HLK-PM03 230V to 3.3V Step-Down Converter

The HLK-PM03 module from Hi-Link converts mains voltage into 3.3 V DC. Rectifier, converter and regulator sit in the potted housing, and the pins are soldered into a circuit board. This makes the module suitable for powering 3.3 V microcontrollers such as ESP8266 or ESP32 directly from 230 V.

Caution: Working with 230 V is dangerous and can lead to fatal accidents. The module may only be used by qualified personnel. No liability is accepted for damage caused by improper use.

Recommended alternative with 5 V at the output: HLK-PM01 230V to 5V Step-Down Converter

Recommended Accessories:

• Fuse Holder Clip for PCB Mounting
• Fine Fuse Set 100pcs. 5x20mm assorted
• 2P PCB Terminal RM5.08 with Screw Connection
• Electrolytic Capacitor Set 120 Pieces assorted

Features:

• Compact potted design for soldering
• Input 100 V to 240 V AC according to the marking, range 90 V to 264 V AC
• Overload and short-circuit protection at the output
• No-load power below 0.1 W
• Pins AC, AC, +Vo, −Vo labelled on the housing

Application Examples:

• Powering 3.3 V microcontrollers such as ESP8266 or ESP32 from the mains
• Smart home circuits with mains connection

Documentation:

• Guide to the HLK-PM03 with protection circuit (Random Nerd Tutorials)
• Project example with HLK-PM03 (Random Nerd Tutorials)

Technical Data:

• Input according to marking: 100 V to 240 V AC, 0.1 A, 50 Hz to 60 Hz
• Input range: 90 V to 264 V AC
• Output: 3.3 V DC, 0.9 A
• Power: 3 W
• No-load power: < 0.1 W
• Protection: overload and short circuit at the output
• Accuracy: ±0.1 V
• Efficiency at 230 V: > 70 %
• Operating temperature: -20 °C to +60 °C
• Certification: UL and CE
• Pins: AC, AC, +Vo, −Vo
• Dimensions: 34 × 20 × 15 mm
• Weight: 19 g

Scope of Delivery:

• 1× HLK-PM03 230V to 3.3V Step-Down Converter