--- product_id: 486110422 title: "DBTB0428B2G 40mm Powerful Cooling Fan for AVC 4028 12V 1A High Speed Server Fans 40 * 40 * 28mm Dual Ball Bearing 4-Wire 4Pin PWM" brand: "nnl" price: "€ 19.55" currency: EUR in_stock: true reviews_count: 9 category: "Nnl" url: https://www.desertcart.hr/products/486110422-dbtb0428b2g-40mm-powerful-cooling-fan-for-avc-4028-12v-1a store_origin: HR region: Croatia --- # 19.4 CFM airflow Dual ball bearing durability 18000 RPM max speed DBTB0428B2G 40mm Powerful Cooling Fan for AVC 4028 12V 1A High Speed Server Fans 40 * 40 * 28mm Dual Ball Bearing 4-Wire 4Pin PWM **Brand:** nnl **Price:** € 19.55 **Availability:** βœ… In Stock ## Summary > πŸ’¨ Cool like a pro, run like a boss. ## Quick Answers - **What is this?** DBTB0428B2G 40mm Powerful Cooling Fan for AVC 4028 12V 1A High Speed Server Fans 40 * 40 * 28mm Dual Ball Bearing 4-Wire 4Pin PWM by nnl - **How much does it cost?** € 19.55 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/486110422-dbtb0428b2g-40mm-powerful-cooling-fan-for-avc-4028-12v-1a) ## Best For - nnl enthusiasts ## Why This Product - Trusted nnl brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Pro-Grade Airflow:** Moves 19.4 cubic feet per minute, delivering industrial-strength ventilation for high-demand electronics. - β€’ **Smart PWM Control:** Adaptive speed management that responds to your system’s heat, optimizing performance and energy use. - β€’ **Compact Yet Mighty:** A sleek 40x40x28mm powerhouse that fits tight spaces without compromising on cooling muscle. - β€’ **Turbocharged Cooling Power:** Unleash 18,000 RPM for relentless airflow that keeps your tech chill under pressure. - β€’ **Precision Dual Ball Bearings:** Engineered for longevity and whisper-quiet operation, ensuring your setup stays cool and reliable. ## Overview The NNL DBTB0428B2G is a high-performance 40mm cooling fan designed for server and high-demand electronics. Featuring a robust 18,000 RPM motor, dual ball bearings for extended durability, and PWM intelligent speed control, it delivers 19.4 CFM of airflow in a compact 40x40x28mm frame. Ideal for professionals seeking reliable, powerful cooling solutions that adapt dynamically to temperature changes, this fan balances raw power with precision engineering to keep your systems running cool and efficient. ## Description Bearing: high precision double ball bearing Model: DBTB0428B2G Dimensions: 40 x 40 x 28mm side length 4cm thickness 2.8cm Rated voltage: 12V Current: 1.0A high speed violent large air volume fan Interface: 4 wires (25cm) Speed: 18000 RPM full speed Air volume: 19.4cfm Additional functions: PWM intelligent temperature control and speed measu Review: This thing is seriously powerful. - I am using for a diy 12715 peltier cooling plate. As you know the 12715 module can pull 12v and 10-15 amps. It's a monster of a peltier. With a single albeit huge aluminum heat sink, plenty of thermal grease and just this singular fan mounted to a PWM controller, I was able to consistently get the semiconductor stable at around 3Β° f with only this tiny fan cooling the hot side. That was stable temperature too, not peak. Big difference. I could run that 3Β° f all day long without the heat overpowering the fan. This was achieved with the fan at full power and the semiconductor pulling around 10 volts and 6 amps. Nowhere near its peak, but impressive as all hell. It's the positive pressure design of the fan with almost a built-in duct because it's so thick as well as the RPMs which I've heard is around 18,000 at full tilt. It's pretty much a cold air hair dryer at full throttle it can blow papers off my desk from across my room which is quite large and actually has some kickback, that's how powerful this fan is. With the setup I mentioned above I was able to achieve about a quarter inch thick layer of ice on the cold side heat sink on the semiconductor within 35 minutes of 6 amps of continuous draw from my 300 watt adjustable power supply. From what this singular fan proved to me, I figure if I order three more and a much bigger heat sink to accommodate, I could run that semiconductor close to full capacity with no cooling issues whatsoever. I thought for sure I'd have to go water cooling for a 12715 but these fans have proved otherwise. They are extremely loud when at full throttle but for my application, which is intermittent fast cooling of electronics on a cold aluminum plate, this is just fine as it runs for very short periods so the turbine like sound of this fan doesn't bother me too much. It is very much a turbine sound though, it's almost ear piercing if left on for a long time, thank God for my Galaxy buds 2 pro with active noise cancellation for the longer sessions because this sucker really screams but it puts out the CFMs to back it up so I don't mind the noise. I've been using it a few times a week for around 3 months now with some sessions having the fan run full throttle for close to 2 hours at a time with absolutely no issues whatsoever, the most I've ever experienced is after about 2 hours the fan will be slightly warm to the touch but that could be from the peltier as well. All in all it was a great buy and it blows just as much air as it did on day one as it does now. It's become old faithful for me and moves easily 5 times the air as my 120 mm 12 volt 0.25 amp fan. Granted the 120 mm is nowhere near as thick so there's no ducting whatsoever and I don't believe it's meant for positive pressure like this is but still these little things seem to be the way to go if you want to successfully cool off a ridiculously angry power-hungry peltier module. Just make sure you get a really high-end heat sink. The heat sink is the most crucial part of any semiconductor setup. Mine is milled from a solid block of aluminum with copper vapor chambers at each corner running down to the hot side ventilation blocks, there are four copper vapor chambers running to two cooling blocks I plan to have two of these fans on each cooling block and I have no doubts I'll be able to run my chip at it's a rated maximum without any overheating issues since I can run it more than half of its capacity with just this single 40x40 fan Review: Great choice for the R/C hobby! - Great fans for the R/C hobby! So, great I bought 4 more, for my Traxxas XRT, the fans are paired with a quad mount from HyperFlow Fans. I'm running an 800kv G2 Motor and Max 5 G2 ESC. Just cut the blue and yellow wires and use the black and red wires to run off the reciever, you could wire them up to run off of a 4s lipo, or you could set the up )Not Recommend, in my opinion) to run off of your lipo's balance leads. These things move a lot of air, definitely loud. But!!! Loud is awesome!!! Right?! ## Features - Model: DBTB0428B2G - Bearing: high precision double ball bearing - Current: 1.0A high speed violent large air volume fan - Dimensions: 40 x 40 x 28mm side length 4cm thickness 2.8cm - Additional functions: PWM intelligent temperature control and speed measu ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B7814RQD | | Air Flow Capacity | 19.4 Cubic Feet Per Minute | | Best Sellers Rank | #530 in Computer Case Fans | | Brand Name | NNL | | Compatible Devices | Server | | Cooling Method | Air | | Customer Reviews | 4.3 4.3 out of 5 stars (43) | | Item Dimensions L x W x H | 1.1"L x 1.57"W x 1.57"H | | Item Weight | 100 Grams | | Manufacturer | NNL | | Material Type | Copper | | Maximum Rotational Speed | 18000 RPM | | Noise Level | 25 Decibels | | Power Connector Type | 4-Pin | | UPC | 768481474184 | | Unit Count | 1.0 Count | | Voltage | 12 Volts | | Wattage | 3 watts | ## Product Details - **Brand:** NNL - **Compatible Devices:** Server - **Cooling Method:** Air - **Material:** Copper - **Maximum Rotational Speed:** 18000 RPM - **Noise Level:** 25 Decibels - **Power Connector Type:** 4-Pin - **Product Dimensions:** 1.1"L x 1.57"W x 1.57"H - **Voltage:** 12 Volts - **Wattage:** 3 watts ## Images ![DBTB0428B2G 40mm Powerful Cooling Fan for AVC 4028 12V 1A High Speed Server Fans 40 * 40 * 28mm Dual Ball Bearing 4-Wire 4Pin PWM - Image 1](https://m.media-amazon.com/images/I/51hIm0EgP+L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ This thing is seriously powerful. *by S***O on January 4, 2024* I am using for a diy 12715 peltier cooling plate. As you know the 12715 module can pull 12v and 10-15 amps. It's a monster of a peltier. With a single albeit huge aluminum heat sink, plenty of thermal grease and just this singular fan mounted to a PWM controller, I was able to consistently get the semiconductor stable at around 3Β° f with only this tiny fan cooling the hot side. That was stable temperature too, not peak. Big difference. I could run that 3Β° f all day long without the heat overpowering the fan. This was achieved with the fan at full power and the semiconductor pulling around 10 volts and 6 amps. Nowhere near its peak, but impressive as all hell. It's the positive pressure design of the fan with almost a built-in duct because it's so thick as well as the RPMs which I've heard is around 18,000 at full tilt. It's pretty much a cold air hair dryer at full throttle it can blow papers off my desk from across my room which is quite large and actually has some kickback, that's how powerful this fan is. With the setup I mentioned above I was able to achieve about a quarter inch thick layer of ice on the cold side heat sink on the semiconductor within 35 minutes of 6 amps of continuous draw from my 300 watt adjustable power supply. From what this singular fan proved to me, I figure if I order three more and a much bigger heat sink to accommodate, I could run that semiconductor close to full capacity with no cooling issues whatsoever. I thought for sure I'd have to go water cooling for a 12715 but these fans have proved otherwise. They are extremely loud when at full throttle but for my application, which is intermittent fast cooling of electronics on a cold aluminum plate, this is just fine as it runs for very short periods so the turbine like sound of this fan doesn't bother me too much. It is very much a turbine sound though, it's almost ear piercing if left on for a long time, thank God for my Galaxy buds 2 pro with active noise cancellation for the longer sessions because this sucker really screams but it puts out the CFMs to back it up so I don't mind the noise. I've been using it a few times a week for around 3 months now with some sessions having the fan run full throttle for close to 2 hours at a time with absolutely no issues whatsoever, the most I've ever experienced is after about 2 hours the fan will be slightly warm to the touch but that could be from the peltier as well. All in all it was a great buy and it blows just as much air as it did on day one as it does now. It's become old faithful for me and moves easily 5 times the air as my 120 mm 12 volt 0.25 amp fan. Granted the 120 mm is nowhere near as thick so there's no ducting whatsoever and I don't believe it's meant for positive pressure like this is but still these little things seem to be the way to go if you want to successfully cool off a ridiculously angry power-hungry peltier module. Just make sure you get a really high-end heat sink. The heat sink is the most crucial part of any semiconductor setup. Mine is milled from a solid block of aluminum with copper vapor chambers at each corner running down to the hot side ventilation blocks, there are four copper vapor chambers running to two cooling blocks I plan to have two of these fans on each cooling block and I have no doubts I'll be able to run my chip at it's a rated maximum without any overheating issues since I can run it more than half of its capacity with just this single 40x40 fan ### ⭐⭐⭐⭐⭐ Great choice for the R/C hobby! *by L***S on August 19, 2025* Great fans for the R/C hobby! So, great I bought 4 more, for my Traxxas XRT, the fans are paired with a quad mount from HyperFlow Fans. I'm running an 800kv G2 Motor and Max 5 G2 ESC. Just cut the blue and yellow wires and use the black and red wires to run off the reciever, you could wire them up to run off of a 4s lipo, or you could set the up )Not Recommend, in my opinion) to run off of your lipo's balance leads. These things move a lot of air, definitely loud. But!!! Loud is awesome!!! Right?! ### ⭐⭐⭐⭐⭐ Great Powerful and Durable Fan 10/10 *by T***. on March 1, 2026* 10/10 Have been my go to fans for years very powerful and cools whatever I need only pulling 1 Amp for the Power is and cooling area is unmatched πŸ‘ŒπŸΎ 10/10 🌟🌟🌟🌟🌟 ## Frequently Bought Together - NNL DBTB0428B2G 40mm Powerful Cooling Fan for AVC 4028 12V 1A High Speed Server Fans 40 * 40 * 28mm Dual Ball Bearing 4-Wire 4Pin PWM - ARCTIC S4028-15K - 40x40x28 mm Server Fan, 1400–15000 RPM, PWM Regulated, 4-pin Connector, 12 V DC, Rack Cooling Fan - Black - DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo --- ## 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/486110422-dbtb0428b2g-40mm-powerful-cooling-fan-for-avc-4028-12v-1a](https://www.desertcart.hr/products/486110422-dbtb0428b2g-40mm-powerful-cooling-fan-for-avc-4028-12v-1a) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-24*