{"product_id":"sierra-un42000-marine-momentary-push-button-switch-spst-mom-on-off-10-amp-12v-die-cast-with-silver-contacts","title":"Sierra UN42000 Push Button Switch, Momentary On-Off SPST, 10 Amp 12 Volt","description":"\u003cp\u003eThe Sierra UN42000 is a momentary on-off SPST push button switch built for marine electrical panels and helm applications where a rugged, waterproof control is required. The switch operates on a momentary on-off circuit: press to close the circuit, release to open it, making it well suited for horns, bilge pumps, trim tabs, windshield wipers, and other accessory circuits that call for a push-and-hold control rather than a fixed toggle position.\u003c\/p\u003e\u003cp\u003eConstruction is extra heavy duty die cast metal for long-term durability in a marine environment, with silver contacts that resist corrosion and maintain reliable conductivity under repeated cycling. A rubber boot nut seals the actuator against water intrusion at the panel face, and the switch terminates in two boss screw terminals for a secure, vibration-resistant wire connection. The switch is rated 10 amps at 12 VDC, matching typical 12-volt marine accessory loads, and is designed for handlebar or panel mounting.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e UN42000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch Type:\u003c\/strong\u003e Push Button\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch Operation:\u003c\/strong\u003e Momentary On-Off (SPST)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 10 Amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 12 Volts DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Type:\u003c\/strong\u003e Normally Open\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Material:\u003c\/strong\u003e Silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e 2 Boss Screw Terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e Die Cast\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoot Material:\u003c\/strong\u003e Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIngress Protection Rating:\u003c\/strong\u003e IP54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Handlebar Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (L x W x H):\u003c\/strong\u003e 5.5 x 2.88 x 1.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282368036\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does momentary on-off SPST mean for the Sierra UN42000 switch?\u003c\/strong\u003e It means the UN42000 only closes the circuit while the button is held in; releasing the button returns it to the off position, and SPST indicates a single-pole, single-throw contact arrangement with one circuit being switched.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the amp and voltage rating of this switch?\u003c\/strong\u003e The Sierra UN42000 is rated 10 amps at 12 volts DC, sized for standard 12-volt marine accessory circuits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UN42000 waterproof enough for helm or deck mounting?\u003c\/strong\u003e Yes, it carries an IP54 ingress protection rating and uses a rubber boot nut seal at the actuator, giving it splash and dust resistance suitable for marine panels.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the terminals like on this switch?\u003c\/strong\u003e The UN42000 uses 2 boss screw terminals, which accept ring or spade connectors for a secure, vibration-resistant wire connection rather than quick-disconnect blades.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the switch housing made of?\u003c\/strong\u003e Sierra builds the UN42000 with an extra heavy duty die cast metal housing and silver contacts for durability and reliable conductivity over repeated use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions and weight of the UN42000 push button switch?\u003c\/strong\u003e The switch measures 5.5 x 2.88 x 1.75 inches and weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this switch be used for a horn or bilge pump circuit?\u003c\/strong\u003e The momentary on-off SPST action of the UN42000 makes it a good fit for push-to-activate circuits such as horns, bilge pumps, or windshield wipers where the accessory should only run while the button is pressed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket equivalent?\u003c\/strong\u003e The UN42000 is a genuine Sierra push button switch, not a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat mounting style does the UN42000 use?\u003c\/strong\u003e It is designed for handlebar or panel mounting, with the rubber boot nut sealing the actuator at the mounting surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the contacts on this switch silver or a base metal?\u003c\/strong\u003e The UN42000 uses silver contacts, chosen for their corrosion resistance and consistent electrical conductivity in a marine switch.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988458057947,"sku":"SIE-UN42000","price":20.71,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/UN42000__59728.1722379771.500.750.jpg?v=1785189022","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-un42000-marine-momentary-push-button-switch-spst-mom-on-off-10-amp-12v-die-cast-with-silver-contacts","provider":"Good Vibes Marina","version":"1.0","type":"link"}