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AC-DC Isolated Power Supply Module — 220V to 5V 3.5W / 12V 5W, PCB Mount, Arduino
AC-DC Isolated Power Supply Module 220V to 5V 3.5W / 12V 5W, PCB Mount, Arduino
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AC-DC Isolated Power Supply Module — 220V to 5V/12V PCB Mount
A compact isolated AC-DC switching power supply module designed for direct PCB mounting. Converts 85–265VAC mains input to regulated 5V DC (3.5W) or 12V DC (5W) output with full galvanic isolation. Operating range of -40°C to +85°C makes it suitable for industrial, IoT, and embedded control applications where a compact mains-powered supply is needed without an external adapter.
Key Specifications
| Parameter | 5V Variant | 12V Variant |
|---|---|---|
| Input Voltage | 85–265VAC / 120–370VDC | 85–265VAC / 120–370VDC |
| Output Voltage | 5V DC | 12V DC |
| Output Power | 3.5W | 5W |
| Output Current | 700mA | 417mA |
| Isolation Voltage | 3000VAC | 3000VAC |
| Efficiency | ~75% | ~78% |
| Ripple & Noise | <100mV pk-pk | <120mV pk-pk |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C |
| Protections | OVP, OCP, SCP | OVP, OCP, SCP |
| Mounting | PCB through-hole pins | PCB through-hole pins |
Why Choose This Module?
- ✅ Direct mains input — no external transformer or adapter needed
- ✅ 3000VAC isolation — full galvanic isolation for safety and noise immunity
- ✅ PCB mount — through-hole pins for direct board integration
- ✅ -40°C to +85°C — industrial temperature range for harsh environments
- ✅ Compact size — fits in tight enclosures alongside control circuitry
Compatible With / Works With
- Arduino UNO/Nano embedded in 220V control panels (5V variant)
- ESP8266 / ESP32 IoT devices powered from mains (5V variant)
- Relay module power supply in 220V automation panels (12V variant)
- RS-485 / Modbus industrial sensor nodes (12V variant)
- Smart home switch modules (5V for MCU + 12V for relay coil)
Typical Applications
- Industrial Control Panel — 5V supply for PLC I/O module or HMI microcontroller
- Smart Switch / Dimmer — embedded 5V supply for ESP8266 WiFi smart switch
- IoT Gateway — mains-powered ESP32 sensor node without external adapter
- Relay Driver — 12V supply for relay coil in 220V automation circuit
- LED Driver Supply — 12V for LED strip in mains-powered luminaire
Safety Notice
⚠️ This module connects directly to mains voltage (220V AC). Ensure proper insulation, enclosure, and compliance with local electrical safety regulations. Always de-energize before handling. Not suitable for open-air use without an enclosure.
FAQ
Q: Can this module power an Arduino and relay simultaneously?
A: The 5V/700mA variant can power an Arduino UNO (~200mA) and a 5V relay module (~70mA per relay). For 4+ relays, use the 12V/5W variant with a 5V relay board that accepts 12V coil voltage.
Q: Is this module CE/UL certified?
A: Please verify certification markings on the physical module. For safety-critical applications, confirm compliance with your regional standards (CE, UL, RoHS) before deployment.
Q: What is the no-load power consumption?
A: Typically <0.5W at no load, making it suitable for always-on IoT applications with minimal standby power draw.
Package Contents
- 1× AC-DC Isolated Power Supply Module (voltage/power per variant selected)
