Sierra RK40850 Compact Marine Rocker Switch – On-Off-On, SPDT, Maintained, 12/24VDC, AC Rated
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Sierra RK40850 Compact Marine Rocker Switch – On-Off-On, SPDT, Maintained, 12/24VDC, AC Rated
The Sierra RK40850 is a compact maintained On-Off-On SPDT (Single Pole, Double Throw) rocker switch with a high-profile rocker action that delivers a crisp, positive feel with every press. The SPDT configuration routes a single circuit to either of two outputs, with a center-off position in between — making it the standard choice for source selection, mode switching, and any application where you need to choose between two circuit paths with a clear off state.
Its compact body fits a standard rectangular panel cutout. Rated for both AC and DC operation — 12A at 125V AC, 10A at 250V AC, and suitable for 12V and 24V DC systems — making it a versatile option for mixed AC/DC panel builds.
Key Specifications
- Part Number: 11-RK40850
- Switch Type: Compact Rocker, On-Off-On (maintained)
- Circuit Configuration: SPDT (Single Pole, Double Throw)
- Action: Maintained both sides — stays in position when released; center-off between active positions
- AC Rating: 12A at 125V AC / 10A at 250V AC
- DC Rating: Suitable for 12V and 24V DC systems
- Panel Cutout: Standard rectangular
- Note: (On) in parentheses on any switch in this series designates a momentary position
Compatible Applications
- Source selection between two circuits with a center-off position
- Mode switching applications requiring two maintained active states and a clear off position
- Marine DC panels for 12V and 24V three-position switching
- AC circuit source selection on shore power panels
- Any panel using a standard rectangular rocker switch cutout requiring a maintained On-Off-On SPDT switch
- Replacement for worn or damaged compact On-Off-On SPDT rocker switches
Parts Desk Insights
The RK40850 is the standard compact SPDT switch for source selection and mode switching — the center-off position gives you a clear off state between the two active positions, which is the correct configuration for most switching applications where you want to confirm the circuit is off before changing direction or source. If you need both active positions to be momentary (springs back to center-off when released), the Sierra RK40870 Compact (On)-Off-(On) SPDT is the momentary alternative in the same compact series. For a no-off-position switch where the circuit must always be routed to one of two outputs, the Sierra RK40840 Compact On-On SPDT covers that application. For a simple maintained On-Off single-circuit switch, the Sierra RK40800 Compact On-Off SPST is the single-output alternative.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.