The input and output are highly isolated.
eBay
10W AC-DC Converter module AC 110V 220V 120v 230v to 5V 2A 3A DC Switching Power Supply Low ripple power board
Aliexpress UK
Suitable for devices up to 60W Only. Max output power: 60W. 12V Car to Mains Converter, Standard UK 3-pins Plug. Converts 100-240V AC household current to 12V DC power. NOTE It Support up to 12V 5A (upto 60W).
eBay
Step-Down Power Supply Module AC 100-264V to DC 5V 9V 12V 24V Converter Mini Buck Convert AC-DC Regulator Power Module
Aliexpress UK
Output Current: 25A. -COMPATIBLE : This 12V power converter is designed for connecting diesel heaters directly to household electricity, making it a practical tool for caravan, RV, garage, or indoor use.
eBay
10W AC-DC Converter module AC 110V 220V 120v 230v to 5V 2A 3A DC Switching Power Supply Low ripple power board
Aliexpress UK
600W Power Converters Aluminum Shell are designed with many heat dissipation holes, Built-in Cooling fan and dust-proof net, which effectively prevent dust from entering, ensure the stable rotation of the electric fan and prevent the circuit board from burning ; moreover, anti-skid pads are added to the bottom in this 240v to 12v converter, which can also make the bottom better heat dissipation and work more stable.
eBay
Full Power 12V 2A Power Supply Adapter US EU AU UK Plug in AC/DC Converter 100-240V AC to DC 12V 24W 2000mA Charger For CCTV LED
Aliexpress UK
Each module is built with high-quality components and includes a power indicator LED. Full bridge rectifier using 4x 1N4007 diodes. Smoothing capacitor: 1000μF 25V for reduced ripple. 16V AC → ~21.22V DC.
eBay
1-10PCS 10W AC-DC Converter module AC 110V 220V 120v 230v to 5V 2A 3A DC Switching Power Supply Low ripple power board
Aliexpress UK
Features: Universal Input: 110/220V AC; Output: 12V DC 20A Widely used in Industrial automation, LED display, CCTV, Radio, Computer Project, LED Strip Lights, 3D Printer etc. Circuit Short Protection, Overload Protection and Over Voltage Protection Ensures the Safety of Using This Power Supply Metal Enclosed Body is good for Heat Dissipation which Can Prolong the Lifespan of the Power Supply Suitable for DC 12V Single Color and RGB LED Strip Light, 12V LED Lighting and Other 12V Electronic Equipment .
eBay
200W DC-AC Power Inverter Transformer DC 12V to AC 12V Square Wave Signal Generator Voltage Regulator Power Converter Board
Aliexpress UK
Power: 1200W Max (load power cannot exceed 80% of rated power). Output current: up to 100A. Pressure resistance Input and output: 1.5KvAC input and housing; 1.5KvAC output and housing; 0.5KvAC. Shock resistance: 10～500Hz, 2G 10min, /1 cycle, duration 60 minutes, each axis.
eBay
LM2596HV AC/DC to DC Buck Step Down Converter Power Supply Module LM2596 3v 3.3V 5V 6V 9V 12V 15V 24V AC 5V-30V, DC 5V-50V
Aliexpress UK
OUTPUT: DC 12V. Size: Car Lighter Length: 5cm Width: 5cm Height: 3.3cm. If you are satisfied with our service, pls.
eBay
4.8W AC/DC to DC Power Supply Module AC 110V 220V 230V To DC 3.3V 5V 12V Mini Buck Converter Led Isolated Voltage Stabilized
Aliexpress UK