The EMAX E3 1303 is an ultra-lightweight micro brushless motor engineered for 2"–3.5" FPV drones, toothpick frames and whoop platforms. A 9N12P architecture, N52SH arc magnets, NSK precision bearings and a 7075 aluminum anodized structure deliver a compact 6.6g power system across 5000KV, 8000KV and 11000KV options for builds spanning 1S through 4S.
Built for sustained micro-FPV performance. The E3 1303 combines a rigid lightweight structure, high-temperature magnetic materials and a compact high-RPM power system intended to maintain responsive output under demanding flight loads.
The E3 1303 platform covers a wide micro-FPV operating envelope. Peak-current and maximum-power ratings below come from the supplied EMAX specification data; tested thrust figures are the highest values observed in the supplied bench-test sheets.
Use case is a starting point, not a hard limit. Higher KV, larger propellers and higher voltage all increase motor load. Final motor, propeller, ESC and battery selection should be validated against the bench data and the thermal conditions of the complete aircraft.
Each bar shows the highest measured maximum-throttle thrust among the tested propellers at that supply voltage. Bars share a 306g scale so the three KV ranges can be compared visually.
Bench data is configuration-dependent. Propeller, battery condition, ESC, ambient conditions and test method can change current, thrust, efficiency and RPM.
Steel shaft construction is designed to resist bending and help reduce vibration after hard impacts.
A rigid lightweight housing helps resist impact deformation while keeping total motor weight to 6.6g with wire.
The integrated outer-rotor structure secures the magnetic assembly for consistent high-RPM operation.
High-temperature N52SH arc magnets help retain magnetic strength when the motor is working under load.
Single-strand winding is used to control internal resistance and heat in the compact 3mm stator package.
Precision bearing hardware supports smooth high-speed operation while reducing unwanted vibration and noise.
| Motor model | EMAX E3 1303 |
|---|---|
| Framework | 9N12P |
| Motor dimensions | Ø17.3 × 15.3mm |
| Stator height | 3mm |
| Weight with wire | 6.6g |
| Bearing shaft | Ø2mm |
| Prop adapter shaft | Ø1.5mm |
| Motor leads | 80mm 24AWG silicone wire |
| Mounting | 4 × M2, Ø9mm bolt-circle callout |
| KV options | 5000KV / 8000KV / 11000KV |
The E3 Series is designed around practical materials, manufacturing efficiency and durability for FPV pilots who need repeatable power without moving into an oversized motor platform.
At 6.6g with wire, the 1303 platform targets toothpick, whoop and micro-FPV aircraft where motor mass directly affects handling.
Multiple KV choices, published load data and high-temperature magnetic materials make it easier to select a power system around the actual aircraft.
Use the KV option that matches your intended cell count and propeller load. Values below are from the supplied EMAX specification sheet.
| KV | Cells | Propellers | Idle Current | Resistance | Peak Current | Max Power |
|---|---|---|---|---|---|---|
| 5000KV | 2S–4S | 2"–3.5" | 0.6A @ 8V | 310mΩ | 10.7A @ 4S | 172W @ 4S |
| 8000KV | 2S–3S | 2"–3" | 1.2A @ 6V | 125mΩ | 18.8A @ 3S | 226W @ 3S |
| 11000KV | 1S–2S | 2"–3" | 1.1A @ 5V | 77mΩ | 21.6A @ 2S | 160W @ 2S |
Explore the measured bench data for each KV option, including current draw, thrust, power, efficiency and RPM across the tested propeller and voltage combinations.
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 8.4V | HQ T76, 3-blade | 7.71A | 153g | 64.8W | 2.36g/W | 20,962 |
| 8.4V | HQ 3.5×2.5, 3-blade | 7.65A | 159g | 64.3W | 2.47g/W | 19,607 |
| 8.4V | HQ DT46, 4-blade | 7.73A | 144g | 64.9W | 2.22g/W | 19,079 |
| 8.4V | GF3520, 3-blade | 6.93A | 158g | 58.2W | 2.71g/W | 21,727 |
| 12V | HQ 2.5×2.5, 3-blade | 9.18A | 198g | 110.2W | 1.80g/W | 31,125 |
| 12V | HQ 2.5×2.1, 3-blade | 8.42A | 206g | 101.0W | 2.04g/W | 34,253 |
| 12V | AVAN 2.5", 3-blade | 8.09A | 195g | 97.1W | 2.01g/W | 35,845 |
| 12V | GF3016, 3-blade | 8.31A | 228g | 99.7W | 2.29g/W | 35,179 |
| 12V | HQ 3×1.8, 3-blade | 8.15A | 216g | 97.8W | 2.21g/W | 35,365 |
| 16V | HQ T2×2.2, 4-blade | 9.00A | 210g | 144.0W | 1.46g/W | 50,036 |
| 16V | HQ 2.2×1.6, 3-blade | 8.33A | 239g | 133.3W | 1.79g/W | 52,771 |
| 16V | HQ 2.2×2, 3-blade | 10.06A | 236g | 161.0W | 1.47g/W | 45,190 |
| 16V | AVAN 2", 4-blade | 8.30A | 201g | 132.8W | 1.51g/W | 53,276 |
| 16V | AVAN 2.5", 3-blade | 10.74A | 255g | 171.8W | 1.48g/W | 40,879 |
Rows shown are the maximum-throttle entries from the supplied 5000KV load-test workbook.
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 8V | HQ 2.2×2, 3-blade | 12.65A | 183g | 101.2W | 1.81g/W | 39,832 |
| 8V | GF3016, 3-blade | 14.28A | 234g | 114.2W | 2.05g/W | 35,464 |
| 8V | GF3018, 2-blade | 13.05A | 224g | 104.4W | 2.15g/W | 39,202 |
| 8V | HQ 3×1.8, 3-blade | 14.18A | 229g | 113.4W | 2.02g/W | 36,407 |
| 8V | HQ 3×2, 3-blade | 14.99A | 232g | 119.9W | 1.93g/W | 33,632 |
| 12V | HQ 2×2.2, 4-blade | 17.09A | 248g | 205.1W | 1.21g/W | 54,307 |
| 12V | HQ 2.2×1.6, 3-blade | 16.09A | 288g | 193.1W | 1.49g/W | 57,677 |
| 12V | AVAN 2", 4-blade | 15.88A | 244g | 190.6W | 1.28g/W | 59,098 |
| 12V | GF3018, 2-blade | 18.80A | 306g | 225.6W | 1.36g/W | 45,698 |
Rows shown are the maximum-throttle entries from the supplied 8000KV load-test workbook.
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 4.2V | HQ 3×1.8, 3-blade | 11.67A | 124g | 49.0W | 2.53g/W | 27,799 |
| 4.2V | HQ 3×2, 3-blade | 12.46A | 129g | 52.3W | 2.47g/W | 25,997 |
| 4.2V | HQ 3×1.6, 3-blade | 12.86A | 131g | 54.0W | 2.43g/W | 24,989 |
| 4.2V | GF3016, 3-blade | 11.90A | 131g | 50.0W | 2.62g/W | 27,330 |
| 7.4V | AVAN 2", 4-blade | 16.27A | 176g | 120.4W | 1.46g/W | 51,177 |
| 7.4V | HQ 2×2.2, 4-blade | 17.87A | 178g | 132.2W | 1.35g/W | 47,339 |
| 7.4V | HQ 2.2×1.6, 3-blade | 16.77A | 206g | 124.1W | 1.66g/W | 49,904 |
| 7.4V | HQ 2.5×1.9, 3-blade | 21.07A | 221g | 155.9W | 1.42g/W | 38,084 |
| 7.4V | HQ 3×1.8, 3-blade | 21.20A | 236g | 156.9W | 1.50g/W | 37,510 |
| 7.4V | GF3016, 3-blade | 21.62A | 245g | 160.0W | 1.53g/W | 36,892 |
| 7.4V | GF3018, 2-blade | 20.18A | 241g | 149.3W | 1.61g/W | 41,195 |
Rows shown are the maximum-throttle entries from the supplied 11000KV load-test workbook.
Package contents: one EMAX E3 1303 brushless motor, five M2 × 5mm screws and three M2 × 6.5mm screws.
