Sea-Dog SD-17 30A Thermal Circuit Breaker, 48V DC
Sea-Dog SD-17 30A Thermal Circuit Breaker, 48V DC — Product description
The Sea-Dog SD-17 is a 30-amp resettable thermal circuit breaker rated for DC systems up to 48 volts. It's a panel-mount, IP67-rated breaker with a manual switchable reset, so it protects your circuit and doubles as an on/off switch for the load.
The Sea-Dog SD-17 is a resettable thermal circuit breaker built to protect a 30-amp DC circuit on your boat. It's rated for systems up to 48 volts DC, so it drops right into a 12-, 24-, or 48-volt setup without a second thought. Thermal breakers like this one react to the heat that too much current makes, trip to cut the circuit, then reset once things cool down and you flip it back on. If you've ever chased a mystery electrical gremlin at the dock, you already know why a proper breaker beats carrying a pocket full of spare fuses.
This one uses a manual, switchable reset, so it does double duty. It trips on an overload to protect your wiring, and the lever lets you switch the circuit off and back on by hand when you want to isolate a load for service. Wire it into a bilge pump, a livewell, a windlass feed, nav lights, or a bank of helm accessories, and you get overload protection plus a handy on/off in one panel-mounted part.
The housing is black plastic in a panel-mount design, so it sits clean on a helm panel or an electrical distribution board. Connections are 1/4 inch-28 stud terminals, which take ring terminals and torque down tight for a low-resistance joint that won't shake loose with engine vibration. And because it carries an IP67 protection rating, it shrugs off spray, washdown, and the occasional dunking that's just part of life on the water.
Standards matter when you're wiring a boat, and this breaker covers them: SAE J1625, ABYC E-11, UL1077, and SAE J1171. That last one is the ignition-protection spec, which is exactly what you want anywhere gasoline fumes could collect, like an engine bay or a bilge. Whether you're building a fresh panel or swapping out a tired old breaker, the SD-17 gives you clean, code-friendly circuit protection you can set and forget. It ships as a single breaker, no spare-fuse hunting and no guesswork.
Key Features
- 30 amp rating protects a single DC circuit from overload and short-circuit damage
- Rated to 48 volts DC, so it works in 12V, 24V, and 48V systems
- Manual switchable reset doubles as an on/off switch for isolating the load
- Thermal trip mechanism reacts to heat from excess current, then resets after it cools
- 1/4 inch-28 stud terminals take ring terminals for a tight, low-resistance connection
- Panel-mount design fits a helm panel or electrical distribution board
- IP67 protection rating stands up to spray, washdown, and brief immersion
- Meets SAE J1625, ABYC E-11, UL1077, and SAE J1171 ignition-protection 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, 30 Amp, 48 Volt DC, Manual/Switchable Reset |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 830191 |
| UPC | 035514830201 |
| Amperage | 30 Amp |
| Voltage | 48 Volt DC |
| Breaker Type | Resettable Thermal Circuit Breaker |
| Reset Type | Manual / Switchable Reset |
| Color | Black |
| Material | Plastic |
| Mounting | Panel Mount |
| Terminal | 1/4 Inch-28 Stud Terminal |
| Standards | SAE J1625, ABYC-E11, UL1077, SAE J1171 |
| Protection Rating | IP67 |
| Sold As | Single |
Frequently asked questions
What amperage and voltage is the SD-17 rated for?
It's a 30-amp breaker rated for DC systems up to 48 volts, which covers 12-, 24-, and 48-volt setups.
Can I use it as an on/off switch?
Yes. It has a manual, switchable reset, so the lever lets you switch the circuit off and back on by hand to isolate a load for service, on top of tripping automatically on an overload.
How does it mount and connect?
It's a panel-mount breaker that installs in a helm panel or electrical distribution board. Connections are 1/4 inch-28 stud terminals that take ring terminals.
Is it waterproof?
It carries an IP67 protection rating, so it handles spray, washdown, and brief immersion. It's a good fit for exposed helm and bilge locations.
Does it meet marine wiring standards?
Yes. It's built to SAE J1625, ABYC E-11, UL1077, and SAE J1171. The SAE J1171 rating means it's ignition protected for use where gasoline fumes could be present.
What comes in the package?
This part ships as a single breaker.
