Sea-Dog SD-87 100A 48V Circuit Breaker | 830528
Sea-Dog SD-87 100A 48V Circuit Breaker | 830528 — Product description
The Sea-Dog SD-87 is a 100-amp resettable circuit breaker built for 48-volt DC systems on boats. It protects your wiring from overload and shorts, resets with a push of the button, and stays sealed to IP66 against spray and washdown. Ignition-protected too, so it's safe to mount near a gas engine.
When you're feeding a 48-volt trolling motor bank or a high-draw DC circuit, you want a breaker that trips clean and resets by hand. That's the Sea-Dog SD-87. It's a 100-amp resettable circuit breaker rated for 48 volts DC, built to sit on a surface mount and take the weather.
The SD-87 does one job and does it well. It protects the wire between your battery bank and whatever's pulling the current. If the load spikes or a short develops, the breaker opens before the wiring cooks. Once you've sorted the problem, you push the reset button and you're back in business. No fuses to carry, no spares to lose in the bilge. That's the difference between a five-minute fix on the water and a slow ride back to the ramp under a tow.
Terminals are 5/16 inch-18 studs, so you're landing ring lugs and torquing them down. That's the connection you want on a 100-amp feed. Loose spade connectors don't belong anywhere near this kind of current. The housing is black plastic, sealed to IP66, which means it shrugs off dust and heavy washdown. Mount it in a console, a battery compartment, or an exposed run where spray is a fact of life.
It carries the certifications that matter on a boat. SAE J553 for the breaker itself, ABYC E-11 for marine DC systems, UL1077 as a supplementary protector, and SAE J1171 for ignition protection. That last one counts if the breaker lives anywhere near a gas engine or fuel system. Ignition-protected means it won't set off fumes.
This is the single-breaker version. If you're running a 48-volt system with a big trolling motor, a stack of electronics, or an inverter feed, size the breaker to your wire and continuous load, not just the peak. Not sure what you need? Give us a shout and we'll help you spec it.
Key Features
- 100-amp rating protects high-draw 48-volt DC circuits from overload and short-circuit damage
- Manual push-button reset, no fuses to replace or carry as spares
- 5/16 inch-18 stud terminals accept ring lugs for a secure high-current connection
- IP66-sealed black plastic housing stands up to dust and heavy washdown
- Surface-mount design installs in a console, battery compartment, or exposed run
- SAE J1171 ignition protection, safe to mount near gas engines and fuel systems
- Meets SAE J553, ABYC E-11, and UL1077 standards for marine DC electrical systems
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-87 100A 48V DC Resettable Circuit Breaker |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 830528 |
| UPC | 035514830720 |
| Series | SD-87 |
| Amperage | 100 Amp |
| Voltage | 48 Volt DC |
| Reset Type | Manual Reset |
| Mounting | Surface Mount |
| Terminal | 5/16 Inch-18 Stud |
| Housing Material | Plastic |
| Color | Black |
| Protection Rating | IP66 |
| Standards | SAE J553 / ABYC-E11 / UL1077 / SAE J1171 |
| Quantity | Single |
Frequently asked questions
What voltage and amperage is the SD-87 rated for?
It's rated for 100 amps at 48 volts DC. That makes it a fit for higher-voltage DC systems like 48-volt trolling motor banks and inverter feeds.
How do I reset it after it trips?
Push the manual reset button on the face. Once you've cleared whatever caused the overload, it snaps back and the circuit's live again. No tools, no replacement parts.
What kind of terminals does it use?
It uses 5/16 inch-18 studs. You land ring lugs on them and torque them down, which is the right connection for a 100-amp feed.
Can I mount it in a wet location?
Yes. It's sealed to IP66, so it handles dust and heavy washdown. Surface mount it in a console, a battery box, or an exposed run.
Is it safe to install near a gas engine?
It is. The SD-87 carries SAE J1171 ignition protection, so it won't ignite fuel vapors. That's what makes it safe around gasoline systems.
How do I size the breaker for my system?
Match the breaker to your wire gauge and continuous load, not just the peak draw. If you're not sure, send us your setup and we'll help you get it right.
