E3 Series / 13XX / E3 Series

E3 1303 Brushless Motor

A compact 1303 brushless motor for 2-3.5 inch micro FPV platforms, available in 5000KV, 8000KV and 11000KV for 1-4S systems.

5000KV8000KV11000KV

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KEY FEATURES

Designed for FPV performance tuning

A steel shaft and AL 7075 anodized housing provide a compact, impact-resistant structure for demanding micro FPV builds.
N52SH arc magnets, a one-piece outer rotor and single-strand winding support responsive power while controlling heat.
An NSK precision bearing reduces high-speed noise and vibration across the 5000KV, 8000KV and 11000KV range.
Verified load-test data covers all three KV options from 1S through 4S with 2-3.5 inch propellers.

SPECIFICATIONS

Product snapshot

Stator Size: 1303
Series: E3 Series
KV Options: 5000KV, 8000KV, 11000KV
Motor Dimensions: 17.3 x 15.3 mm
Framework: 9N12P
Battery: 1-4S, KV dependent
Propeller: 2-3.5 inch, KV dependent
Weight: 6.6 g with wire
Bearing Shaft: 2 mm
Prop Adapter Shaft: 1.5 mm
Mounting Pattern: 9 x 9 mm, M2
Lead: 80 mm 24 AWG silicone wire

VARIANT SPECIFICATIONS

KV configuration matrix

KV	Battery cells	Propeller	Idle current	Internal resistance	Peak current	Maximum power
5000KV	2-4S	2-3.5 inch	0.6 A @ 8 V	310 mOhm	10.7 A @ 4S	172 W @ 4S
8000KV	2-3S	2-3 inch	1.2 A @ 6 V	125 mOhm	18.8 A @ 3S	226 W @ 3S
11000KV	1-2S	2-3 inch	1.1 A @ 5 V	77 mOhm	21.6 A @ 2S	160 W @ 2S

ENGINEERING AND PERFORMANCE

Compact power built to last

Every critical component is engineered to maintain responsive performance under heat, high RPM and impact in 2-3.5 inch FPV aircraft.

Built robust

Resists crash-induced damage to help preserve alignment and consistent output.

Withstands heat

Controls heat-related power fading during sustained high-RPM operation.

Rapid response

Delivers crisp throttle response for lightweight micro FPV platforms.

Critical component construction

Steel shaft

Resists bending to reduce vibration and rotor contact after impact.

AL 7075 anodized housing

Combines impact resistance with a lightweight, corrosion-resistant structure.

One-piece outer rotor

Secures the magnets to reduce jitter and power loss under impact.

N52SH arc magnets

Retains magnetic strength at elevated temperatures to limit torque drop-off.

Single-strand winding

Supports efficient current delivery and heat control in a compact stator.

NSK precision bearing

Reduces high-speed noise and vibration while supporting service life.

Choose the E3 1303 KV for your aircraft

5000KV

High-voltage efficiency

2-4S power for 2-3.5 inch micro FPV platforms.

8000KV

Balanced response

2-3S power for responsive 2-3 inch micro builds.

11000KV

Maximum micro agility

1-2S power for lightweight 2-3 inch indoor and freestyle builds.

Performance without excess weight

The E3 1303 combines optimized materials and compact construction for demanding micro FPV aircraft.

A flexible micro power platform

Three KV options cover efficient 4S builds through agile 1S and 2S aircraft.

OFFICIAL GRAPHICS

Engineering drawing and specifications

E3 1303 Brushless Motor engineering drawing 1

E3 1303 Brushless Motor engineering drawing 2

E3 1303 Brushless Motor technical specifications
SPECIFICATIONS
Framework	9N12P
Length	15.3 mm
Diameter	17.3 mm
Battery cells - 5000KV	2-4S
Battery cells - 8000KV	2-3S
Battery cells - 11000KV	1-2S
Recommended propeller - 5000KV	2-3.5 inch
Recommended propeller - 8000KV / 11000KV	2-3 inch
Weight	6.6 g with wire
Prop adapter shaft	1.5 mm
Bearing shaft	2 mm
FEATURES
NSK precision bearing
Steel shaft
AL 7075 anodized housing
N52SH arc magnets
9 x 9 mm M2 mounting-hole pattern
Single-strand winding
80 mm 24 AWG silicone wire
PACKAGE INCLUDES
5 x M2 x 5 mm screws
3 x M2 x 6.5 mm screws

LOAD TEST DATA

Verified performance data

The following measurements are from EMAX load-test records. Results may vary with battery, propeller, environment, and installation conditions.

11000KV

HQ 3*1.8 (3-blade propeller) - 4.2 V

E3 1303 Brushless Motor 11000KV - HQ 3*1.8 (3-blade propeller) - 4.2 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
4.2	3.58	49	15.036	3.259	17977	50
4.2	9.31	107	39.102	2.736	25810	75
4.2	11.67	124	49.014	2.53	27799	Max

HQ 3*2 (3-blade propeller) - 4.2 V

E3 1303 Brushless Motor 11000KV - HQ 3*2 (3-blade propeller) - 4.2 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
4.2	3.88	53	16.296	3.252	16900	50
4.2	10.06	112	42.252	2.651	24192	75
4.2	12.46	129	52.332	2.465	25997	Max

HQ 3*1.6 (3-blade propeller) - 4.2 V

E3 1303 Brushless Motor 11000KV - HQ 3*1.6 (3-blade propeller) - 4.2 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
4.2	3.95	55	16.59	3.315	16802	50
4.2	10.38	115	43.596	2.638	23675	75
4.2	12.86	131	54.012	2.425	24989	Max

GF3016 (3-blade propeller) - 4.2 V

E3 1303 Brushless Motor 11000KV - GF3016 (3-blade propeller) - 4.2 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
4.2	3.68	52	15.456	3.364	17725	50
4.2	9.53	113	40.026	2.823	25436	75
4.2	11.9	131	49.98	2.621	27330	Max

AVAN 2inch (4-blade propeller) - 7.4 V

E3 1303 Brushless Motor 11000KV - AVAN 2inch (4-blade propeller) - 7.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
7.4	5.04	68	37.296	1.823	32907	50
7.4	12.86	152	95.164	1.597	47787	75
7.4	16.27	176	120.398	1.462	51177	Max

HQ 2*2.2 (4-blade propeller) - 7.4 V

E3 1303 Brushless Motor 11000KV - HQ 2*2.2 (4-blade propeller) - 7.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
7.4	5.59	75	41.366	1.813	30693	50
7.4	14.33	157	106.042	1.481	44270	75
7.4	17.87	178	132.238	1.346	47339	Max

HQ 2.2*1.6 (3-blade propeller) - 7.4 V

E3 1303 Brushless Motor 11000KV - HQ 2.2*1.6 (3-blade propeller) - 7.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
7.4	5.25	82	38.85	2.111	32065	50
7.4	13.4	179	99.16	1.805	46557	75
7.4	16.77	206	124.098	1.66	49904	Max

HQ 2.5*1.9 (3-blade propeller) - 7.4 V

E3 1303 Brushless Motor 11000KV - HQ 2.5*1.9 (3-blade propeller) - 7.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
7.4	6.9	102	51.06	1.998	25182	50
7.4	17.47	203	129.278	1.57	36394	75
7.4	21.07	221	155.918	1.417	38084	Max

HQ 3*1.8 (3-blade propeller) - 7.4 V

E3 1303 Brushless Motor 11000KV - HQ 3*1.8 (3-blade propeller) - 7.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
7.4	6.71	103	49.654	2.074	25643	50
7.4	17.46	215	129.204	1.664	35792	75
7.4	21.2	236	156.88	1.504	37510	Max

GF3016 (3-blade propeller) - 7.4 V

E3 1303 Brushless Motor 11000KV - GF3016 (3-blade propeller) - 7.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
7.4	6.92	110	51.208	2.148	25015	50
7.4	17.93	224	132.682	1.688	35412	75
7.4	21.62	245	159.988	1.531	36892	Max

GF3018 (2-blade propeller) - 7.4 V

E3 1303 Brushless Motor 11000KV - GF3018 (2-blade propeller) - 7.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
7.4	5.96	108	44.104	2.449	27858	50
7.4	16.41	218	121.434	1.795	39263	75
7.4	20.18	241	149.332	1.614	41195	Max

5000KV

HQ T76 (3-blade propeller) - 8.4 V

E3 1303 Brushless Motor 5000KV - HQ T76 (3-blade propeller) - 8.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8.4	1.15	46	9.66	4.762	11482	40
8.4	2.8	84	23.52	3.571	15532	60
8.4	4.82	119	40.488	2.939	18452	80
8.4	7.71	153	64.764	2.362	20962	Max

HQ 3.5*2.5 (3-blade propeller) - 8.4 V

E3 1303 Brushless Motor 5000KV - HQ 3.5*2.5 (3-blade propeller) - 8.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8.4	1.13	45	9.492	4.741	10655	40
8.4	2.79	87	23.436	3.712	14656	60
8.4	4.82	123	40.488	3.038	17332	80
8.4	7.65	159	64.26	2.474	19607	Max

HQ DT46 (4-blade propeller) - 8.4 V

E3 1303 Brushless Motor 5000KV - HQ DT46 (4-blade propeller) - 8.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8.4	1.15	44	9.66	4.555	10611	40
8.4	2.83	81	23.772	3.407	14369	60
8.4	4.92	113	41.328	2.734	16988	80
8.4	7.73	144	64.932	2.218	19079	Max

GF3520 (3-blade propeller) - 8.4 V

E3 1303 Brushless Motor 5000KV - GF3520 (3-blade propeller) - 8.4 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8.4	0.99	42	8.316	5.051	11651	40
8.4	2.43	81	20.412	3.968	15906	60
8.4	4.24	118	35.616	3.313	18996	80
8.4	6.93	158	58.212	2.714	21727	Max

HQ 2.5*2.5 (3-blade propeller) - 12 V

E3 1303 Brushless Motor 5000KV - HQ 2.5*2.5 (3-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	1.51	62	18.12	3.422	17589	40
12	3.21	108	38.52	2.804	23096	60
12	5.59	153	67.08	2.281	27414	80
12	9.18	198	110.16	1.797	31125	Max

HQ 2.5*2.1 (3-blade propeller) - 12 V

E3 1303 Brushless Motor 5000KV - HQ 2.5*2.1 (3-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	1.32	60	15.84	3.788	18769	40
12	2.81	106	33.72	3.144	24783	60
12	4.95	152	59.4	2.559	29677	80
12	8.42	206	101.04	2.039	34253	Max

AVAN 2.5inch (3-blade propeller) - 12 V

E3 1303 Brushless Motor 5000KV - AVAN 2.5inch (3-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	1.28	53	15.36	3.451	19130	40
12	2.66	95	31.92	2.976	25374	60
12	4.71	141	56.52	2.495	30661	80
12	8.09	195	97.08	2.009	35845	Max

GF3016 (3-blade propeller) - 12 V

E3 1303 Brushless Motor 5000KV - GF3016 (3-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	1.29	62	15.48	4.005	19019	40
12	2.7	113	32.4	3.488	25232	60
12	4.8	166	57.6	2.882	30240	80
12	8.31	228	99.72	2.286	35179	Max

HQ 3*1.8 (3-blade propeller) - 12 V

E3 1303 Brushless Motor 5000KV - HQ 3*1.8 (3-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	1.28	58	15.36	3.776	19231	40
12	2.67	105	32.04	3.277	25442	60
12	4.72	155	56.64	2.737	30556	80
12	8.15	216	97.8	2.209	35365	Max

HQ T2*2.2 (4-blade propeller) - 16 V

E3 1303 Brushless Motor 5000KV - HQ T2*2.2 (4-blade propeller) - 16 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
16	1.27	54	20.32	2.657	26305	40
16	2.74	99	43.84	2.258	35096	60
16	5.21	151	83.36	1.811	42990	80
16	9	210	144	1.458	50036	Max

HQ 2.2*1.6 (3-blade propeller) - 16 V

E3 1303 Brushless Motor 5000KV - HQ 2.2*1.6 (3-blade propeller) - 16 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
16	1.16	61	18.56	3.287	27313	40
16	2.47	110	39.52	2.783	36257	60
16	4.75	169	76	2.224	44606	80
16	8.33	239	133.28	1.793	52771	Max

HQ 2.2*2 (3-blade propeller) - 16 V

E3 1303 Brushless Motor 5000KV - HQ 2.2*2 (3-blade propeller) - 16 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
16	1.51	69	24.16	2.856	24736	40
16	3.28	122	52.48	2.325	32758	60
16	6.02	180	96.32	1.869	39543	80
16	10.06	236	160.96	1.466	45190	Max

AVAN 2inch (4-blade propeller) - 16 V

E3 1303 Brushless Motor 5000KV - AVAN 2inch (4-blade propeller) - 16 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
16	1.17	47	18.72	2.511	27278	40
16	2.44	89	39.04	2.28	36709	60
16	4.66	140	74.56	1.878	45218	80
16	8.3	201	132.8	1.514	53276	Max

AVAN 2.5inch (3-blade propeller) - 16 V

E3 1303 Brushless Motor 5000KV - AVAN 2.5inch (3-blade propeller) - 16 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
16	1.7	82	27.2	3.015	23623	40
16	3.67	141	58.72	2.401	30947	60
16	6.56	201	104.96	1.915	36563	80
16	10.74	255	171.84	1.484	40879	Max

8000KV

HQ 2.2*2 (3-blade propeller) - 8 V

E3 1303 Brushless Motor 8000KV - HQ 2.2*2 (3-blade propeller) - 8 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8	1.8	49	14.4	3.403	21328	40
8	3.9	88	31.2	2.821	27889	60
8	7.2	131	57.6	2.274	33826	80
8	12.65	183	101.2	1.808	39832	Max

GF3016 (3-blade propeller) - 8 V

E3 1303 Brushless Motor 8000KV - GF3016 (3-blade propeller) - 8 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8	2.08	67	16.64	4.026	19609	40
8	4.63	120	37.04	3.24	25797	60
8	8.36	175	66.88	2.617	30848	80
8	14.28	234	114.24	2.048	35464	Max

GF3018 (2-blade propeller) - 8 V

E3 1303 Brushless Motor 8000KV - GF3018 (2-blade propeller) - 8 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8	1.86	61	14.88	4.099	20856	40
8	4.01	109	32.08	3.398	27594	60
8	7.4	162	59.2	2.736	33408	80
8	13.05	224	104.4	2.146	39202	Max

HQ 3*1.8 (3-blade propeller) - 8 V

E3 1303 Brushless Motor 8000KV - HQ 3*1.8 (3-blade propeller) - 8 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8	2.02	62	16.16	3.837	19904	40
8	4.55	113	36.4	3.104	26212	60
8	8.26	167	66.08	2.527	31434	80
8	14.18	229	113.44	2.019	36407	Max

HQ 3*2 (3-blade propeller) - 8 V

E3 1303 Brushless Motor 8000KV - HQ 3*2 (3-blade propeller) - 8 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
8	2.24	68	17.92	3.795	19069	40
8	5.04	122	40.32	3.026	24995	60
8	8.98	176	71.84	2.45	29586	80
8	14.99	232	119.92	1.935	33632	Max

HQ 2*2.2 (4-blade propeller) - 12 V

E3 1303 Brushless Motor 8000KV - HQ 2*2.2 (4-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	2.29	71	27.48	2.584	29431	40
12	5.64	131	67.68	1.936	39915	60
12	10.27	190	123.24	1.542	47769	80
12	17.09	248	205.08	1.209	54307	Max

HQ 2.2*1.6 (3-blade propeller) - 12 V

E3 1303 Brushless Motor 8000KV - HQ 2.2*1.6 (3-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	2.06	73	24.72	2.953	30490	40
12	5.14	143	61.68	2.318	41574	60
12	9.52	214	114.24	1.873	50181	80
12	16.09	288	193.08	1.492	57677	Max

AVAN 2inch (4-blade propeller) - 12 V

E3 1303 Brushless Motor 8000KV - AVAN 2inch (4-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	1.94	60	23.28	2.577	31085	40
12	4.83	122	57.96	2.105	42680	60
12	9.12	184	109.44	1.681	51616	80
12	15.88	244	190.56	1.28	59098	Max

GF3018 (2-blade propeller) - 12 V

E3 1303 Brushless Motor 8000KV - GF3018 (2-blade propeller) - 12 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
12	2.78	106	33.36	3.177	27445	40
12	6.6	186	79.2	2.348	35799	60
12	11.88	253	142.56	1.775	41592	80
12	18.8	306	225.6	1.356	45698	Max

APPLICATIONS

Recommended use

2-3.5 inch micro FPVindoor and outdoor micro buildslightweight freestylecompact cinematic platforms