Lewmar - 70A Slow-Blow Circuit Breaker - 68000240
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Lewmar 70A Slow-Blow Thermal Magnetic Circuit Breaker — Windlass Protection
The Lewmar 68000240 is a 70-amp slow-blow thermal magnetic circuit breaker designed for use with Lewmar electric anchor windlasses. It provides overcurrent protection for the windlass motor circuit, tripping on sustained overloads while tolerating the high inrush current that occurs during normal windlass startup and operation.
Key Features
- 70A rating — matched to the typical current draw of compatible Lewmar windlass systems
- Slow-blow thermal magnetic design — tolerates startup inrush current without nuisance tripping, while protecting against sustained overloads and short circuits
- Windlass-specific application — engineered for the high-current, intermittent-duty cycle of electric anchor windlass motor circuits
- Lewmar OEM part — direct replacement for compatible Lewmar windlass installations specifying a 70A breaker
Application
This breaker is used in the main power circuit between the battery bank and the windlass contactor/motor. It protects the wiring and motor from damage in the event of a short circuit, wiring fault, or sustained mechanical overload. The breaker is typically mounted in an accessible location near the battery or in the anchor locker.
Parts Desk Insights
- Match to your windlass model: Confirm the Lewmar wiring diagram for your specific windlass specifies a 70A breaker before ordering. Some Lewmar models require a different amperage — using an undersized breaker causes nuisance trips; an oversized breaker may not protect the wiring.
- Slow-blow is required: Standard fast-blow breakers will trip on windlass startup inrush current. This slow-blow thermal magnetic design is specifically rated for motor circuits with high startup loads — do not substitute a standard automotive or panel breaker.
- Wire sizing matters: The breaker protects the wire, not just the motor. Confirm your cable run length and gauge are correct for 70A continuous service before installation. Undersized wire with an oversized breaker is a fire risk.
- Mounting location: Install in a dry, accessible location. The breaker must be reachable for manual reset after a trip. Confirm the mounting orientation is compatible with the breaker’s reset mechanism.
- Not sure if this is the right breaker? Call the parts desk with your windlass model and we’ll confirm the correct amperage and part number.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.