AC to DC 5V 700mA / 12V 300mA Isolated Mini Power Supply Module
AC to DC 5V 700mA / 12V 300mA Isolated Mini Power Supply Module
AC to DC Isolated Mini Switch Power Supply Module – 5V 700mA / 12V 300mA, 3.5W
This compact isolated switch-mode power supply module converts AC mains voltage (50V–277V AC) down to a stable DC output of either 5V at 700mA or 12V at 300mA — delivering up to 3.5W with approximately 80% efficiency. Its ultra-small form factor makes it ideal for embedding inside enclosures, DIY electronics projects, smart home devices, relay boards, LED drivers, and microcontroller circuits where a full-size power adapter simply won't fit.
Built with isolated topology for improved safety, the module features comprehensive output protection including overvoltage, overcurrent, overtemperature, and short-circuit protection — giving you peace of mind in your builds. Multiple modules can even be wired in parallel to scale current output as needed.
Made in Mainland China.
Key Features
- Two output options: DC 5V / 700mA or DC 12V / 300mA (3.5W total output power)
- Wide input range: AC 50V–277V / DC 70V–390V — compatible with global mains voltages (110V, 220V, etc.)
- Isolated design: Provides galvanic isolation between input and output for safer operation
- Efficiency: ~80% under full load
- Compact & embeddable: Mini footprint designed to fit inside junction boxes, enclosures, and panels
- Green LED output indicator for at-a-glance status monitoring
- Full protection suite: Overvoltage, overcurrent, overtemperature, and short-circuit protection
- Parallel operation: Multiple modules can be paralleled for higher current applications
- Long capacitor lifespan: 105°C rated capacitors, 10,000 hours rated; estimated 20–50 years at room temperature
- Working temperature range: -20°C to +70°C (not recommended for continuous use above 70°C)
Electrical Specifications
DC 5V / 700mA Output Version
- Output Voltage: 5V ±0.15V (no-load to full load)
- Output Current: Up to 700mA (constant current mode at full load)
- Output Power: 3.5W
- Ripple (50% load): ~60mV
- Test Resistance: 7Ω (4.9V output)
- Efficiency: ~80%
- Indicator: Green LED
DC 12V / 300mA Output Version
- Output Voltage: 12V −0.05V / +0.3V (no-load to full load)
- Output Current: Up to 300mA (constant current mode at full load)
- Output Power: 3.5W
- Ripple (50% load): ~100mV
- Test Resistance: 40Ω (12V output)
- Efficiency: ~80%
- Indicator: Green LED
What's in the Box
- 1 × AC 220V to DC 5V or DC 12V Isolated Power Supply Module
Great for Use With
This module pairs perfectly with other electronics components. Check out these related products from our store:
- Non-Contact Capacitive Water Level Sensor 3.3V–5V — a great 5V-powered sensor to integrate with this module
- 50Pcs Nickel Sheets for 18650 Battery Spot Welding Tool — for battery and power-related DIY builds
- Molex Mini-Fit Jr 4-Pin 4.2mm Pitch Wire-to-Board Housing — ideal connectors for wiring up your power supply module
Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: What is the input voltage range for this AC to DC power supply module?
A: The module supports a wide input range of AC 50V–277V or DC 70V–390V, making it compatible with standard mains voltages worldwide including 110V and 220V/240V AC systems.
Q: Can I use this module for a 5V Arduino or microcontroller project?
A: Yes — the 5V / 700mA output version can power many microcontrollers and small electronics directly from mains voltage. The isolated design adds an extra layer of safety when working with low-voltage circuitry connected to AC mains.
Q: Can multiple modules be used together to get more current?
A: Yes. The output characteristics of this module support parallel operation, meaning you can connect two or more identical modules in parallel to increase total available current for your application.
Q: What protections are built into this power supply module?
A: The module includes overvoltage protection, overcurrent protection, overtemperature protection, and short-circuit protection, helping safeguard both the module and your connected load during fault conditions.
Q: Is there a 12V version available?
A: Yes — the module is available in two output configurations: DC 5V at 700mA or DC 12V at 300mA. Please select the correct variant for your project before ordering.
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.