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Mercury 27W Switch-Mode Power Supply - 2250mA, 3-12V DC Selectable Output

£1799
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Description

The 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.

Designed 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.

The 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.

Specification
Power max. 27W
Adaptor plugs 3.5mm 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
Input voltage 100-240Vac, 50/60Hz
Output current max. 2250mA (all output voltages)
Output voltage 3/4.5/5/6/7.5/9/12Vdc
Dimensions 88 x 51 x 47mm
Weight 210g
Downloads

Product Manual

Frequently Asked

What voltage should I select for my device?

Check 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.

What is the maximum current draw at 12V?

The 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.

How do I know which DC plug to use?

Match 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.

Can this power a CCTV camera?

Most 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.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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    Description

    The 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.

    Designed 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.

    The 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.

    Specification
    Power max. 27W
    Adaptor plugs 3.5mm 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
    Input voltage 100-240Vac, 50/60Hz
    Output current max. 2250mA (all output voltages)
    Output voltage 3/4.5/5/6/7.5/9/12Vdc
    Dimensions 88 x 51 x 47mm
    Weight 210g
    Downloads

    Product Manual

    Frequently Asked

    What voltage should I select for my device?

    Check 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.

    What is the maximum current draw at 12V?

    The 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.

    How do I know which DC plug to use?

    Match 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.

    Can this power a CCTV camera?

    Most 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.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.