SEP50 Tunnel thruster, 24v

SEP50 Tunnel thruster, 24v
50kg thrust proportional


Side-Power Intelligent Power Control

Intelligent Power Control

The Side-Power unique thruster controller that intelligently protects the thruster from potential inherent problems in all high current applications as well as user faults. It includes several important safety features imperative in a product with such high power, run by DC electrics, as a thruster.

  • Provides delay between drive directions
  • Monitors solenoid functions to reduce the chance of solenoid lock-in
  • Will stop the thruster in case of a lockedin solenoid, without extra user action and even without controlling a main switch.

Side-Power Single Propeller

Single Propeller

A properly engineered single propeller system will be the most energy efficient thruster. Its compact design fits easily into narrow bows making it the perfect match for our smaller models. With more than 60.000 single propeller thrusters in use, the Side-Power single series system has proven its reliability.

Side-Power Sealed Drive Lifetime Lubricated

Sealed and lifetime lubricated gearleg

Sealed gearleg with long-life "mechanical" seal where highly polished ceramic and carbon surfaces form the only moving sealing surfaces, ensuring protection against damaging water intrusion into the gear leg. Pre-filled with special gear oil for lifetime lubrication.

  • "Mechanical" seals with surfaces of ceramic and carbon for ultimate security against water intrusion

Side-Power Galvanic Separation

Galvanic Separation

The gearhouse / drive legs of most Side-Power DC Electric thrusters are now fully galvanically isolated / separated from the electric motor and motor bracket. This ensures that even if there is an accidental short circuit or a current leak for other reasons, the immersed parts are not effected as they could be with direct electric contact.

  • Achieved by composite bushings around the bolts and beneath the washers and a bushing in the motor bracket electrically isolating the drive housing from the motor bracket.
  • Available on DC electric models with flexible couplers only, where the flexible coupler provides galvanic separation of the motor and gearleg shaft.

Side-Power Q-prop™


The new 5 blade special skew propellers are the result of over 2 years of development work and thousands of tests. They have been designed to reduce the noise level, while maintaining the exceptional efficiency of the old 4 blade Side-Power propellers. This goal was achieved, and we even chose to make them a little bit more aggressive on some models, increasing the thrust on some thrusters about 5%. Please see individual information on each new thruster for more details.

  • Noise reductions of up to 75% measured in controlled environments
  • The expected and tested normal noise reduction in average installations: 20-40%
  • Will be delivered on all Side-Power models except models with 300mm and 385mm tunnel diameter
  • Upgrade kits are available for most SP series thrusters with special adaptors

Side-Power S-link™


S-link™ is a CAN-based control system with full intelligent communication between all units in the system, much like a computer network.

  • Round, compact and waterproof connectors with unique keying and color coding to avoid faulty hookup
  • Unlimited number of commands or information transferred on a single cable
  • User feedback at panel
  • Intelligent troubleshooting

Side-Power PROportional


A PROportional speed controlled thruster system allows for more precise handling of the boat in all conditions, applying only the necessary power needed to complete your maneuver confidently.

By limiting the power under normal weather conditions, noise levels are significantly reduced. The system also includes a practical HOLD-function in a twin thruster system. With a single press of a button, the bow and stern thruster will keep you alongside the docks - making single handed docking very easy indeed! Proportional thrusters are also the best choice for joystick interaction.

A DC Speed Control system contains three main elements - proportional control panels, a power control unit and a DC electric thruster - all tied together with the new S-link™ control system. The thrusters used in a speed control system are almost identical to the familiar SE range of DC thrusters, the only difference being the addition of a temperature sensor and a new electronic control box. All mechanical and main electric parts are from the well proven thruster range produced by Side-Power for many years.

All 12 & 24 volt DC electric thrusters produced by Side-Power can be enabled for DC Speed Control by authorized Side-Power service personnel, even the oldest models.

Thrust at 12V/24V* (kg • lbs) 62 • 136
Thrust at 10.5V/21V* (kg • lbs) 50 • 110
Typical boat size (ft • m) 27' - 37' • 8 - 11
Tunnel inner diameter (mm • in) 140 • 5.5"
Propulsion Single
Power at 10.5V/21V* (kW * hp) 2.4 • 3.2
For DC system (V) 12/24
Weight (kg • lbs) 15 • 33
Min. battery capacity (CCA** 12/24V) 350/175

* All Side-Power thrusters gets their thrust rating from the actual performance you can expect in a boat - at the voltage a normal installation will provide at the thruster. We have choosen to use the net performance at 10.5V/21V, but we also list the effect at 12/24V for comparison.

** All battery CCA ratings are stated with the DIN rating, multiply by 1.9 to to get the SAE equivalent (at 0°F, ABYC standard).

# Description Product
1 Propeller 5 1260
2 Propeller drivepin 141258
3 Propeller washer 208125
4 Locknut 3 1250
5 Anode 3 1180 A
6 Gasket 141261
7 Gearleg bolt 141259
8 Complete gearleg 5 0600
9 Complete motor bracket 3 0502
10 Complete flexible coupling SM-137073
11 Brushes for motor (kit)** **
12 Brush springs for motor (kit)** **
13 Electric motor N/A
14 Gasket 6 1061
15 Key for electric motor shaft 141285
16 Solenoid bracket kit 4 0135
17 Internal wiring loom 6 1222
18 Internal wiring loom 6 1223
19 Solenoid 41471243
20 Complete solenoid kit 4 0131 24
21 Solenoid Cover 4 2026 A
22 Nut for solenoid cover 6 8807
23 Complete electric motor assembly 5 0102 24
24 Temp sensor 31019
25 PPC PPC520
26 PPC control cable 6 1280-05M

The installer alone has responsibility for the installation of the spare parts. Side-Power only warranty the spare parts supplied only.

The information given in the document was correct at the time it was published. However, Sleipner Motor AS can not accept liability for any inaccuracies or omissions it may contain. Continuous product improvement may change the product specifications without notice. Therefore, Sleipner Motor AS can not accept liability for any possible differences between product and document.

File Type Language Download
Product specification sheet SE50 EN.pdf Product sheet English  Download
Drilling template SE50 140mm.pdf Product sheet English  Download
(INSTALLATION MANUAL) (SEP) (50).pdf Manual English, Norwegian  Download
(USER MANUAL) (SE PRO).pdf Manual English  Download
CAD-files & technical drawings

3D models & technical drawings
for industry professionals

At Sleipner, we have shared our knowledge and technology with naval architects and boat builders for over a century. Now, we have also decided to open up our complete library of .cad, .igs, .dwg, .dxf, .stp, .xt, .pdf files and more.

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Code Description Value (mm) Value (inch)
ID Internal tunnel diameter 140 5.51
H Motor Height 264 10.39
W Width 200 7.87
L Length 208 8.19
WD Water Depth 140 5.51
TL Minimum tunnel length 124 4.88
TL (recommended) Recommended tunnel length 152 5.98
T (min) Minimum tunnel wall thickness 5 0.2
T (max) Maximum tunnel wall thickness 7 0.28