Sea-Dog SD-87 150A 48V DC Resettable Circuit Breaker
Sea-Dog SD-87 150A 48V DC Resettable Circuit Breaker — Product description
The Sea-Dog SD-87 is a 150-amp resettable circuit breaker built to protect the high-draw DC circuits on your boat. Rated to 48 volts DC with an IP66 weatherproof housing and a manual reset button, it's the breaker you wire in once and stop thinking about. Surface mounts anywhere you've got room.
When you're running a big load off your house bank, whether that's a windlass, a bow thruster, an inverter, or a heavy trolling motor setup, you need a breaker that can carry the current and shrug off spray. The Sea-Dog SD-87 does exactly that. It's rated for 150 amps and handles DC systems up to 48 volts, so it covers 12V, 24V, 36V, and 48V rigs without a second thought.
The reset is manual, and that's on purpose. When something trips this breaker, you want to know about it and go find out why before you close the circuit again. There's a button right on the face. Push it and you're back in business. No fuses to keep in the spares kit, no crimping a new link at the dock in the dark.
Connections are 5/16 inch-18 stud terminals, so you're landing proper ring terminals on heavy-gauge cable instead of fighting a screw clamp. That matters at 150 amps, where a loose connection turns into heat fast. The housing is black plastic rated IP66, which means it'll take a washdown and a hard rain without letting water into the mechanism. You can surface mount it on a bulkhead, inside a console, or in an engine space, as long as you can still reach the reset.
Sea-Dog built the SD-87 to the standards that matter out on the water. It meets SAE J553, ABYC E-11, UL1077, and SAE J1171, so it's right at home on a boat and it'll keep a surveyor happy. If you're wiring a new bow thruster or upgrading the feed to an inverter, this is the breaker to reach for.
One thing to keep in mind. This is a single breaker sized for one heavy circuit, not a distribution panel. Match the amp rating to your cable and your load, mount it where you can get at the reset, and you'll forget it's even there until the day it saves your wiring.
Key Features
- 150 amp rating protects windlasses, bow thrusters, inverters, and other high-draw DC circuits
- Rated for DC systems up to 48 volts, covers 12V, 24V, 36V, and 48V setups
- Manual reset button on the face means no fuses to replace after a trip
- 5/16 inch-18 stud terminals land heavy-gauge ring terminals securely at high amperage
- IP66-rated black plastic housing shrugs off spray, washdown, and hard rain
- Surface-mount design fits bulkheads, consoles, and engine spaces
- Meets SAE J553, ABYC E-11, UL1077, and SAE J1171 marine 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 | SD-87 Resettable Circuit Breaker; 150 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 | 830531 |
| UPC | 035514830751 |
| Model | SD-87 |
| Amperage Rating | 150 Amp |
| Voltage | 48 Volt DC |
| Reset Type | Manual Reset |
| Color | Black |
| Material | Plastic |
| Mounting | Surface Mount |
| Terminal | 5/16 Inch-18 Stud Terminal |
| Standards | SAE J553, ABYC-E11, UL1077, SAE J1171 |
| Protection Rating | IP66 |
| Quantity | Single |
Frequently asked questions
What can the SD-87 protect?
It's a 150-amp breaker, so it's sized for one heavy DC circuit like a windlass, bow thruster, inverter feed, or a large trolling motor run. Match the amp rating to your cable and load.
Will it work on my 12-volt system?
Yes. It's rated for DC systems up to 48 volts, so it works on 12V, 24V, 36V, and 48V setups.
How do I reset it after it trips?
There's a manual reset button on the face of the breaker. Once you've found and fixed what caused the trip, push the button to close the circuit again.
Is it waterproof?
The housing carries an IP66 protection rating, so it stands up to washdown and heavy rain without water reaching the mechanism.
What size terminals does it use?
It uses 5/16 inch-18 stud terminals. Land properly crimped ring terminals on heavy-gauge cable for a secure, low-resistance connection at 150 amps.
Is it ABYC compliant?
Yes. The SD-87 meets SAE J553, ABYC E-11, UL1077, and SAE J1171, so it satisfies the standards that matter for marine DC wiring.
Can I use it as a main distribution panel breaker?
No. This is a single breaker sized for one heavy circuit, not a distribution panel. Mount it where you can reach the reset and pair it with the right cable gauge for the load.
