Sea-Dog SD-17 150A 48V DC Circuit Breaker
Sea-Dog SD-17 150A 48V DC Circuit Breaker — Product description
The Sea-Dog SD-17 is a 150-amp resettable thermal circuit breaker built for 48-volt DC systems on the water. It doubles as a manual on-off switch, carries an IP67 waterproof rating, and meets the marine standards that matter. A clean way to protect a high-current run and kill power at the same point.
If you're running a 48-volt system on your boat, you need protection sized for it, and the SD-17 handles that job at 150 amps. This is a thermal circuit breaker, so when it sees a sustained overload it trips on heat, then resets once things cool down and you flip it back on. No fuses to carry. No scrambling for a spare at the ramp. It's the kind of part you wire in once and mostly forget about, which is exactly what you want out of a breaker.
Here's the part a lot of folks like. The SD-17 is switchable, so it works as a manual on-off switch as well as a breaker. You can cut power to a circuit right at the breaker instead of adding a separate switch for the job. That's handy on 48-volt trolling motor rigs, inverters, or any high-draw run where you want a single point to both protect and disconnect.
Build quality is what you'd expect from Sea-Dog. The housing is black plastic, it surface-mounts flat against a bulkhead or panel, and the connections are 1/4 inch-28 stud terminals that take a ring lug and a nut. The IP67 rating means it keeps out dust and survives a temporary dunk, so it's fine in a bilge-adjacent spot or an exposed console area. It's built to SAE J1625, ABYC-E11, UL1077, and SAE J1171, which covers the marine wiring standards most surveyors and insurers care about.
One thing to get right before you buy. Size the breaker to your wiring and load, not just the biggest number on the shelf. A 150-amp breaker belongs on a run that's genuinely rated for that current, so match it to your cable gauge and the device it feeds. Get that right and the SD-17 is a straightforward, code-friendly way to protect and switch a heavy 48-volt circuit. It's sold as a single breaker.
Key Features
- 150-amp rating at 48 volts DC, sized for high-current circuits like 48V trolling motor and inverter runs
- Thermal design trips on a sustained overload and resets manually once cooled, so there's no fuse to replace
- Switchable operation doubles as a manual on-off switch, giving you one point to both protect and disconnect a circuit
- IP67 protection rating keeps out dust and survives temporary submersion, fine for exposed or bilge-adjacent mounting
- 1/4 inch-28 stud terminals accept standard ring lugs for a solid high-current connection
- Surface-mount black plastic housing installs flat against a bulkhead or panel
- Built to SAE J1625, ABYC-E11, 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-17 Resettable Thermal Circuit Breaker; 150 Amp; 48 Volt DC; Switchable/ Manual Reset; Black; Plastic; Surface Mount; 1/4 Inch-28 Stud Terminal; SAE J1625/ ABYC-E11/ UL1077/ SAE J1171 Standard; IP67 Protection Rating; Single |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 830229 |
| UPC | 035514830386 |
| Model | SD-17 |
| Breaker Type | Resettable Thermal Circuit Breaker |
| Amperage Rating | 150 Amp |
| Voltage | 48 Volt DC |
| Reset Type | Switchable / Manual Reset |
| Color | Black |
| Material | Plastic |
| Mounting | Surface Mount |
| Terminal | 1/4 Inch-28 Stud Terminal |
| Standards | SAE J1625, ABYC-E11, UL1077, SAE J1171 |
| Protection Rating | IP67 |
| Quantity | Single |
Frequently asked questions
What is the Sea-Dog SD-17 rated for?
It's rated at 150 amps on a 48-volt DC system. That makes it a fit for high-current circuits, not small accessory runs.
Is the SD-17 resettable?
Yes. It's a thermal breaker, so it trips on a sustained overload and you reset it manually once it cools. There's no fuse to replace.
Can it work as a switch too?
It can. The SD-17 is switchable, so it doubles as a manual on-off switch and lets you disconnect the circuit right at the breaker.
Is it waterproof?
It carries an IP67 rating, which means it's dust-tight and can handle temporary submersion. It holds up in exposed or bilge-adjacent spots.
What marine standards does it meet?
It's built to SAE J1625, ABYC-E11, UL1077, and SAE J1171, covering the wiring standards surveyors and insurers typically look for.
How does it mount and connect?
It surface-mounts flat to a bulkhead or panel and uses 1/4 inch-28 stud terminals that accept ring lugs for a solid high-current connection.
