{"product_id":"sierra-rs20040-contura-rotary-switch-on-on-on-1-2-3-11-rs20040","title":"Sierra RS20040 Contura Marine Rotary Switch – On-On-On, 3-Position (1-2-3), IP67, Definitive Detent","description":"\u003ch2\u003eSierra RS20040 Contura Marine Rotary Switch – On-On-On, 3-Position (1-2-3), IP67, Definitive Detent\u003c\/h2\u003e\u003cp\u003eThe Sierra RS20040 is a Contura marine rotary switch with a three-position On-On-On configuration labeled 1-2-3. All three positions are maintained active states — there is no off position. This layout is the standard configuration for marine battery selector switches, where Position 1 selects Battery Bank 1, Position 2 selects Battery Bank 2, and Position 3 connects both banks simultaneously. It is also suited to any three-source selection application where one of three active states must always be engaged.\u003c\/p\u003e\u003cp\u003eThe patented mechanism translates rotary motion into linear switching action, and a secondary cam provides definitive detent positions — the switch clicks firmly into each of the three positions with no ambiguity about which bank or source is selected. Sealed to IP67 for above-panel components. Fits industry-standard panel openings for straightforward installation in new builds and retrofits.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: 11-RS20040\u003c\/li\u003e\n\u003cli\u003eSeries: Contura\u003c\/li\u003e\n\u003cli\u003eSwitch Type: Rotary (patented rotary-to-linear mechanism)\u003c\/li\u003e\n\u003cli\u003eConfiguration: On-On-On, 3-position (1-2-3) — all positions maintained, no off position\u003c\/li\u003e\n\u003cli\u003eIllumination: None\u003c\/li\u003e\n\u003cli\u003eDetent: Secondary cam with definitive click positions\u003c\/li\u003e\n\u003cli\u003eSealing: IP67 (above-panel components)\u003c\/li\u003e\n\u003cli\u003ePanel Opening: Industry-standard fit\u003c\/li\u003e\n\u003cli\u003eNote: (On) in parentheses designates a momentary position\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMarine battery selector switch — Position 1: Battery Bank 1, Position 2: Battery Bank 2, Position 3: Both banks\u003c\/li\u003e\n\u003cli\u003eThree-source selection applications where one of three active states must always be engaged\u003c\/li\u003e\n\u003cli\u003eMarine helm panels requiring IP67-rated three-position rotary switches with definitive detent\u003c\/li\u003e\n\u003cli\u003eNew helm panel builds and retrofits using industry-standard panel openings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThe RS20040 is purpose-built for marine battery selector applications — the 1-2-3 labeling maps directly to the standard battery bank selection convention used on most marine electrical systems, and the definitive detent ensures the switch is always clearly in one of the three positions with no ambiguity about which bank is active. The On-On-On configuration means there is no off position, which is the correct behavior for a battery selector where you always want at least one bank connected. The rotary format gives a more precise, mechanical feel than a rocker switch, which is a meaningful advantage for a switch that controls your primary power source. For a two-position On-On rotary switch with a dual red\/green LED indicator, the \u003ca href=\"\/products\/sierra-rs20000-contura-marine-rotary-switch-on-on-red-green-led-ip67-definitive-detent\"\u003eSierra RS20000 Contura On-On Rotary Switch\u003c\/a\u003e is the two-position alternative. For a three-position On-Off-On rotary switch with a center-off and red LED, the \u003ca href=\"\/products\/sierra-rs20020-contura-marine-rotary-switch-on-off-on-red-led-ip67-definitive-detent\"\u003eSierra RS20020 Contura On-Off-On Rotary Switch\u003c\/a\u003e covers that application.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51250883657764,"sku":"11-RS20040","price":44.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/11-RS20040.jpg?v=1786511628","url":"https:\/\/marisolmarine.com\/products\/sierra-rs20040-contura-rotary-switch-on-on-on-1-2-3-11-rs20040","provider":"Marisol Marine Company","version":"1.0","type":"link"}