{"product_id":"mercury-27w-switch-mode-power-supply-2250ma-3-12v-dc-selectable-output","title":"Mercury 27W Switch-Mode Power Supply - 2250mA, 3-12V DC Selectable Output","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Mercury 27W is a switch-mode power supply delivering 2250mA at selectable DC voltages from 3V to 12V in seven fixed steps: 3V, 4.5V, 5V, 6V, 7.5V, 9V and 12V. The voltage is selected via a rotary dial on the PSU body. The unit ships with eight interchangeable DC barrel plugs covering the most common sizes (3.5mm jack through to 6.3 x 3mm) plus a USB adaptor, making it compatible with routers, CCTV cameras, set-top boxes, portable speakers, USB hubs and other low-voltage electronics.\u003c\/p\u003e\n\u003cp\u003eDesigned for household, office and workshop use, the Mercury PSU replaces multiple dedicated power supplies with a single adaptable unit. The switch-mode topology provides stable regulated output across all seven voltage settings and maintains efficiency above 80% under typical loads, reducing heat generation and running costs compared to linear transformer-based PSUs. The 100-240Vac input accepts UK, EU and US mains voltages without adjustment, useful when travelling or powering imported equipment.\u003c\/p\u003e\n\u003cp\u003eThe PSU measures 88 x 51 x 47mm and weighs 210g, small enough to fit behind TV units, under desks or in equipment racks without blocking adjacent sockets. The 1.5m output cable (approximate, check product manual for exact length) gives positioning flexibility, and the interchangeable plugs snap onto the cable end with a friction fit. The centre-positive polarity matches the majority of consumer electronics, but always verify polarity and voltage requirements before connecting a device.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower max.\u003c\/td\u003e\n\u003ctd\u003e27W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdaptor plugs\u003c\/td\u003e\n\u003ctd\u003e3.5mm jack, 2.35 x 0.75mm, 3.5 x 1.35mm, 4 x 1.7mm, 5 x 2.1mm, 5.5 x 2.1mm, 5.5 x 2.5mm, 6.3 x 3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput voltage\u003c\/td\u003e\n\u003ctd\u003e100-240Vac, 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current max.\u003c\/td\u003e\n\u003ctd\u003e2250mA (all output voltages)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput voltage\u003c\/td\u003e\n\u003ctd\u003e3\/4.5\/5\/6\/7.5\/9\/12Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e88 x 51 x 47mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e210g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/661406UK.pdf\" target=\"_blank\"\u003eProduct Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat voltage should I select for my device?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck the device's power input label or manual for the required DC voltage. The Mercury PSU offers seven fixed voltages: 3V, 4.5V, 5V, 6V, 7.5V, 9V and 12V. Select the voltage that matches your device exactly. Using the wrong voltage can damage the equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum current draw at 12V?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe PSU delivers 2250mA (2.25A) at all output voltages. At 12V this gives a maximum power output of 27W. Devices drawing more than 2250mA will overload the PSU and may cause it to shut down or overheat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know which DC plug to use?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the plug size to the device's power input socket. The most common sizes are 5.5 x 2.1mm and 5.5 x 2.5mm (both included). If you are unsure, consult the device manual or measure the socket with calipers. Polarity is centre-positive on all plugs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this power a CCTV camera?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMost 12V analogue CCTV cameras draw between 200-500mA, well within the 2250mA capacity of this PSU. Check the camera's power requirement label and ensure the DC plug size matches the camera's input socket. For IP cameras, verify the voltage requirement as some models use 5V or 9V.\u003c\/p\u003e","brand":"AVSL","offers":[{"title":"Default Title","offer_id":45313459716363,"sku":"661.406UK","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/661406UK_CO1_f5e31d65-c1f4-493e-9f7a-2794530ee8df.jpg?v=1715193482","url":"https:\/\/niori.co.uk\/products\/mercury-27w-switch-mode-power-supply-2250ma-3-12v-dc-selectable-output","provider":"Niori","version":"1.0","type":"link"}