Sea-Dog SD-17 25A Circuit Breaker 48V DC | 830220
Sea-Dog SD-17 25A Circuit Breaker 48V DC | 830220 — Product description
Sea-Dog's SD-17 is a 25-amp resettable thermal breaker that does double duty as a circuit protector and a manual on/off switch. Rated to 48 volts DC and sealed to IP67, it's built for the wet, high-vibration spots on a boat where a fuse just isn't practical.
The Sea-Dog SD-17 is a resettable thermal circuit breaker built for 25-amp DC circuits, and it's one of those parts you install once and forget about until it does its job. When a circuit pulls more current than it should, the breaker trips and cuts power before the wiring overheats. No blown fuse to dig out of a holder, no spare to hunt for in a rolling sea. You just reset it and figure out what tripped it.
It's rated up to 48 volts DC, so it covers everything from a standard 12-volt house circuit to a 48-volt trolling motor or lithium bank. The 25-amp rating suits bilge pumps, lighting circuits, electronics feeds, and accessory panels. If you're wiring a windlass or a bigger load, size up to the right breaker instead.
The reset is manual and switchable, which is the part boaters like. Beyond the automatic trip, you can flip it by hand to kill the circuit for service or winter storage. That means the SD-17 doubles as an on/off switch, so you're not adding a separate disconnect just to isolate a pump or a light. Reset it after a trip and you're back in business.
Connections are 1/4 inch-28 stud terminals, so you're ringing your wires with proper lugs and torquing them down, not fighting a friction-fit spade in a damp locker. It surface-mounts to a bulkhead or panel, and the black plastic housing is sealed to IP67, meaning it shrugs off spray, rain, and the occasional dunk. Mount it where you can reach the reset without pulling a panel apart.
Sea-Dog builds the SD-17 to SAE J1625, ABYC-E11, UL1077, and SAE J1171 standards, so it meets the marine wiring codes surveyors and insurers actually care about. If you're doing a rewire and want protection that's rated for a boat instead of borrowed from the auto parts aisle, this is the right kind of part. It's sold as a single breaker.
Key Features
- 25-amp rating protects DC accessory, lighting, and pump circuits from overcurrent
- Rated to 48 volts DC, covers 12V, 24V, 32V, and 48V systems
- Manual switchable reset doubles as an on/off disconnect for service or storage
- 1/4 inch-28 stud terminals for a secure, lugged wire connection
- IP67-sealed black plastic housing stands up to spray and washdown
- Surface-mounts to a bulkhead or panel
- Meets SAE J1625, ABYC-E11, UL1077, and SAE J1171 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 Resettable Thermal Circuit Breaker |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 830220 |
| UPC | 035514830294 |
| Series | SD-17 |
| Amperage | 25 Amp |
| Voltage | 48 Volt DC |
| Reset Type | Manual / Switchable Reset |
| Mounting | Surface Mount |
| Terminal | 1/4 Inch-28 Stud Terminal |
| Housing Material | Plastic |
| Color | Black |
| Protection Rating | IP67 |
| Standards | SAE J1625 / ABYC-E11 / UL1077 / SAE J1171 |
| Quantity | Single |
Frequently asked questions
What kind of circuits does the 25-amp rating cover?
It's sized for typical DC loads like bilge pumps, lighting circuits, electronics feeds, and accessory panels. For a heavier draw like a windlass, step up to a breaker rated for that load instead.
Can I use this on a 24-volt or 48-volt system?
Yes. It's rated up to 48 volts DC, so it works on 12V, 24V, 32V, and 48V systems, including a 48-volt trolling motor or lithium bank.
Does it work as an on/off switch?
It does. The reset is manual and switchable, so beyond the automatic overcurrent trip you can flip it by hand to isolate the circuit for service or storage. That saves you from wiring a separate disconnect.
Is it waterproof?
The black plastic housing carries an IP67 protection rating, so it handles spray, rain, and brief submersion. It's built for the damp, exposed spots where you'd normally worry about a breaker.
What kind of wire connections does it use?
It uses 1/4 inch-28 stud terminals. You crimp ring lugs onto your wire and torque them to the studs for a solid, vibration-proof connection.
Is it marine-code compliant?
Yes. Sea-Dog builds it to SAE J1625, ABYC-E11, UL1077, and SAE J1171 standards, which are the marine wiring codes surveyors and insurers look for.
