Sea-Dog 420123-1
Five blade terminals; the toggle tip is white when off and red when on. It is a three-position selector.
Sea-Dog Light-Tip Toggle vs Rocker & Brass Toggle Guide
Marine switches need to match both the electrical function and the physical panel. Sea-Dog's 420123 light-tip toggle is a three-position SPDT selector, 420441 is an illuminated two-position snap-in rocker, and 420465 is a brass on/off toggle with a separately available protective cap. They're not interchangeable just because they share a 15A rating.
Compare switch operation and mounting
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.
What to check before ordering
- 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.
Find the matching Sea-Dog hardware
These product listings are for online ordering through NewRVParts. Goods ship from supplier warehouses; in-person viewing and pickup aren't available.
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 maintained and momentary toggle comparison and the Contura and illuminated rocker guide. These references cover different contact arrangements, not guaranteed replacement fits.
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