Identify Sea-Dog SD-17 Surface-Mount Circuit Breakers

For an SD-17 breaker attached to a flat surface rather than through a panel, look to the Sea-Dog 830220 series. These sealed thermal breakers have visible trip indication and ¼-28 stud connections, but each part number specifies a different current rating. Do not select a higher rating because the existing breaker trips.

Identify surface-mount SD-17 breakers

The table compares exact manufacturer numbers and separates electrical ratings from mechanical fit. On small screens, scroll horizontally to see all specifications.

Manufacturer diagram dimensions: A = 2-7/8 in, B = 1-7/8 in, C = 1-3/4 in, D = 2-3/16 in, E = 1-1/8 in. These are the manufacturer's labelled measurements, not all mounting-hole dimensions. See the linked original drawing for what each label measures.

Hi-Amp construction: Sealed IP67 housing with a manual reset and visible trip indication. Sea-Dog lists 3,000A interrupt capacity at 14V DC and 1,500A at 48V DC, with ignition protection to SAE J1171.

Manufacturer dimension and specification references: dimension diagram. These include the original switch and breaker drawings.

What to inspect before replacement

1. Check that the original breaker mounts on a surface, with sufficient clearance behind the studs and wiring.
2. Match the amp rating to the original marine circuit and size the cables and lugs as required.
3. Compare the case's A–E dimensions with the manufacturer's drawing before drilling mounting holes.
4. Verify ¼-28 stud hardware and the 48V DC maximum rating against the installed system.
5. Disconnect power and follow marine standards for secure connections, overcurrent protection and ignition-protected installations.

Matching part-number listings

Each card opens an exact UsedRVParts product listing. Check the stated condition and current availability; viewing and pickup in Kelowna are by appointment.

Sea-Dog 830220

25A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830221

30A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830222

40A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830223

50A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830224

60A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830225

70A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830226

80A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830227

100A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830228

120A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Sea-Dog 830229

150A sealed Hi-Amp breaker for surface mount; ¼-28 studs, 48V DC maximum.

Check listing condition and availability

Related Sea-Dog electrical guides

Continue with marine ignition switch types, compact SD-13 breakers, panel-mount SD-17 breakers. For more general electrical switching see our Sea-Dog toggle-switch identification guide. For inline fuse components, visit the Sea-Dog AGC fuse-holder identification guide.