Sea-Dog SD-87 200A 48V Resettable Circuit Breaker
Sea-Dog SD-87 200A 48V Resettable Circuit Breaker — Product description
The Sea-Dog SD-87 is a 200-amp manual-reset circuit breaker built to protect the big-draw DC circuits on your boat. Rated to 48 volts DC, IP66 sealed, and surface mount, it's made for thrusters, windlasses, inverters, and 48-volt trolling motor mains.
The Sea-Dog SD-87 is a 200-amp resettable circuit breaker built to protect the high-current DC circuits on your boat. Rated to 48 volts DC, it covers everything from a standard 12-volt house system up through 24, 36, and 48-volt setups. That makes it a natural fit for the big-draw stuff: bow thrusters, windlasses, inverters, and the battery-bank mains on 48-volt trolling motor rigs.
It's a manual reset breaker. When it trips on an overload, it stays open until you push the button back in yourself. No guessing whether the circuit reset on its own while you weren't looking. You clear the fault, you reset it, you're back in business. And on a thruster or windlass circuit, that's exactly what you want, because a surprise re-energize is the last thing you need with your hands near the gear.
The housing is surface mount, so it bolts down flat on a bulkhead, a panel, or an engine-bay wall. Terminals are 5/16 inch-18 studs, sized to take the heavy cable lugs those 200-amp runs call for. It carries an IP66 rating too, which means it's dust-tight and shrugs off strong water spray. You can mount it somewhere exposed without babying it, though it's not built to sit underwater.
On the standards side, the SD-87 meets SAE J553, ABYC E-11, UL 1077, and SAE J1171. So if you're wiring to ABYC and you want the job to pass a survey, this one checks the box. It ships as a single breaker in black plastic.
One thing to size right: pick the breaker to match your cable and load, not just the appliance. A 200-amp breaker is there to protect the wire, so make sure your cable gauge is rated to carry that current before you land the lugs. Not sure what you need? We're happy to talk it through before you order.
Key Features
- 200-amp rating protects high-draw DC circuits like bow thrusters, windlasses, inverters, and 48-volt trolling motor mains
- Rated to 48 volts DC, so it works across 12V, 24V, 36V, and 48V systems
- Manual reset button trips on overload and stays open until you reset it by hand, no surprise re-energize
- IP66 protection rating: dust-tight and sealed against strong water spray for exposed mounts
- 5/16 inch-18 stud terminals accept heavy-gauge cable lugs for 200-amp runs
- Surface-mount black plastic housing bolts flat to a bulkhead, panel, or engine-bay wall
- Meets SAE J553, ABYC E-11, UL 1077, and SAE J1171 standards for survey-ready wiring
Why Buy from NVN Marine
- Authorized Sea-Dog reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | SD-87 Resettable Circuit Breaker; 200 Amp; 48 Volt DC; Manual Reset; Black; Plastic; Surface Mount; 5/16 Inch-18 Stud Terminal; SAE J553/ ABYC-E11/ UL1077/ SAE J1171 Standard; IP66 Protection Rating; Single |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 830532 |
| UPC | 035514830768 |
| Series | SD-87 |
| Amperage | 200 Amp |
| Voltage | 48 Volt DC |
| Reset Type | Manual Reset |
| Mount Type | Surface Mount |
| Terminal | 5/16 Inch-18 Stud Terminal |
| Protection Rating | IP66 |
| Standards | SAE J553, ABYC-E11, UL1077, SAE J1171 |
| Color | Black |
| Material | Plastic |
| Quantity | Single |
Frequently asked questions
What is the Sea-Dog SD-87 rated for?
200 amps at up to 48 volts DC. That covers the high-current circuits on most boats, from house-bank mains to thrusters and 48-volt trolling systems.
Is it a manual or automatic reset breaker?
Manual reset. When it trips on an overload it stays open until you push the reset button back in yourself. You clear the fault first, then reset.
Will it work on a 12-volt or 24-volt system?
Yes. The 48-volt DC rating is the maximum, so it's fine on 12V, 24V, and 36V systems as well.
What size cable can I connect to it?
The terminals are 5/16 inch-18 studs, sized to take the heavy-gauge cable lugs a 200-amp run calls for. Match your cable gauge to the load before you land the lugs.
Is the SD-87 waterproof?
It carries an IP66 rating, so it's dust-tight and sealed against strong water spray. You can mount it somewhere exposed, but it isn't meant to be submerged.
Does it meet ABYC standards?
Yes. The SD-87 meets SAE J553, ABYC E-11, UL 1077, and SAE J1171, so it's suited to survey-ready marine wiring.
Where would I actually use a 200-amp breaker?
On the big-draw circuits: bow and stern thrusters, anchor windlasses, inverters, and the battery-bank main on a 48-volt trolling motor setup.
