12V 400mA AC-DC Switching Power Supply Module – Vertical Isolation

Power your electronics projects with confidence using this compact 12V 400mA AC-DC Switching Power Supply Module. Featuring vertical board orientation and full AC-to-DC isolation, this module efficiently converts 220V AC mains input down to a stable 12V DC output — making it an ideal embedded power solution for DIY electronics, automation systems, smart home devices, and more.

Key Features

Output Voltage: 12V DC
Output Current: 400mA (max)
Input Voltage: AC 85–265V wide range (compatible with 110V and 220V mains)
Topology: Isolated switching power supply — keeps your low-voltage DC circuit safely separated from the high-voltage AC mains
Vertical PCB Mounting: Space-saving upright board design, ideal for compact enclosures and tight builds
High Conversion Efficiency: Low heat generation thanks to modern switching technology
Compact & Lightweight: Easy to integrate into custom enclosures, PCBs, or breadboard setups
Wide Application: Suitable for Arduino projects, sensor modules, LED drivers, relay boards, IoT devices, and more

Why Choose an Isolated Switching Module?

Unlike non-isolated converters, this module uses transformer-based galvanic isolation between the AC input and DC output. This is a critical safety feature when your project interfaces with other electronics or requires a clean, noise-free power supply. The switching design also delivers much better efficiency compared to linear regulators, keeping your builds cooler and more energy-efficient.

What's Included

1 × 12V 400mA AC-DC Switching Power Supply Module (Vertical Isolation)

Compatible Projects & Use Cases

Smart home automation controllers
LED strip or module power supplies
Arduino / microcontroller power input
Relay & solenoid driver boards
IoT gateway & sensor nodes
Industrial control panel auxiliary power

Frequently Asked Questions

Q: What does the 12V 400mA AC-DC Switching Power Supply Module do?

A: This module converts AC mains power (85–265V AC) into a stable 12V DC output at up to 400mA. It's designed for embedding directly into electronics projects, automation systems, or custom enclosures that require a reliable, isolated DC power source.

Q: What does "vertical isolation" mean on this power supply module?

A: "Vertical" refers to the upright PCB mounting orientation, which saves horizontal space in compact enclosures. "Isolation" means the module uses galvanic isolation (via a transformer) between the high-voltage AC input and the low-voltage DC output, providing an important layer of electrical safety for your circuit.

Q: Is this module safe to use in DIY and hobbyist electronics projects?

A: Yes — the isolated design ensures the DC output side is electrically separated from the mains AC input. However, as with any AC mains-connected component, it must be handled with appropriate care, installed in a suitable enclosure, and wired by someone with basic knowledge of electrical safety practices.

Q: What kind of devices can I power with a 12V 400mA output?

A: This module is well-suited for powering microcontrollers (such as Arduino boards), relay modules, LED strips, sensors, IoT nodes, and other low-power 12V DC devices that draw up to 400mA (4.8W) of current.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.