ZFX-M302 AC100-240V DC12V 550MA Switching Power Module

The ZFX-M302 AC-to-DC Switching Power Module is a compact, high-efficiency power supply designed to convert a wide AC mains input range of 100–240V into a stable, well-regulated DC 12V output at 550mA (≈6.6W). Its small form factor and lightweight design make it ideal for embedding inside enclosures, lamp housings, smart devices, and DIY electronics projects where a clean 12V rail is needed but space is limited.

The module is built around a modern PWM (Pulse Width Modulation) switching topology, which delivers high efficiency above 80% while keeping the unit cool during operation — internal temperature rise is typically less than 25°C above ambient, eliminating the need for active cooling in most applications. Compared to old-style linear or transformer-based supplies, the ZFX-M302 is smaller, lighter, more efficient, and produces less heat.

A particular strength of this module is its clean, low-ripple output: ripple voltage is held to less than 20mV, making it suitable for sensitive analog circuits, audio applications, sensor front-ends, and microcontroller systems. The module has also passed EMC (Electromagnetic Compatibility) testing, ensuring strong anti-jamming performance and minimal interference with surrounding electronics.

For safety and reliability, the ZFX-M302 includes a complete suite of built-in protection circuits:

• Overvoltage protection — guards against output spikes that could damage your load
• Short-circuit protection — automatically shuts down if the output is shorted
• Overload protection — prevents damage if the connected load exceeds the rated current

The constant-voltage output is particularly well suited for 12V LED strip lighting, where stable voltage helps extend LED lifetime and reduce light decay over time. The module is also a great choice for powering Arduino projects (via the DC barrel jack), 12V relay modules, sensor arrays, fans, motors, IoT devices, security cameras, and small home automation systems.

Wiring

• AC Input (100–240V): Yellow + Red+Black (input pair)
• DC Output (12V / 550mA): Red (+) and Black (−) wires

Important Safety Notes:

• The module is non-waterproof — keep it dry and protect it from condensation and moisture.
• The AC input side carries mains voltage — installation should be done by a qualified person, with the mains disconnected during wiring.
• Always insulate AC connections properly and mount the module securely inside an enclosure.
• Do not exceed the rated 550mA continuous current.

Specifications

• Model: ZFX-M302
• Type: AC-to-DC switching power module
• Input Voltage: AC 100 – 240V
• Output Voltage: DC 12V
• Output Current: 550 mA
• Output Power: ≈ 6.6 W
• Topology: PWM switching
• Efficiency: > 80%
• Output Ripple: < 20 mV
• Temperature Rise: < 25°C above ambient
• Protections: Overvoltage, Short-circuit, Overload
• EMC: Passed EMC testing
• Waterproof: No (non-waterproof)
• Wire Outputs:
  • Yellow / Red+Black → AC input
  • Red (+) / Black (−) → DC 12V output

Applications

• 12V LED strip and LED lamp drivers
• Smart home and IoT device power supplies
• CCTV and security cameras (12V models)
• Sensor arrays and DIY measurement systems
• Arduino and Raspberry Pi 12V-powered projects (via DC barrel jack)
• Relay modules and small motors running at 12V
• DC fans and ventilation systems
• Door locks, magnetic locks, and access control systems
• Small appliances and consumer electronics
• Embedded electronics inside enclosures and lamp housings
• DIY power supplies for prototyping
• Industrial control and automation modules
• Electronics workshop and laboratory bench supplies