--- product_id: 12801011 title: "Intermatic AG3000 HVAC Surge Protective Device, 120/240 VAC" price: "4148988₫" currency: VND in_stock: true reviews_count: 13 url: https://www.desertcart.vn/products/12801011-intermatic-ag3000-hvac-surge-protective-device-120-240-vac store_origin: VN region: Vietnam --- # 3-mode surge protection (L-G, L-L, L-N) Type 4X watertight & UV resistant TPMOV tech for fail-safe defense Intermatic AG3000 HVAC Surge Protective Device, 120/240 VAC **Price:** 4148988₫ **Availability:** ✅ In Stock ## Summary > ⚡ Protect your power, protect your peace of mind. ## Quick Answers - **What is this?** Intermatic AG3000 HVAC Surge Protective Device, 120/240 VAC - **How much does it cost?** 4148988₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/12801011-intermatic-ag3000-hvac-surge-protective-device-120-240-vac) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Visual Status:** Green LED indicator keeps you effortlessly informed on your system’s safety. - • **Certified & Guaranteed:** UL Listed with a 3-year warranty plus $7,500 connected equipment coverage—peace of mind included. - • **Weatherproof Durability:** Type 4X enclosure ensures long-lasting protection indoors or out, rain or shine. - • **Triple-Mode Surge Shield:** Robust 3-way protection guards your HVAC and home devices from every angle. - • **Next-Gen TPMOV Technology:** Eliminates hazardous failures for unmatched, reliable surge defense. ## Overview The Intermatic AG3000 is a UL-listed HVAC surge protective device featuring advanced TPMOV technology and triple-mode surge defense. Its rugged Type 4X enclosure offers watertight, UV-resistant durability for indoor/outdoor use, while a green LED provides real-time protection status. Backed by a 3-year warranty and $7,500 connected equipment coverage, it’s the smart choice to safeguard your HVAC system from damaging power surges. ## Description Power surges are the silent killer for home appliances and HVAC equipment. Most homeowners protect their electronics, but leave more valued equipment unprotected. Surges can wipe out equipment and leave you searching for answers. Search no more. The easy-to-install AG3000 Surge Protective Device (SPD) is the perfect add-on for HVAC equipment. A green LED indicator provides the status of protection. Trusted, state-of-the-art TPMOV (Thermally Protected Metal Oxide Varistor) technology eliminates the potentially hazardous failure modes that are commonly associated with standard MOV technology. UL Listed to ANSI/UL 1449, 4th Edition. Review: Best Surge Arrestor On The Market And Easy Step By Step Installation Instructions - READ! - I am a retired electrical engineer and after a lot of research I found the Intermatic AG300 to be the very best surge protector one can get for their air conditioner system. It is very easy to install and you do not need to hire anyone to do it for you. What prompted me to purchase these was because the new air conditioning systems that were installed on my home comes with free 6 month check-ups. They insisted that surge protection is essential and they are actually correct. But they wanted $3100 to install them on 2 outside 240 volt compressor units and 2 inside120 volts air handlers, for a total of 4 surge protectors. I bought these on desertcart and installed them in about 15 minutes each. Incredibly easy if you have any common sense at all. You don't need to be an electrician. The 2 outside units for the compressors are wired as follows: (1) Turn off the breaker. (2) The side of each A/C disconnect have sectional knock-outs on them. The smallest is 1/2 inch and that is the one to knock out using a screwdriver and a pair plyers lightly tapping on it until it comes out. Move it back and forth and it will break free. (3) Slide the wires through this hole with the rubber grommet and locknut on the OUTSIDE. (4) The remaining locknut gets slipped over the wires inside and tighten down on the stem you stuck through the original 1/2" hole. Now you have a watertight connection. (5) There are 2 black wires and 1 white. Cut the wires shorter so there is not too much wire inside the disconnect and for the surge arrestor to work better as longer cables adversely affect it. The shorter, the better! (6) Using a flat head screwdriver, install the white wire to the bare ground bus bar where either bare wires or green wires are already located. (7) Then install the 2 black wires on the "LINE" side of the disconnect. The LINE side is the power side that comes from the breaker box. The "LOAD" side is the ones that go the the A/C unit. The word "LINE" is usually printed inside the disconnect. There will be 2 "LINES" on each disconnect to match the 2 black wires coming from the surge arrestor. Turn on the breaker and you are done. Check to make sure the green light comes on. If not, you have most likely not connected it properly. Keep an eye on the green light over time. Should it burn out, a very heavy surge has caused it and you will need to replace it. As for the inside 120 volt air handler units, the same exact installation method is used except the wiring. Since the air handler unit is 120 volts, BOTH black wires get twisted together and attached to the power connection inside the unit. Usually this is a wire nut that has the power wire (usually black) and air handler wires together. Take it loose and add the 2 black wires under one connection and make tight. Then the white wire gets connected to the white wire supplying the air handler. This is the neutral wire and NOT the green or bare ground. Once this is complete, turn the power back on and the green light will illuminate. Also, most of the time you do not need to turn off the breaker to the air handler. The USA electrical code requires an ON/OFF switch within 6 ft. of the unit. This will look like a switch you have inside your home. Turning this off is the same as turning off the breaker as there will be no power inside the air handler while you install this. Review: Good brand and good price. Do not buy cheap knockoffs. - Very easy installation. It took 15 mins to install. Everything went as expected. Hopefully an ounce of prevention now will save me money later. I bought this brand because it is a well known brand and it should last a long time. I work in the electrical industry. . ## Features - COMPREHENSIVE SURGE SHIELD - Secure your HVAC equipment and household devices with Intermatic AG3000 Surge Protective Device, offering three modes of protection (L-G, L-L, L-N) for robust defense against power surges and potential damage. - CUTTING-EDGE TPMOV TECHNOLOGY - Experience true peace of mind with our state-of-the-art Thermally Protected Metal Oxide Varistor technology, surpassing standard MOV technology by eliminating hazardous failure modes and ensuring steadfast surge protection. - BUILT FOR LONGEVITY -The Type 4X watertight and UV resistant plastic enclosure safeguards against the elements, rendering the AG3000 perfect for both indoor and outdoor setups. Enjoy lasting surge protection and environmental resilience. - VISUAL MONITORING EASE - A green LED indicator on the AG3000 grants at-a-glance protection status, enabling quick verification of equipment safety against power surges. Stay informed and confident in your devices' security. - CERTIFIED RELIABILITY - UL Listed to ANSI/UL 1449 5th Edition, the Intermatic AG3000 carries the industry's highest safety standards. With a 3-year product warranty and a $7,500 connected equipment warranty for 3 years, you can depend on Intermatic's surge protection solution. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B008VM6MXI | | Best Sellers Rank | #4,699 in Electronics ( See Top 100 in Electronics ) #41 in Surge Protectors | | Color | Color | | Customer Reviews | 4.7 4.7 out of 5 stars (1,487) | | Date First Available | August 10, 2012 | | Included Components | AG3000 | | Item Package Quantity | 1 | | Item Weight | 11.2 ounces | | Item model number | AG3000 | | Manufacturer | Intermatic Incorporated | | Material | Plastic,Metal | | Number Of Pieces | 1 | | Number of Handles | 1 | | Part Number | AG3000 | | Product Dimensions | 4.3 x 2 x 4.5 inches | | Shape | Rectangular | | Size | Pack of 1 | | Usage | personal | | Warranty Description | See Manf Description | ## Images ![Intermatic AG3000 HVAC Surge Protective Device, 120/240 VAC - Image 1](https://m.media-amazon.com/images/I/61SDzbcWaHL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I have a whole house surge protector installed. Can I use this intermatic ag3000 hooked at my furnace plus another one at my outdoor ac service?** A: A whole house surge protector, is primary protection. A furnace surge protector is secondary protection. You need both. The furnace has a sensitive circuit board which can, and I have seen, blow out from a surge. These circuit boards can run about $300 from the HVAC tech, if he/she has one in the middle of the winter. Plus the service call charge. **Q: Aloha, I don't understand how this works, The wiring looks like its parallel to the equipment it's protecting. How does it protect it?** A: I placed one at my disconnect box outside by the AC unit. Once you kill the power and remove the cover that hides the wiring, all you do is attach one black wire to each of the incoming hot wires from the house, then connect the green to the ground wire then you have your 220 protected before it reaches your AC unit. to hook it up to your inside furnace you have to twist both black wires together to the incoming hot wire and ground to ground making it a 120 volt surge protector. **Q: do you need this if you have a whole house surge protector that protect the entire fuse box?** A: Hello, It is not required but it is always recommended that you get one to individually protect the outdoor condenser. **Q: This model AG3000, I would serve to protect 100% of my apartment? or just a line? What model would serve me?** A: This will protect only the piece of equipment it’s installed on. This device should not be installed on more than 1 piece of equipment, if you have to ask you probably should have one professionally installed. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best Surge Arrestor On The Market And Easy Step By Step Installation Instructions - READ! *by L***1 on November 2, 2025* I am a retired electrical engineer and after a lot of research I found the Intermatic AG300 to be the very best surge protector one can get for their air conditioner system. It is very easy to install and you do not need to hire anyone to do it for you. What prompted me to purchase these was because the new air conditioning systems that were installed on my home comes with free 6 month check-ups. They insisted that surge protection is essential and they are actually correct. But they wanted $3100 to install them on 2 outside 240 volt compressor units and 2 inside120 volts air handlers, for a total of 4 surge protectors. I bought these on Amazon and installed them in about 15 minutes each. Incredibly easy if you have any common sense at all. You don't need to be an electrician. The 2 outside units for the compressors are wired as follows: (1) Turn off the breaker. (2) The side of each A/C disconnect have sectional knock-outs on them. The smallest is 1/2 inch and that is the one to knock out using a screwdriver and a pair plyers lightly tapping on it until it comes out. Move it back and forth and it will break free. (3) Slide the wires through this hole with the rubber grommet and locknut on the OUTSIDE. (4) The remaining locknut gets slipped over the wires inside and tighten down on the stem you stuck through the original 1/2" hole. Now you have a watertight connection. (5) There are 2 black wires and 1 white. Cut the wires shorter so there is not too much wire inside the disconnect and for the surge arrestor to work better as longer cables adversely affect it. The shorter, the better! (6) Using a flat head screwdriver, install the white wire to the bare ground bus bar where either bare wires or green wires are already located. (7) Then install the 2 black wires on the "LINE" side of the disconnect. The LINE side is the power side that comes from the breaker box. The "LOAD" side is the ones that go the the A/C unit. The word "LINE" is usually printed inside the disconnect. There will be 2 "LINES" on each disconnect to match the 2 black wires coming from the surge arrestor. Turn on the breaker and you are done. Check to make sure the green light comes on. If not, you have most likely not connected it properly. Keep an eye on the green light over time. Should it burn out, a very heavy surge has caused it and you will need to replace it. As for the inside 120 volt air handler units, the same exact installation method is used except the wiring. Since the air handler unit is 120 volts, BOTH black wires get twisted together and attached to the power connection inside the unit. Usually this is a wire nut that has the power wire (usually black) and air handler wires together. Take it loose and add the 2 black wires under one connection and make tight. Then the white wire gets connected to the white wire supplying the air handler. This is the neutral wire and NOT the green or bare ground. Once this is complete, turn the power back on and the green light will illuminate. Also, most of the time you do not need to turn off the breaker to the air handler. The USA electrical code requires an ON/OFF switch within 6 ft. of the unit. This will look like a switch you have inside your home. Turning this off is the same as turning off the breaker as there will be no power inside the air handler while you install this. ### ⭐⭐⭐⭐⭐ Good brand and good price. Do not buy cheap knockoffs. *by S***N on August 21, 2026* Very easy installation. It took 15 mins to install. Everything went as expected. Hopefully an ounce of prevention now will save me money later. I bought this brand because it is a well known brand and it should last a long time. I work in the electrical industry. . ### ⭐⭐⭐⭐⭐ Peace of Mind *by S***E on September 24, 2026* These units are super easy to install and will provide peace of mind against power surges. There are three wires you need to hook up: two connecting to the line side hots at your AC disconnect and the third, a ground wire which you will land on the ground bar in your disconnect. after installation a green light will illuminate letting you know it's active and protecting your equipment. ## Frequently Bought Together - Intermatic AG3000 120/240 VAC Universal HVAC Surge Protective Device - Comprehensive Surge Protection, TPMOV Technology, Watertight Enclosure - UL Listed and Reliable - Sealproof Power Whip Assembly, 1/2-Inch x 6 Ft Nonmetallic Liquid Tight Flexible Electrical Conduit and 10 Gauge Wire Single Phase Preassembled A/C Hook-up Whip Kit, 1/2" - Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack) --- ## 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.vn/products/12801011-intermatic-ag3000-hvac-surge-protective-device-120-240-vac](https://www.desertcart.vn/products/12801011-intermatic-ag3000-hvac-surge-protective-device-120-240-vac) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-10-30*