Product overview
The T-MOTOR AT4120 Long Shaft KV250 is a brushless DC propulsion component presented for VTOL and fixed-wing airplane applications. Procurement should specify the KV250 winding explicitly because the same page also contains KV500 and KV560 specifications. The selected KV250 carries a 12S LiPo rating and a published maximum power of 2100W qualified for 180 seconds. The general description also discusses 5S and 6S aircraft applications, which should be read separately from the KV250 specification.
For installation planning, the manufacturer lists the KV250 motor at Φ50*69mm and 304g including cable, with 100mm enameled-wire leads and a 12N14P configuration. These are published configuration values to confirm for the selected motor. Its long shaft is intended to increase installation flexibility with propellers and accessories. T-MOTOR recommends an AT115A ESC and FS15*8 folding propellers, providing a starting point for selecting the surrounding propulsion components.
The supplied package comprises one AT4120 motor and one hardware pack, making this a motor purchase rather than a complete flight platform or airframe kit. The recommended ESC and propellers are separate from that packing list. Published peak current and maximum power have 180-second qualifications and should retain those conditions in procurement documents. Bench data are reference values; motor temperature means surface temperature after three minutes at full throttle, and comparison with other motor types is discouraged.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | T-MOTOR AT4120 Long Shaft KV250 motorSelected product identity: Long Shaft KV250; other winding variants appear in the same manufacturer's table. |
| Product purpose | Long-shaft motor for VTOL and fixed-wing airplane applications.Application; aircraft suitability requires configuration-specific assessment. |
| Motor type | Brushless DC motor. |
| KV250 weight including cable | 304g |
| Motor dimensions | Φ50*69mmPublished for Long Shaft KV250, KV500 and KV560. |
| KV250 internal resistance | 76mΩLong Shaft KV250 configuration. |
| Motor configuration | 12N14PPublished for Long Shaft KV250, KV500 and KV560. |
| KV250 rated voltage | 12S LiPoLong Shaft KV250; published LiPo battery rating. |
| KV250 idle current | 1.0ALong Shaft KV250; idle current specified at 10V. |
| KV250 peak current | 45ALong Shaft KV250; published 180-second peak-current qualification. |
| KV250 maximum power | 2100WLong Shaft KV250; published 180-second maximum-power qualification. |
| Specification-table recommendation | /The specification table uses '/' for each winding variant; separate accessory recommendations appear in the description. |
| KV500 weight including cable | 305gLong Shaft KV500 alternative shown on the same page; not the selected KV250 configuration. |
| KV500 internal resistance | 21mΩLong Shaft KV500 alternative shown on the same page. |
| KV500 and KV560 rated voltage | 6S LiPoPublished LiPo battery rating for Long Shaft KV500 and KV560 alternatives. |
| KV500 idle current | 2.0ALong Shaft KV500; idle current specified at 10V. |
| KV500 peak current | 75ALong Shaft KV500; published 180-second peak-current qualification. |
| KV500 maximum power | 1700WLong Shaft KV500; published 180-second maximum-power qualification. |
| KV560 weight including cable | 300gLong Shaft KV560 alternative shown on the same page; not the selected KV250 configuration. |
| KV560 internal resistance | 16mΩLong Shaft KV560 alternative shown on the same page. |
| KV560 idle current | 2.4ALong Shaft KV560; idle current specified at 10V. |
| KV560 peak current | 80ALong Shaft KV560; published 180-second peak-current qualification. |
| KV560 maximum power | 1800WLong Shaft KV560; published 180-second maximum-power qualification. |
| Lead enameled wire | 100mmPublished for all three long-shaft winding variants. |
| Physical architecture | Long-shaft design intended to provide installation flexibility.Manufacturer describes installation flexibility; confirm the actual propeller, accessory and mounting arrangement. |
| Supplied configuration | One T-MOTOR AT4120 motor and one hardware pack.Published packing list identifies a motor component package, rather than a flight platform or airframe kit. |
| Recommended integration components | T-Motor AT115A ESC and T-Motor FS15*8 folding propellers.Manufacturer recommendations; these accessories are not listed in the supplied packing list. |
| Published aircraft application envelope | 5S and 6S LiPo applications: 3D models up to 3500g and sailplanes up to 5000g.General AT4120 application description for 5S and 6S LiPo operation; do not substitute it for the selected KV250's 12S specification. |
| Test-data limitations | Manufacturer bench-test reference data with a specified temperature measurement condition.Temperature refers to motor surface temperature after three minutes at full throttle; bench data are reference values and comparison with other motor types is not recommended. |
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