/I/31LvJXYzB6L.jpg) ## Questions & Answers **Q: I live in Az.I need a hard start kit for a 30,000 btu 2.5 ton,which one do you recommend?** A: The Supco uses a Positive Temperature Coefficient Relay (as stated on their website) not a Potential Relay. Not Good! Only use Hard Start Kits that use a true Potential Relay. The RectorSeal Kickstart (2 wire) and the 5-2-1 Compressor Saver (3 wire) hard start kits use a Potential Relay. I recommend the Kickstart (it uses 2 wires that connect to the Run Capacitor - HERM and COM). But the Compressor Saver is also good (3 wires with one connecting to the common / ground on the Contactor relay). They both work the same way - the Potential Relay detects the pickup voltage (back EMF). This causes the relay to disconnect the start capacitor when the compressor reaches about 75% speed (usually less than a second). Note: Supco does have hard start kits with a Mechanical Potential Relay (Models 3W1, 3W2, & 3W3) but they are not available on Amazon. **Q: If there is an existing start capacitor, can you put this one in parallel with it or the run capacitor?** A: This takes the place of the start capacitor. It gives an old compressor a "punch" as it starts and it immediately goes out of the start up circuit. They work! It is wired in parallel with the run capacitor, which stays in teh circuit so your compressor will run more efficiently..electrically speaking. **Q: Can a hard start kit help an a/c compressor start when powered by a generator which more than satisfies the unit's FLA but is just shy of the LRA?** A: Greetings,I use these for my rental apartment AC units they keep these old units running and starting easy! They need to be checked every 2 year or so. If you are just shy of the Locked Rotor Amperage; The amperage the motor draws when the voltage is first applied to the motor and the rotor has not started to turn. This amperage is usually up to 300% of the motors running amperage. Once the rotor starts to turn the motor generates a back EMF (electro motive force) that opposes the high inrush current. This back EMF drives the amperage down until the motor gets up to its rated speed at which time the motor amperage will be at its run amperage. This device helps starting and should make you successful. Make sure that your line voltage is being properly supplied during the high current peak that you have proper AWG for the load and length from your generator to your compressor as it could be a voltage drop issue.Never the less a good part and should help.Best of LuckDarrell **Q: Is this pretty easy to install? Is it just removing two wires from the old capacitor and reattaching to the new hard start capacitor? Thanks.** A: The hard start cap installs in parallel with the old cap. You connect one wire to the common and one wire to the herm terminals on the old cap. This just gives the compressor an extra kick. I would recommend that you get the 5-2-1 hard start kit instead. I have tried both and the 5-2-1 works better. Just search on Amazon for 5-2-1 hard start kit. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Hard start *by J***S on 6 December 2024* Worked great !!! Installed on my condenser because compressor was having issues starting. Completely fixed it ### ⭐⭐⭐⭐⭐ Fonctionne bien *by C***N on 20 May 2023* Conforme à la description, fonctionne bien, aide énormément au démarrage du compresseur de mon climatiseur. Facile d’installation ! ### ⭐⭐⭐⭐⭐ Works mint!! *by A***R on 27 August 2016* This worked great. I have a champion 3400 generator inverter and it would not start my 13500 btu dometic brisk air 2. At first I thought it was my generator not putting out enough watts but I tested some other things and was able to put out up to 3200 running watts. Turns out my ac pulls up to 8000 watts on start up for that split second and was overloading my generator. Very frustrating because it's the whole reason I bought the 3400. I did alot of research and read about capacitors and how they work. From what I understand these newer air conditioners come with very small hard start capacitors. I'm sure they do it to try and save on costs. So I figured for 13 bucks it's worth a try. Installation is very easy you just piggy back it to your stock hard start capacitor it plugs right in. The hardest thing for me was trying to figure out where to mount it. Anyways my generator now barely throttles up when I start my ac. I can even start my ac on econ mode on my generator. I also tried my buddies honda 2000 and it started right up. You wouldn't be able to run much more but it did start it and ran my ac just fine. So do your research because this saved me tons of money I was pretty close to buying another generator to pair up with my original. Make sure you look at your compressor on your ac. The lra on mine was like 67 that's your starting amps. 67 amps times 120 volts equals 8040 watts. I don't know for sure how much the spp6 cut my starting watts down but it has to be under 2000 watts. I highly recommend. ## Frequently Bought Together - SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque - VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool - TITAN PRO, 1 Count (Pack of 1), No Color Packard TRCFD455 45+5MFD 440/370V Round Run Capacitor Replaces PRCFD455 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.no/products/292715902-supco-spp6-relay-capacitor-hard-start-kit-with-500-increase](https://www.desertcart.no/products/292715902-supco-spp6-relay-capacitor-hard-start-kit-with-500-increase) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-24*