Quick Answer
The T-Motor V3120 is sold in 500KV and 700KV versions, not 900KV. Choose 500KV for the higher-voltage, lower-RPM end of a heavy cinematic build; choose 700KV when the design needs more RPM per volt. For a genuine 900KV option, move to a different motor rather than pretending KV is interchangeable.
Why Everyone Is Searching for a 900KV V3120
Our Google Search Console data exposed an unusually specific mismatch: “t-motor 3120 900kv” generated 430 impressions in 90 days, yet the T-Motor V3120 we stock has only 500KV and 700KV variants. T-Motor’s current product page confirms the same two choices.
The likely source of confusion is that 900KV is a real rating in this size class. Our Hobbywing XRotor 3115 is 900KV, but it is a different stator and motor. If a parts list calls for “V3120 900KV”, stop and check the original build specification before ordering.
500KV vs 700KV: The Numbers That Matter
| Specification | V3120 500KV | V3120 700KV |
|---|---|---|
| Listed battery range | 6-12S | 4-8S |
| Listed propeller range | 9-11 inches | 9-11 inches |
| Weight with cable | 146.7g | 148.1g |
| Internal resistance | 76.35mΩ | 40.59mΩ |
| Listed maximum power | 3242W | 2453W |
| Configuration | 12N14P | 12N14P |
KV is unloaded RPM per volt, not a power score. A 700KV motor tries to turn faster at the same voltage, so voltage, propeller and payload must be treated as one system. The V3120 family uses a 37.2 × 56.1mm body, 5mm shaft, 16AWG 250mm leads, NMB bearings and high-temperature-resistant windings.
We would start with 500KV when the build brief prioritises high pack voltage, heavy payload and controlled response. We would choose 700KV only when the complete propulsion plan calls for the higher KV. Do not copy an 11-inch prop from one voltage into the other setup without checking T-Motor’s load data, ESC rating and current headroom.
What We Would Actually Buy
For a new 10 or 11-inch cinelifter planned around the V3120, our default is 500KV because it leaves the clearer route towards a higher-voltage power system. For a design that genuinely specifies 700KV, buy that exact winding rather than compensating with throttle limits.
The BrotherHobby Avenger 3120 is the direct same-size alternative with 500KV and 700KV choices. If the requirement is truly 900KV, read our XRotor 3115 explanation and compare the whole propulsion system. Our broader motor selection guide explains why stator volume matters alongside KV; the current range is in our brushless motors collection.
FAQ
Q: Does T-Motor make a V3120 900KV?
A: Not in the current V3120 range we could verify. T-Motor lists 500KV and 700KV versions.
Q: Is 700KV more powerful than 500KV?
A: Not automatically. It has a higher unloaded RPM per volt, while delivered thrust and power depend on voltage, propeller, current and cooling.
Q: Can I use the V3120 on an 8-inch drone?
A: T-Motor markets the family for 8-11-inch cinematic drones, but our variant data lists 9-11-inch props. For an 8-inch build, verify the exact prop and voltage against the manufacturer’s test data before buying.