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D126L165 Waterproof 72V 96V 140V 57kv 40kw Electric Motor for Marine Engine

As the ultra-low Kv variant in the series, the D126L165-57Kv motor is designed for maximum torque per amp and optimal efficiency at high system voltages. Delivering a peak torque of 66 N·m and 40 kW of power, with speeds up to 8,618 RPM, it is perfectly suited for large-scale, high-voltage marine propulsion systems requiring exceptional low-end torque and extended operational range, such as in commercial electric boats and long-range cruising vessels.
Sophisticated water-cooling guarantees thermal stability, making it a cornerstone for reliable, high-performance electric marine powertrains.

• Peak Power: 40 kW • Peak Torque: 66 N·m • Max Speed: 8,618 RPM
• Waterproof Rating: IP68 • Weight: 8.0 kg

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System Types:
All
Kv:
<100
Controller Type:
Sensorless
Maximum Voltage:
60V
Maximum Continuous Current:
< 120A

Marine Motor Electric Motor Waterproof Motor Low Torque Motor

Features

Specification

Dyno Tested Data

Dimension

Key Features

Robust & durable: Outer shell in black anodizing aluminum alloy, improve conductive heat transfer, prevent corrosion and oxidation
High performance: Our motors provide extremely high torques with a minimum of power consumption.
Silient: low-cogging electro-magnetic design and dynamically balanced rotor, extremely silient and smooth operation.
Efficiency: Our energy-efficient motors save energy and costs, efficiency up to 92%.
Highter on power to weight ratio and torque to weight ratio.
Compact: High efficiency and high power density realized in a compact design.
Ball-bearing construction: Double seal ball bearings with moisture resistant grease for long life.
Cooling solution: water-cooling & Air-Cooling.
Shaft in SS316 Stainless Steel: withstand redial/axile stree,and work in the sea water against corrosion.

Item	Specification
Model	D126L165-57
Voltage Range	14-36S (50-151.2V)
Max. Free Speed	8,618 RPM
Speed Constant (Kv)	57
Torque Constant (Kt)	0.203 N·m/A
No-load Current (at 8.4V)	2.3 A
Max. Output Power	40.0 kW
Peak Torque	66.0 N·m
Peak Current	580 A
Cont. Current	220.0 A
Max. Efficiency	92.00%
Weight	8.00 kg
Construction	12N/10P
Cooling Solution	Water Cooling
Dimensions (Dia. x Length)	Ø126 x L165 mm
Max. Working Temperature	120°C
Insulation Voltage & Leak Current	AC1000V/10MA/3S
Extension Shaft	Ø20 x L30 mm
Lead Wires Extension	2AWG x 300mm
Service Life	8,000 Hrs

D126L200 at 50Kv
Item No.	C_Voltage (V)	C_Current (A)	C_Input Power(W)	M_Voltage (V)	M_Current (A)	M_Input Power(W)	M_Efficiency (%)	M_Speed (rpm)	M_Torque (N*m)	M_Output Power(W)	Synthesis Efficiency(%)
0	48.869999	27.799999	1335.699951	36.740002	23.139999	1324.380005	89.803856	2299	4.939995	1189.34436	89.042778
1	48.740002	52.139999	2521.030029	36.439999	43.380001	2500.939941	92.858543	2200	10.079995	2322.336426	92.118553
2	48.639999	74.860001	3600.449951	36.200001	63.279999	3569.199951	93.199341	2112	15.039995	3326.470947	92.390427
3	48.549999	97.75	4653.330078	36.060001	83.599998	4605.049805	92.605042	2030	20.059996	4264.508301	91.644226
4	48.459999	120.68	5660.879883	35.98	103.769997	5587.790039	91.618935	1957	24.979996	5119.473633	90.436005
5	48.369999	144.800003	6662.859863	35.959999	124.57	6564.359863	90.455025	1890	29.999994	5937.793457	89.11779
6	48.299999	170.300003	7662.240234	35.98	145.850006	7530.810059	89.167145	1831	35.019997	6715.008301	87.637665
7	48.23	196.919998	8645.570313	36	167.320007	8468.730469	87.567017	1773	39.939995	7415.814453	85.775887
8	48.16	226.059998	9684.820313	36.049999	190.399994	9456.889648	85.65139	1715	45.099995	8099.95752	83.635597
9	48.099998	255.380005	10730.74023	36.080002	213.759995	10445.12012	83.498512	1659	50.199993	8721.519531	81.276031
10	48.040001	282	11728.08008	36.09	236.429993	11383.75	81.017509	1603	54.939995	9222.831055	78.638885
11	47.959999	304.440002	12633.01953	36.049999	257.350006	12238.09961	78.440636	1550	59.139996	9599.643555	75.98851