{"product_id":"thermosphere-contactor-snubber","title":"ThermoSphere Contactor Snubber for Underfloor Heating","description":"\u003ch2\u003eControl High-Load Underfloor Heating from a Single Thermostat\u003c\/h2\u003e\n\u003cp\u003eThe ThermoSphere Contactor Snubber lets electricians control electric underfloor heating systems with a total load over 16A from a single thermostat. Once the connected load exceeds the maximum switching capacity of a standard thermostat, a contactor snubber steps in to safely switch the higher current while protecting the thermostat's relay from arcing and premature wear.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAllows one thermostat to control high-load underfloor heating systems\u003c\/li\u003e\n\u003cli\u003eSnubber circuit protects the thermostat relay for a longer service life\u003c\/li\u003e\n\u003cli\u003eIP30 rated and double insulated, safe for home and commercial use\u003c\/li\u003e\n\u003cli\u003eAvailable in 25A, 40A and 63A ratings to suit the size of the job\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eSpecified by electricians and underfloor heating installers on larger domestic and commercial installations — extended kitchens, open-plan living spaces, multiple bathrooms or large tiled areas — where the total connected heating load exceeds the 16A a standard thermostat can switch directly. Surface mounted alongside the consumer unit or heating control circuit.\u003c\/p\u003e\n\n\u003ch3\u003ePerformance \u0026amp; Features\u003c\/h3\u003e\n\u003cp\u003eRated for 230V supply and housed in a robust, double-insulated IP30 enclosure suitable for safe indoor use, the ThermoSphere Contactor Snubber switches the full heating load while being triggered by the low-current signal from a standard thermostat. This keeps thermostat components within their rated switching capacity, reducing wear and the risk of relay failure on higher-power systems.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eCompatible with all ThermoSphere thermostats and electric underfloor heating cable, mesh and foil systems. Choose the rating (25A, 40A or 63A) to match the total connected load of your heating circuit.\u003c\/p\u003e\n\n\u003cp\u003eAll electrical work should be carried out by a suitably qualified electrician in accordance with the relevant local safety regulations and standards. ThermoSphere is backed by Millcot's trade support — buy with confidence from a specialist UK underfloor heating and tiling supplier.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnables single-thermostat control of high load heating systems\u003c\/li\u003e\n\u003cli\u003eSnubber protection for the thermostat relay\u003c\/li\u003e\n\u003cli\u003eIP30 rated, safe for home use\u003c\/li\u003e\n\u003cli\u003eDouble insulated for added safety\u003c\/li\u003e\n\u003cli\u003eSurface mount enclosure\u003c\/li\u003e\n\u003cli\u003eAvailable up to 63A maximum load\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower supply: 230V\u003c\/li\u003e\n\u003cli\u003eSize: W 110 x H 180 x D 95mm (all ratings)\u003c\/li\u003e\n\u003cli\u003eProtection rating: IP30\u003c\/li\u003e\n\u003cli\u003eMounting: Surface mount\u003c\/li\u003e\n\u003cli\u003eDouble insulation: Yes\u003c\/li\u003e\n\u003cli\u003eLoad ratings available: 25A (CSN-025), 40A (CSN-040), 63A (CSN-063)\u003c\/li\u003e\n\u003cli\u003eCountry of origin: Germany\u003c\/li\u003e\n\u003cli\u003eWarranty: 3 years\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eEach unit supplied is one ThermoSphere Contactor Snubber in your selected load rating (25A, 40A or 63A), ready for surface mounting and wiring by a qualified electrician.\u003c\/p\u003e\n\n\u003ch3\u003eDownloads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0621\/5794\/7096\/files\/Contactor_Snubber_Data_Sheet.pdf?v=1786549632\" target=\"_blank\" rel=\"noopener\"\u003eThermoSphere Contactor Snubber Data Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhen do I need a contactor snubber?\u003c\/strong\u003e\u003cbr\u003eIf the total connected load of your electric underfloor heating exceeds 16A, you can't switch it directly from a single thermostat — you'll need a contactor snubber rated for your total load.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich rating should I choose?\u003c\/strong\u003e\u003cbr\u003eSelect 25A, 40A or 63A based on the total connected load of your underfloor heating circuit — add up the wattage of all connected elements and convert to amps, or ask your electrician to confirm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it safe for home use?\u003c\/strong\u003e\u003cbr\u003eYes, it's IP30 rated and double insulated for safe use in residential and commercial installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work with any thermostat?\u003c\/strong\u003e\u003cbr\u003eYes, it works with all ThermoSphere thermostats, using the thermostat's low-current signal to switch the higher-rated heating load.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere should it be installed?\u003c\/strong\u003e\u003cbr\u003eIt's a surface-mount enclosure, typically fitted near the consumer unit or heating control circuit by a qualified electrician.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWho can install this product?\u003c\/strong\u003e\u003cbr\u003eAll electrical work should be carried out by a suitably qualified electrician in accordance with local safety regulations and standards.\u003c\/p\u003e","brand":"ThermoSphere","offers":[{"title":"25A","offer_id":58168110317951,"sku":"CSN-025","price":124.99,"currency_code":"GBP","in_stock":true},{"title":"40A","offer_id":58168110350719,"sku":"CSN-040","price":169.99,"currency_code":"GBP","in_stock":true},{"title":"63A","offer_id":58168110383487,"sku":"CSN-063","price":199.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0621\/5794\/7096\/files\/a25728e5-ae4e-40f9-89b9-ec1576a1758f.jpg?v=1786602259","url":"https:\/\/www.millcot.com\/products\/thermosphere-contactor-snubber","provider":"MILLCOT","version":"1.0","type":"link"}