Emax USA

EMAX E3 1303 Brushless Motor

$16.89 USD Sold out
KV
Notes
E3 SERIES / MICRO POWER SYSTEM
Brushless Motor Platform

EMAX E3 1303

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.

Three KV options. One 1303 platform. 5000KV for higher-voltage efficiency and larger micro props. 8000KV for aggressive 2S–3S toothpick and micro-FPV setups. 11000KV for high-RPM 1S–2S whoop and ultra-light builds.
Weight with wire6.6gUltra-light 1303 platform
System range1S–4SKV-dependent battery support
Propeller range2–3.5"KV-dependent prop selection
Framework9N12PCompact outrunner architecture
EMAX E3 1303 brushless motor brand graphic highlighting robust construction, heat resistance and rapid throttle response

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.

01 / KV Selection

Match the motor to the build.

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.

5000KV
2S–4S / 2"–3.5" props
Cinematic FPV and higher-voltage micro builds.
Cell range2S–4S
Prop range2"–3.5"
Peak current10.7A
Max power172W
Bench highlight: 255g thrust at 16V with AVAN 2.5" 3-blade; 10.74A / 171.8W.
8000KV
2S–3S / 2"–3" props
Freestyle, toothpick and high-output micro-FPV setups.
Cell range2S–3S
Prop range2"–3"
Peak current18.8A
Max power226W
Bench highlight: 306g thrust at 12V with GF3018 2-blade; 18.80A / 225.6W.
11000KV
1S–2S / 2"–3" props
Indoor practice, whoop and ultra-light high-RPM builds.
Cell range1S–2S
Prop range2"–3"
Peak current21.6A
Max power160W
Bench highlight: 245g thrust at 7.4V with GF3016 3-blade; 21.62A / 160.0W.
EMAX E3 1303 KV selection guide showing 5000KV for 2S to 4S cinematic FPV, 8000KV for 2S to 3S freestyle, and 11000KV for 1S to 2S indoor practice

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.

02 / Performance Envelope

Tested thrust across the voltage range.

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.

5000KV8.4V
159g
5000KV12V
228g
5000KV16V
255g
8000KV8V
234g
8000KV12V
306g
11000KV4.2V
131g
11000KV7.4V
245g

Bench data is configuration-dependent. Propeller, battery condition, ESC, ambient conditions and test method can change current, thrust, efficiency and RPM.

03 / Construction

Built around precision, not excess weight.

01 / SHAFT

Rugged Steel Shaft

Steel shaft construction is designed to resist bending and help reduce vibration after hard impacts.

02 / HOUSING

7075 Anodized Aluminum

A rigid lightweight housing helps resist impact deformation while keeping total motor weight to 6.6g with wire.

03 / ROTOR

One-Piece Outer Rotor

The integrated outer-rotor structure secures the magnetic assembly for consistent high-RPM operation.

04 / MAGNETS

N52SH Arc Magnets

High-temperature N52SH arc magnets help retain magnetic strength when the motor is working under load.

05 / WINDING

Single-Strand Winding

Single-strand winding is used to control internal resistance and heat in the compact 3mm stator package.

06 / BEARING

NSK Precision Bearing

Precision bearing hardware supports smooth high-speed operation while reducing unwanted vibration and noise.

Exploded EMAX E3 motor construction diagram showing steel shaft, 7075 anodized housing, one-piece outer rotor, N52SH arc magnets, single-strand winding and NSK precision bearing
Swipe horizontally to inspect the component callouts
04 / Mechanical Data

Compact 1303 geometry.

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
EMAX E3 1303 brushless motor dimensions and mounting diagram showing 17.3mm diameter, 15.3mm height, 1.5mm prop shaft and M2 mounting
EMAX E3 Series brand graphic positioning the motor platform around high performance, affordability, durability and FPV engineering
E3 Series Platform

Performance-focused engineering without unnecessary complexity.

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.

High output, compact mass.

At 6.6g with wire, the 1303 platform targets toothpick, whoop and micro-FPV aircraft where motor mass directly affects handling.

Designed for real flight loads.

Multiple KV choices, published load data and high-temperature magnetic materials make it easier to select a power system around the actual aircraft.

05 / Electrical Specifications

KV-specific operating data.

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
06 / Bench Data

Maximum-throttle propeller results.

Explore the measured bench data for each KV option, including current draw, thrust, power, efficiency and RPM across the tested propeller and voltage combinations.

5000KV Load-Test Highlights8.4V / 12V / 16V
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.

8000KV Load-Test Highlights8V / 12V
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.

11000KV Load-Test Highlights4.2V / 7.4V
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.

EMAX E3 1303 product package with motor and included mounting screws

Package contents: one EMAX E3 1303 brushless motor, five M2 × 5mm screws and three M2 × 6.5mm screws.

07 / In The Box

Mounting hardware included.

1×EMAX E3 1303 brushless motor
5×M2 × 5mm screws
3×M2 × 6.5mm screws

Bench-test note: Performance values are measured test data, not guaranteed aircraft-level performance. Current draw, thrust, efficiency and RPM vary with propeller, battery voltage and sag, ESC behavior, airflow, temperature and test equipment. Select the KV, propeller and electrical system appropriate for the complete build.

Product information

All parts are shipped fast from SYRACUSE, NEW YORK & some DROP SHIP ORDERS from San Diego, California. If there's an issue with something, please let us know and we will do our best make it right! SaltCtyRacingFPV, LLC dba "weBLEEDfpv.com" offers a (30) day return policy on all new unopened equipment, starting from the date the product(s) was delivered to the customer. Anything beyond (30) days of delivery will not be eligible for return. If the product(s) received have been opened, used or damaged, no return options will be offered. If the item is in brand new condition but requires to be repackaged, a (15%) restocking fee will be applied. The shipping cost for any unwanted product will not be refunded by SaltCtyRacingFPV "weBLEEDfpv.com" (It is recommended to choose a return shipping method with tracking).

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Please email at SaltCtyRacingFPV@gmail.com to contact us and initiate a return. Please contact us first before sending anything back. 

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Flight Controller / VTX Warranty Policy
 
At weBLEEDfpv, we are committed to providing high-quality products. However, due to the technical nature of flight controllers and VTX's the precision required for installation, our warranty policy for flight controllers is as follows:
 
1. No Warranty Post-Soldering: 
   Once any soldering has been performed on the flight controller / VTX's, we are no longer responsible for replacements, repairs, or refunds. The process of soldering can introduce various factors that may lead to damage, and we are unable to control or verify the conditions in which the soldering was conducted.
   
2. Pre-Soldering Inspection: 
   Before you begin soldering, we recommend carefully inspecting the flight controller  / VTX's for any potential issues. If any defects or issues are found prior to soldering, please contact us immediately for a replacement.
 
3. User Responsibility: 
   Soldering requires skill and experience, and improper techniques may result in damage to the flight controller, including but not limited to overheating or lifting solder pads. Please ensure you are confident in your soldering abilities before proceeding, as we cannot be held liable for any damages caused during installation.
 
4. Final Sale: 
   All flight controller sales are final once the product has been modified or soldered. We are unable to offer returns or exchanges on used or modified products.
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⚠️ FPV DIGITAL SYSTEM NOTICE

HDZero, Walksnail, VTX systems, and ultra-micro FPV electronics generate heat quickly while powered and require proper handling during setup and troubleshooting.

Bench setup without airflow/cooling can result in excessive heat buildup.

Once powered, configured, firmware updated, soldered, flown, or modified, products are considered used.

Manufacturer warranty may apply for BNF drones and electronic systems.

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Lithium Ion Battery No Acceptance Policy

For our lithium ion battery products, all sales are final. This means:

  • No Returns or Exchanges: Once your purchase is completed, we do not accept returns, exchanges, or cancellations.
  • Customer Responsibility: Please review all product specifications and details carefully before making your purchase.
  • Safety and Compliance: Due to safety standards and regulatory guidelines, we cannot process any post-sale modifications.

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Thank you for your understanding.

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