--- product_id: 282023638 title: "TEC1-12704 Thermoelectric Cooler Peltier of Semiconductor Refrigeration, 5PCS TEC1-12704 (40*40), 40mm x 40mm x 3.6mm, Desktop Compatible" brand: "bolsen" price: "€ 33.84" currency: EUR in_stock: true url: https://www.desertcart.hr/products/282023638-tec1-12704-thermoelectric-cooler-peltier-of-semiconductor-refrigeration-5pcs-tec1 store_origin: HR region: Croatia --- # Power Efficient Instant Heating Rapid Cooling TEC1-12704 Thermoelectric Cooler Peltier of Semiconductor Refrigeration, 5PCS TEC1-12704 (40*40), 40mm x 40mm x 3.6mm, Desktop Compatible **Brand:** bolsen **Price:** € 33.84 **Availability:** βœ… In Stock ## Summary > 🌑️ Chill or Heat, You Decide! ## Quick Answers - **What is this?** TEC1-12704 Thermoelectric Cooler Peltier of Semiconductor Refrigeration, 5PCS TEC1-12704 (40*40), 40mm x 40mm x 3.6mm, Desktop Compatible by bolsen - **How much does it cost?** € 33.84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/282023638-tec1-12704-thermoelectric-cooler-peltier-of-semiconductor-refrigeration-5pcs-tec1) ## Best For - bolsen enthusiasts ## Why This Product - Trusted bolsen brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Safety First:** Must be paired with a heat sink to prevent overheating. - β€’ **Compact Design:** Overall dimensions of 40*40*4.0mm or 30*30*3.0mm for easy integration. - β€’ **Enhanced Connectivity:** Comes with 300mm lead length for flexible installation. - β€’ **Versatile Applications:** Perfect for CPU coolers, alternate power sources, and DIY projects. - β€’ **Transform Your Temperature:** Get ice cold in minutes or heat to boiling with a simple polarity switch. ## Overview The TEC1-12704 Thermoelectric Cooler is a versatile semiconductor refrigeration device that allows for rapid temperature control, making it ideal for a variety of applications from CPU cooling to DIY projects. With compact dimensions and enhanced connectivity, it’s designed for easy integration while ensuring safety through proper heat sink usage. ## Description TEC1-12704 Thermoelectric Cooler Peltier of Semiconductor Refrigeration, 5PCS TEC1-12704 (40*40), 40mm x 40mm x 3.6mm, Desktop Compatible ## Features - TEC1-12704 12703 12705 12706 12740 12715 TES1-12701 TEC1-12705FX TEC1-19912 TEC2-19003 TEC Thermoelectric Cooler refrigeration 30X30/40X40 Thermoelectric Cooler Peltier of semiconductor refrigeration - Get ice cold in minutes or heat to boiling by simply reversing the polarity, used for numerous applications from CPU coolers to alternate power sources, or even for your own - Overall dimensions: 40*40*4.0mm/30*30*3.0MM element TEC1-12706 12704 12705 12708 12709 12710 12712 12715 - Wire specification: lead length 300 + 5mm RV standard wire single head 5mm tin plating - These devices must be used in conjunction with a heat sink to avoid burned ## Images ![TEC1-12704 Thermoelectric Cooler Peltier of Semiconductor Refrigeration, 5PCS TEC1-12704 (40*40), 40mm x 40mm x 3.6mm, Desktop Compatible - Image 1](https://m.media-amazon.com/images/I/51Seh8cMPVL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: My mini-frig uses one 12704 40 mm x 40 mm Peltier. Can a 12705 or 12706 size be used to replace it? I do not want to buy five 12704's.** A: Most likely not the Peltier, having fixed a couple of (mini coolers, wine cellars and other thermal devices), the problem happens from Electrolytic capacitors that fail with age or are substandard. To check if the Peltier is bad, remove it from the circuit board (it may be connected to a heat sink with thermal paste and screws) test it out of circuit using AA battery. When you connect the battery make sure you use the correct polarity, one side of the Peltier will be cold and reverse side will be hot which means its good, you don't have to reach reverse side full hot temperature. So if it's good, the next step if you don't have a schematic take a closeup picture of the circuit board, or better take notes. Write down the Electrolytic capacitors (position on the circuit board, capacitor values, polarity, physical size, swollen, leaking). Best way to check the capacitors is to unsolder them from the board and use a capacitor checker to check their values (voltage, ESD, Ohms) you will get accurate readings without any other components on the circuit board returning misleading values. I replaced all the Electrolytic capacitors on everything I repaired, and all devices work like brand new, going on four years with no failures. If you opt to replace all the Electrolytic capacitors, buy quality (Nichicon, Panasonic, Leylon) to name a few. Hope this information helps. ## Frequently Bought Together - Bolsen TEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40) - ARCTIC MX-4 (incl. Spatula, 4 g) - Premium Performance Thermal Paste for All Processors (CPU, GPU - PC, PS4, Xbox), Very high Thermal Conductivity, Long Durability, Safe Application, Non-Conductive --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/282023638-tec1-12704-thermoelectric-cooler-peltier-of-semiconductor-refrigeration-5pcs-tec1](https://www.desertcart.hr/products/282023638-tec1-12704-thermoelectric-cooler-peltier-of-semiconductor-refrigeration-5pcs-tec1) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-23*