CrimpSide-Power SP75 Bow Thruster
Tunnel bow thruster for boats around 35–48 ft, 75 kgf thrust. Intermittent duty — rated for a few minutes of continuous run per use — drawing hundreds of amps while thrusting; Side-Power specifies a 500 A ANL main fuse for the 12 V SP75.
Open in Crimp →A sizing result with its assumptions attached.
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The design current is the part's continuous draw. The Crimp engine applies its ordinary continuous-load headroom, voltage-drop budget, terminal clamp, and standard fuse ladder. The 3 m one-way run is a stated reference, not a universal installation prescription.
The part the engine actually sees.
- Compatible systems
- 12 V
- Continuous draw
- 260 A
- Surge current
- 380 A
Terminal map
| Terminal | Polarity | Direction | Rating |
|---|---|---|---|
| + | positive | input | 400 A |
| − | negative | input | 400 A |
What belongs around it.
- 6 m total of 120 mm² (4/0 AWG) marine cable
- Four 120 mm² cable lugs matched to the equipment studs
- 350 A fuse and holder on the positive run
- Heat-shrink, strain relief, and terminal boots sized to the cable
See what it changes in your system
With JavaScript enabled, describe your existing boat, van, or off-grid system here. The model supplies topology; Crimp's engine computes the attachment, resized runs, checks, and supporting basket.
What is known, assumed, and computed.
Catalog profile
The manufacturer, model, ratings and terminal map are maintained as planning data in Crimp's component catalog. Confirm the current manufacturer manual, exact revision and installed nameplate before ordering or wiring.
Engine reference
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The published conductor, fuse and voltage-drop result uses the visible reference length and current basis; it is not a universal installation prescription.
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