50*74mm
12N14P
220℃
6mm
350g
＞1000h
| AT4125 Basic Data | |
| Parameter:Long Shaft KV250 | Weight (with leads):350g/355g |
| Test Model:KV250/KV540 | Phase-to-phase Internal Resistance:68m/14m |
| Motor Dimensions:50*74mm | Slot-pole Configuration:12N14P |
| Lead Specification:100mm | Rated Operating Voltage (Lipo):12S |
| Shaft Diameter:6mm | Maximum Current (180s):50A/85A |
| No-load Current (10V):1.0A/2.6A | Maximum Continuous Power:365W/446W |
| MODEL | KV Value | maximum power | Maximum current | pull | Efficiency | Applicable blades | Number of batteries | Adapt to electric adjustment | |
| BGS-FW4125 | KV | W | A | g | g/W | / | S | A | |
| 250 | 1744.46 | 39.92 | 5838 | 3.35 | APC15*8 | 6 | 40 | ||
| 250 | 2049.62 | 47.04 | 7053 | 3.44 | APC16*8 | 6 | 40 | ||
| 540 | 1554.08 | 72.77 | 5537 | 3.56 | APC15*8 | 4 | 40 | ||
| 540 | 1718.70 | 81.72 | 6618 | 3.85 | APC16*8 | 4 | 40 | ||
| Model | accelerator | Voltage | Pulling Force | Torque | Current | speed | Power | Efficiency | Motor temperature |
| BGS-FW4125 KV250 APC15*8 | % | V | g | N.m | A | rpm | W | g/W | ℃ |
| 40.% | 44.37 | 1027 | 0.210 | 2.76 | 3922 | 122.38 | 8.39 | 78 | |
| 45.% | 44.34 | 1242 | 0.254 | 3.42 | 4319 | 151.62 | 8.19 | ||
| 50.% | 44.31 | 1631 | 0.334 | 5.02 | 4911 | 222.62 | 7.33 | ||
| 55.% | 44.28 | 2042 | 0.419 | 6.78 | 5453 | 300.43 | 6.80 | ||
| 60.% | 44.25 | 2433 | 0.502 | 8.71 | 5931 | 385.57 | 6.31 | ||
| 65.% | 44.20 | 2791 | 0.579 | 10.86 | 6368 | 479.91 | 5.82 | ||
| 70.% | 44.16 | 3213 | 0.669 | 13.22 | 6767 | 583.56 | 5.51 | ||
| 75.% | 44.10 | 3719 | 0.779 | 16.36 | 7237 | 721.40 | 5.15 | ||
| 80.% | 44.04 | 4220 | 0.893 | 19.79 | 7703 | 871.73 | 4.84 | ||
| 90.% | 43.90 | 5078 | 1.153 | 28.10 | 8406 | 1233.40 | 4.12 | ||
| 100.% | 43.70 | 5838 | 1.473 | 39.92 | 9145 | 1744.46 | 3.35 | ||
| BGS-FW4125 KV250 APC16*8 | 40.% | 44.35 | 1253 | 0.261 | 3.27 | 3863 | 145.16 | 8.63 | 96 |
| 45.% | 44.33 | 1527 | 0.320 | 4.11 | 4249 | 182.31 | 8.37 | ||
| 50.% | 44.30 | 1983 | 0.414 | 5.86 | 4815 | 259.41 | 7.65 | ||
| 55.% | 44.26 | 2469 | 0.517 | 8.26 | 5373 | 365.43 | 6.76 | ||
| 60.% | 44.21 | 2935 | 0.617 | 10.58 | 5800 | 467.56 | 6.28 | ||
| 65.% | 44.16 | 3400 | 0.722 | 13.15 | 6234 | 580.61 | 5.86 | ||
| 70.% | 44.12 | 3933 | 0.843 | 16.13 | 6643 | 711.69 | 5.53 | ||
| 75.% | 44.05 | 4476 | 0.963 | 19.73 | 7058 | 869.19 | 5.15 | ||
| 80.% | 43.97 | 5042 | 1.102 | 24.10 | 7500 | 1059.85 | 4.76 | ||
| 90.% | 43.80 | 6182 | 1.383 | 33.50 | 8169 | 1467.45 | 4.21 | ||
| 100.% | 43.58 | 7053 | 1.723 | 47.04 | 8831 | 2049.62 | 3.44 | ||
| BGS-FW4125 KV540 APC15*8 | 40.% | 22.38 | 1674 | 0.341 | 11.21 | 4943 | 250.81 | 6.68 | 84 |
| 45.% | 22.34 | 1929 | 0.395 | 13.58 | 5313 | 303.32 | 6.36 | ||
| 50.% | 22.29 | 2205 | 0.452 | 16.21 | 5650 | 361.27 | 6.10 | ||
| 55.% | 22.24 | 2492 | 0.513 | 19.14 | 5978 | 425.84 | 5.85 | ||
| 60.% | 22.18 | 2864 | 0.595 | 23.20 | 6382 | 514.39 | 5.57 | ||
| 65.% | 22.10 | 3233 | 0.676 | 27.69 | 6806 | 611.87 | 5.28 | ||
| 70.% | 22.02 | 3655 | 0.766 | 32.79 | 7193 | 722.03 | 5.06 | ||
| 75.% | 21.93 | 4081 | 0.863 | 38.58 | 7571 | 845.87 | 4.82 | ||
| 80.% | 21.80 | 4541 | 0.970 | 45.80 | 7963 | 998.46 | 4.55 | ||
| 85.% | 21.68 | 4951 | 1.072 | 52.89 | 8301 | 1146.84 | 4.32 | ||
| 90.% | 21.52 | 5163 | 1.213 | 62.57 | 8577 | 1346.88 | 3.83 | ||
| 100.% | 21.36 | 5537 | 1.344 | 72.77 | 8879 | 1554.08 | 3.56 | ||
| BGS-FW4125 KV540 APC16*8 | 40.% | 22.20 | 1798 | 0.378 | 11.43 | 4637 | 253.85 | 7.08 | 97 |
| 45.% | 22.16 | 2069 | 0.437 | 13.89 | 4970 | 307.76 | 6.72 | ||
| 50.% | 22.11 | 2380 | 0.502 | 16.79 | 5309 | 371.33 | 6.41 | ||
| 55.% | 22.05 | 2771 | 0.585 | 20.26 | 5686 | 446.90 | 6.20 | ||
| 60.% | 21.96 | 3241 | 0.694 | 25.87 | 6118 | 568.11 | 5.70 | ||
| 65.% | 21.86 | 3738 | 0.804 | 31.71 | 6522 | 693.11 | 5.39 | ||
| 70.% | 21.77 | 4145 | 0.896 | 37.21 | 6873 | 810.01 | 5.12 | ||
| 75.% | 21.66 | 4635 | 1.011 | 44.10 | 7239 | 955.01 | 4.85 | ||
| 80.% | 21.51 | 5207 | 1.149 | 52.74 | 7597 | 1134.53 | 4.59 | ||
| 90.% | 21.23 | 6054 | 1.370 | 69.58 | 8206 | 1477.35 | 4.10 | ||
| 100.% | 21.03 | 6618 | 1.528 | 81.72 | 8492 | 1718.70 | 3.85 |
The 4125 Brushless Outrunner Motor is engineered for large fixed-wing UAVs, delivering exceptional power, high efficiency, and reliable performance for long-endurance missions. Available in 250KV and 540KV (customizable), it provides up to 7 kg of maximum thrust when paired with the recommended propeller and ESC. Optimized for 6–12S LiPo battery systems, it features a high-efficiency magnetic circuit, precision-balanced rotor, and premium bearings to ensure smooth operation, low vibration, and extended service life. Ideal for fixed-wing drones, VTOL UAVs, mapping aircraft, surveillance platforms, cargo UAVs, and industrial long-range UAV applications. Custom KV ratings, shaft dimensions, cable length, and mounting configurations are available to support OEM and ODM requirements.
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