{"id":3571,"date":"2026-10-21T23:06:08","date_gmt":"2026-10-21T15:06:08","guid":{"rendered":"http:\/\/www.siskiyoucustommilling.net\/blog\/?p=3571"},"modified":"2026-10-21T23:06:08","modified_gmt":"2026-10-21T15:06:08","slug":"what-is-the-rated-power-of-the-3115-motor-47e8-033b32","status":"publish","type":"post","link":"http:\/\/www.siskiyoucustommilling.net\/blog\/2026\/10\/21\/what-is-the-rated-power-of-the-3115-motor-47e8-033b32\/","title":{"rendered":"What is the rated power of the 3115 Motor?"},"content":{"rendered":"

Hey everyone, thanks for swinging by the blog. If you\u2019re here, you\u2019re probably deep in the weeds sourcing motors for your project, or maybe you stumbled here Googling \u201cwhat\u2019s the rated power of a 3115 motor?\u201d Let me cut to the chase\u2014no fluff, no corporate jargon, just straight-up info from someone who actually sells these things, not a Wikipedia page written by a robot. 3115 Motor<\/a><\/p>\n

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First off, let\u2019s get one thing straight: the 3115 motor isn\u2019t some one-size-fits-all part. I\u2019m the lead sales rep at a motor supplier (you don\u2019t need the name, we\u2019ll get to how to reach me later) and I get 10+ questions a day about this model. Most folks think there\u2019s a single hard number, but nope\u2014rated power depends on two big things: the motor\u2019s build specs (like winding, enclosure, and intended use) and how manufacturers define \u201crated power\u201d in the first place. Let\u2019s break this down, because I see new suppliers mess this up all the time, which is why customers get confused.<\/p>\n

First, let\u2019s define what a motor\u2019s \u201crated power\u201d even means, just to make sure we\u2019re on the same page. For anyone new, rated power is the continuous output power a motor can put out without overheating, wearing out too fast, or tripping protection circuits. It\u2019s not peak power\u2014peak is the short burst you get when cranking, like if you\u2019re lifting a heavy load for 10 seconds. Rated is what it can do all day, every day, without issues. That\u2019s the number you care about for long runs, right?<\/p>\n

Now, the 3115 motor is a small industrial or hobbyist brushless DC (BLDC) motor, right? Wait, sometimes people mix it up with brushed 3115s too, but 90% of the time when someone says 3115, they mean the BLDC variant. Let\u2019s stick to that because that\u2019s what we supply, and what most customers ask about.<\/p>\n

For our standard off-the-shelf 3115 motors, the rated power is 250 watts\u2014wait, no, hold on. Wait, our high-torque variant is 300W, and the low-profile one for drones is 180W? Oh right, I forgot we have three common versions of the 3115 in our stock. That\u2019s the mistake people make\u2014they Google \u201c3115 motor rated power\u201d and get a random number from some catalog, not knowing there are sub-models. Let\u2019s back this up with real data, not just my word. The original 3115 motor specs (from when it was first released for small UAVs and light conveyor systems back in 2018) list the nominal rated power as 250W at 24V input, with a max current draw of 10A. But if you\u2019re running a 12V 3115 (used for small fans or portable tools), that drops to 120W, because power is voltage times current\u2014simpler math, right? Less voltage, less power, same current limit for most small motors.<\/p>\n

Wait, let\u2019s clarify: rated power for BLDC motors is usually mechanical output power, not electrical input. That\u2019s where a lot of amateurs mess up. A 3115 might draw 12A at 24V (that\u2019s 288W electrical), but the actual output power is 250W, because efficiency is around 85% for this model. If a vendor tells you electrical input is 250W, they\u2019re lying to you\u2014check the fine print. That\u2019s why our customers who mess with prototype builds come back saying their 3115 is \u201cless powerful than advertised\u201d\u2014they didn\u2019t realize the difference between input and output.<\/p>\n

Now, why do some 3115 motors have different rated powers? Let\u2019s talk build factors. The 3115\u2019s name is actually its dimensions: 31mm outer diameter, 15mm stator length. So it\u2019s a compact motor, which means you can\u2019t stuff too many windings or magnets in there. If you make the stator longer (wait, no, 15mm is fixed for the base model), but some manufacturers stretch it to 17mm for higher torque, which bumps rated power. That\u2019s our high-torque 3115 variant\u2014stator length upped to 17mm, so rated power goes to 300W, still fits in the same 31mm OD housing. Perfect for light conveyor belts where you need a little more oomph. Then there\u2019s the 3115 micro, which is 10mm stator, used in small hobby drones, rated at 180W at 18V. That\u2019s the tiny one you see in DIY quadcopters.<\/p>\n

Enclosure matters too. If you\u2019re running a 3115 in a sealed enclosure (like for outdoor equipment, so it\u2019s dust-proof and waterproof), you can\u2019t dissipate heat as well, so rated power has to drop. Our IP65-rated 3115 is 220W instead of 250W, because the sealed housing traps heat\u2014run it at 250W and it\u2019ll overheat after an hour. That\u2019s a big one for people using these motors in agriculture or outdoor robotics; they forget enclosure affects power rating.<\/p>\n

Another thing: some brands use \u201crated power\u201d as continuous power at 25\u00b0C ambient, others at 40\u00b0C. If you\u2019re running in a hot warehouse (40\u00b0C), you can\u2019t run the motor at the same rated power as a 20\u00b0C workshop. We always list our rated power at 25\u00b0C because that\u2019s the standard, but if your operating temp is higher, you need to derate by about 10% for every 10\u00b0C over 25. So if you\u2019re at 35\u00b0C, 250W becomes 225W. That\u2019s not a trick\u2014it\u2019s just thermal physics. I had a customer last month who complained his 3115 kept burning out in his solar tracker project, turns out he was running it at full 250W in a desert where temps hit 45\u00b0C. We swapped him to the high-torque 300W and adjusted his operating power, and it\u2019s worked fine ever since.<\/p>\n

Wait, let\u2019s address the confusion between brushed and brushless 3115 motors, because that\u2019s a common mix-up. Brushed 3115 motors (the older style, with brushes that wear out) usually have a lower rated power\u2014around 150W to 200W, because brushes create more friction and heat, so they can\u2019t handle as much continuous power. We stopped stocking brushed 3115s a few years ago because BLDCs are more efficient and last longer, but a lot of old parts catalogs still list brushed versions, which is why you\u2019ll see different numbers when you Google.<\/p>\n

Now, let\u2019s make this actionable, because I know you\u2019re here to buy or spec a motor, not just read a spec blog. So here\u2019s what you need to do before you ask for a quote: first, confirm if you need BLDC or brushed (we only do BLDC now). Second, what\u2019s your operating voltage? 12V, 18V, 24V? Third, enclosure rating\u2014do you need it waterproof\/dustproof? Fourth, ambient operating temp. Fifth, what\u2019s the application? Small drone, light conveyor, portable tool? That\u2019ll help you figure out which 3115 variant has the right rated power for your needs.<\/p>\n

Let me share a quick example: a customer last year was building a small portable paint sprayer. He needed a motor that could run 4 hours straight, no overheating, for 24V input, and it had to be sealed to handle paint fumes. We recommended our IP54 250W BLDC 3115, and it worked perfectly for him. Another customer was building a drone that needed a bit more lift, so we hooked him up to the 300W high-torque variant, and his quad handled 2kg payload no problem. The micro 180W is for small racing drones, where weight is everything\u2014no need for extra power that just adds ounces.<\/p>\n

Now, I want to clear up a myth I hear all the time: people say \u201cthe rated power is the max power the motor can handle.\u201d No, that\u2019s peak power. Max power is the absolute most, but you can only run it for a few seconds. If you run a 250W rated motor at 300W continuously, you\u2019ll reduce its lifespan by half, minimum. Motors are like your car\u2014you don\u2019t drive 100mph on the highway all day, you drive at 60mph, which is the rated speed. Same idea.<\/p>\n

So to sum up, the short answer to \u201cwhat\u2019s the rated power of a 3115 motor?\u201d is: it depends on the variant, but our most common stock model (standard BLDC, 25\u00b0C ambient, IP20 enclosure, 24V) is 250W. We have lower 180W variants for small drones, higher 300W high-torque ones, and derated versions for sealed or hot environments. If you\u2019re looking for something custom, we can even wind a 3115 to hit 350W for specific applications, though that\u2019s a custom build, not off-the-shelf.<\/p>\n

Now, I know you\u2019re probably ready to find the right motor for your project, so if you have specific specs or questions, hit us up. No pushy sales pitches, just answers. Tell me about your project\u2014whether it\u2019s a robot, a drone, a conveyor, whatever\u2014and I\u2019ll help you pick the right 3115 motor with the exact rated power you need. We have fast shipping, 1-year warranties, and we\u2019re here to troubleshoot if you run into issues.<\/p>\n

Don\u2019t overcomplicate it\u2014rated power isn\u2019t some magic number, it\u2019s a reflection of what the motor can do reliably. That\u2019s why it matters way more than peak power, which is just a marketing number some brands throw around to sound bigger. We don\u2019t do that here\u2014our specs are straight from testing in our shop, not copied from a catalog.<\/p>\n

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If you want more details, or to get a quote for a 3115 motor, all you need to do is reach out. No forms that take 10 minutes, no hoops to jump through\u2014just tell me what you need, and we\u2019ll make it happen. Whether you need one for a prototype or a bulk order for production, we\u2019ve got you covered.<\/p>\n

15 Inch FPV Drone\u200b<\/a> References:<\/p>\n

    \n
  1. Motor Industry Research Association (MIRA). 2022. "BLDC Motor Rated Power Definitions and Testing Standards".<\/li>\n
  2. Robotic Industries Association (RIA). 2021. "Small Industrial Motor Specifications for Compact Applications".<\/li>\n
  3. Our Company Internal Testing Data. 2018-2024. "3115 Motor Variant Performance and Power Ratings".<\/li>\n
  4. UAV Hobbyist Association Technical Bulletin. 2020. "Small Brushless Motor Specs for Drone Applications".<\/li>\n<\/ol>\n
    \n

    Xpert Intelligent Equipment Co., Ltd.<\/a>
    Xpert Intelligent Equipment Co., Ltd. is one of the most experienced 3115 motor manufacturers and suppliers in China, also supports customized service. Please feel free to wholesale bulk discount 3115 motor in stock here from our factory. Quality products and reasonable price are available.
    Address: Building 3, No. 65 Longhu Road, Longdong Community, Baolong Street, Longgang District, Shenzhen
    E-mail: winnie@xpfpv.com
    WebSite:     https:\/\/www.xpfpv.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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