Sea-Dog 420123-1
Five blade terminals; the toggle tip is white when off and red when on. It is a three-position selector.
Identify Sea-Dog Light-Tip, Rocker & Brass Toggle Switches
A lighted switch tip, a lighted rocker and a plain brass toggle can look similar from a distance yet call for different wiring and panel openings. Sea-Dog 420123, 420441 and 420465 are all 15A/12V DC controls, but their contact arrangements, mounts and illumination are different. The 420479 cap is only protective hardware.
Identify the original marine control
Compare the exact manufacturer number rather than relying on front appearance. On narrow screens, scroll the chart sideways to see the complete specifications.
| MPN | Component | Electrical action | Mounting | Rating |
|---|---|---|---|---|
| 420123-1 | Light-tip toggle | Maintained SPDT on/off/on | 15/32-in mounting hole | 15A at 12V DC |
| 420441-1 | Snap-in illuminated rocker | Maintained SPST on/off | 1-1/8 × 1/2-in cutout | 15A at 12V DC |
| 420465-1 | Brass on/off toggle | Maintained SPST on/off | Drawing A 3/8; B 7/16 in | 15A at 12V DC |
| 420479-1 | Toggle protective cap | Accessory only, no switch contacts | Match specified switch | Not applicable |
Do not swap switch functions: 420123-1 has five blade terminals for its SPDT on/off/on circuit. 420441-1 is a lighted SPST on/off rocker with three blade terminals. 420465-1 is a plain brass SPST on/off toggle with two screw terminals. 420479-1 is a protective cap—not a switch.
Panel dimensions: For 420123-1, Sea-Dog specifies a 15/32-inch mounting hole and a maximum 1/4-inch panel. The 420441-1 rocker snaps into a 1-1/8 × 1/2-inch slot. The 420465-1 brass toggle allows a maximum 3/8-inch panel and supports the separately sold 420479-1 cap.
For original specifications and installation guidance, see the manufacturer's references: Sea-Dog light-tip toggle, Sea-Dog illuminated rocker, Sea-Dog brass toggle and cap.
Before selecting a replacement
- Determine the number of switch positions: 420123-1 has on/off/on; 420441-1 and 420465-1 are maintained on/off.
- Count the rear connections; the SPDT light-tip toggle uses five blades including illumination connections, while the brass toggle uses two screw terminals.
- Measure the panel. The light-tip toggle uses a 15/32-inch hole; the snap-in rocker uses a 1-1/8 × 1/2-inch rectangular cutout.
- Check whether illumination is required. The light-tip toggle changes from white off to red on; the 420441-1 rocker lights red when on.
- Use a compatible cap only when the manufacturer lists one for the exact toggle, and protect the branch circuit correctly.
Exact catalog product matches
These exact products link to UsedRVParts listings. Review the stated condition and availability; viewing and pickup in Kelowna are by appointment.
Sea-Dog 420441-1
Red-illuminating rocker with three 1/4-inch blade terminals. Not the same opening as the light-tip toggle.
Sea-Dog 420465-1
Brass two-screw-terminal toggle. Sea-Dog lists separate waterproof cap 420479-1.
Sea-Dog 420479-1
Protective cap listed by Sea-Dog alongside 420465-1; does not provide switching by itself.
Related marine parts references
For more marine switch configurations, see the Sea-Dog toggle switch identification guide and the Contura rocker identification guide. These references cover different contact arrangements, not guaranteed replacement fits.
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