Sea-Dog SD-17 120A Circuit Breaker | 48V DC 830198
Sea-Dog SD-17 120A Circuit Breaker | 48V DC 830198 — Product description
Sea-Dog's SD-17 is a 120-amp resettable thermal circuit breaker built for 48-volt DC marine systems. It protects heavy loads like trolling motors and windlasses, and the switchable reset lets it double as a manual on/off. IP67-sealed and panel-mount, so it holds up where the spray gets in.
Sea-Dog's SD-17 is a 120-amp resettable thermal circuit breaker built for 48-volt DC systems, and it's the kind of protection you want sitting between your battery bank and a heavy load. Think trolling motors, windlasses, bow thrusters, inverters, anything pulling serious current on a 48V setup. When the circuit sees more amps than it should, the breaker trips and cuts the flow before the wiring or the gear cooks.
What makes this one handy is the switchable reset. It doesn't just pop and wait for you to push a button. You can flip it by hand, so it works as a manual on/off disconnect for the circuit as well as an overload trip. That's one less switch to wire in when you're laying out a panel.
Install is straightforward. The breaker panel-mounts through a single hole, and power lands on 1/4 inch-28 stud terminals, so you're torquing ring lugs down clean instead of fighting spade connectors on a high-current line. The housing is black plastic and sealed to IP67, which means dust-tight and good for temporary submersion. Bolt it in an open console, a locker near the bilge, or a bulkhead by the batteries and it'll shrug off spray.
It's built to the standards that matter on a boat: ABYC E-11 for AC and DC systems, UL 1077, and SAE J1625 and J1171. If you're wiring to survey or just doing it right, those are the boxes you want checked. One thing to size correctly: this is a 120-amp breaker rated to 48 volts DC. Match the amp rating to your wire gauge and the load, not the other way around. If you're not sure what your trolling motor or thruster actually draws, give us a call and we'll help you spec it. Better to get the number right than to nuisance-trip on the water or, worse, run a breaker that's too big to protect the wire.
Key Features
- 120-amp trip rating protects heavy 48V DC loads like trolling motors, windlasses, and thrusters
- 48-volt DC rating suits larger house and propulsion battery banks
- Switchable manual reset doubles as an on/off disconnect for the circuit
- 1/4 inch-28 stud terminals take ring lugs for clean, high-current connections
- IP67-sealed housing is dust-tight and handles temporary submersion
- Panel-mount design drops into a single hole on a console or bulkhead
- Meets ABYC E-11, UL 1077, and SAE J1625 and J1171 standards
- Black plastic housing resists corrosion and stands up to spray
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-17 Resettable Thermal Circuit Breaker |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 830198 |
| UPC | 035514830270 |
| Model | SD-17 |
| Type | Resettable Thermal Circuit Breaker |
| Amperage | 120 Amp |
| Voltage | 48 Volt DC |
| Reset Type | Manual / Switchable |
| Mounting | Panel Mount |
| Terminal | 1/4 Inch-28 Stud |
| Color | Black |
| Material | Plastic |
| Protection Rating | IP67 |
| Standards | SAE J1625, ABYC E-11, UL 1077, SAE J1171 |
| Quantity | Single |
Frequently asked questions
What does the SD-17 protect?
It sits between your battery bank and a heavy DC load and trips when the current runs past its 120-amp rating. That's the protection you want on 48V circuits feeding trolling motors, windlasses, bow thrusters, or inverters, so an overload cuts out before it cooks your wiring.
What does switchable reset mean?
Two things. If the breaker trips on an overload, you reset it by hand instead of replacing a fuse. And you can flip it manually any time to open or close the circuit, so it works as an on/off disconnect too.
Can I use it as an on/off switch for the circuit?
Yes. The switchable reset lets you kill the circuit by hand, which is handy for isolating a trolling motor or thruster when you're not using it. That's one less separate switch to wire into the panel.
Is it waterproof?
It's sealed to IP67, so it's dust-tight and rated for temporary submersion. Mount it in a console, a locker, or on a bulkhead near the batteries and it'll handle spray and washdown without trouble.
What terminals does it use?
1/4 inch-28 threaded studs. You land ring lugs on them and torque them down, which is the right way to make a high-current connection instead of relying on push-on spade terminals.
Does it meet ABYC standards?
It's built to ABYC E-11 for AC and DC electrical systems on boats, plus UL 1077 and SAE J1625 and J1171. If you're wiring to survey, those are the standards you want stamped on the part.
Can I use this on a 12- or 24-volt system?
You can. The 48-volt rating is a maximum, so it works fine on 12- or 24-volt DC circuits as long as the load stays within the 120-amp rating. Size the amp rating to your wire and load, not to the voltage.
