Sea-Dog SD-17 100A 48V Thermal Circuit Breaker
Sea-Dog SD-17 100A 48V Thermal Circuit Breaker — Product description
The Sea-Dog SD-17 is a 100-amp resettable thermal circuit breaker built for 48-volt DC systems. It's a switchable, manual-reset breaker that doubles as an on/off switch, so you can kill a circuit by hand or let it trip on an overload. Sealed to IP67 and rated to ABYC-E11 and UL1077, it holds up to spray, weather, and the pounding a boat takes.
The Sea-Dog SD-17 is a 100-amp resettable thermal circuit breaker made for the higher-current DC circuits on a boat. Rated up to 48 volts DC, it covers 12V, 24V, and 36V systems too, which makes it a solid fit for trolling motors, windlasses, bow thrusters, inverters, and big audio amps. Anywhere you're pushing real current and want protection you can reset on the spot.
What sets this one apart is the switchable, manual-reset design. It's a breaker and a switch in one. Flip it to cut power to a circuit by hand, and if that circuit ever pulls more than it should, the thermal element trips and opens before your wiring gets a chance to overheat. When it trips, you just reset it. No fuses to hunt for, no spares to keep in the glovebox.
It's sealed to an IP67 rating, so it shrugs off spray, rain, and the odd wave over the bow. Sea-Dog also builds it to SAE J1171, the external ignition-protection standard, which means it's safe to mount in a bilge or engine space where gasoline fumes can collect. Add in ABYC-E11 and UL1077 compliance and you've got a breaker that meets the marine electrical standards a surveyor or insurer looks for.
The body is molded black plastic with a surface-mount footprint, so it bolts to a bulkhead, a panel, or a bracket without much fuss. Power connects through 1/4 inch-28 stud terminals, the kind of heavy stud that takes a proper ring lug and torques down tight for a low-resistance connection under load. That matters at 100 amps, where a loose terminal turns into heat fast.
If you're wiring up a new house circuit or replacing a breaker that's seen too many seasons, the SD-17 is a straightforward, standards-rated choice. Mount it, land your lugs, and you're done. Ships as a single breaker.
Key Features
- 100-amp rating handles high-draw DC circuits like trolling motors, windlasses, and inverters
- 48-volt DC maximum rating covers 12V, 24V, and 36V systems too
- Switchable, manual-reset design works as both a breaker and an on/off switch
- IP67 sealed against dust, spray, and temporary submersion
- Built to SAE J1171 for ignition protection, safe to mount in gas engine and bilge spaces
- 1/4 inch-28 stud terminals take heavy ring lugs for a low-resistance, high-current connection
- Surface-mount black plastic housing bolts to a bulkhead, panel, or bracket
- Meets SAE J1625, ABYC-E11, and UL1077 marine electrical standards
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 | Sea-Dog SD-17 100 Amp 48V DC Resettable Thermal Circuit Breaker |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 830227 |
| UPC | 035514830362 |
| Series | SD-17 |
| Amperage | 100 Amp |
| Voltage | 48 Volt DC |
| Reset Type | Switchable / Manual Reset |
| Terminal | 1/4 Inch-28 Stud Terminal |
| Mounting | Surface Mount |
| Housing Material | Plastic |
| Color | Black |
| Protection Rating | IP67 |
| Standards | SAE J1625 / ABYC-E11 / UL1077 / SAE J1171 |
| Quantity | Single |
Frequently asked questions
What load is the SD-17 rated for?
It's a 100-amp thermal circuit breaker rated up to 48 volts DC. Size your wire gauge to the 100-amp rating and the length of your run.
Can I use it on a 12-volt or 24-volt system?
Yes. The 48-volt DC rating is the maximum, so it works fine on 12V, 24V, and 36V DC circuits.
Does it work as a switch too?
Yes. It's a switchable, manual-reset breaker, so you can flip it by hand to cut power to a circuit, and it also trips automatically on an overload.
How do I reset it after it trips?
It's a manual-reset breaker. Once the fault is cleared and the breaker has cooled, flip it back to restore power.
Is it safe to mount near a gas engine?
Yes. It's built to SAE J1171 for external ignition protection, so it can go in engine and bilge spaces where fuel vapors may be present.
How does it mount and connect?
It's a surface-mount breaker that bolts to a flat surface. Power connects through 1/4 inch-28 stud terminals sized for ring lugs.
Is it waterproof?
It carries an IP67 rating, meaning it's dust-tight and protected against temporary immersion, so it holds up to spray and rain on deck.
