2 Pack DCDC 5A Buck Converter 438V to 12536V Step Down Voltage Regulator High Power Module with LED Display

Features: - High power DC-DC step down module - Thickened circuit boards - Advanced solid-state capacitor - Short circuit and over-temperature protection - 100% tested, sealed in anti-static packaging Kindly Note: 1. Input voltage must be 1.5 V higher than the output voltage, no boost 2. Do not reverse the input and output interface 3. Keep output under 5A (or 75W), and use a heat sink when for a long time working How to Calibrate the Digital Tube Voltmeter (Optional steps for the person who need a highly accurate voltage value) 1. Short press the left "ON/OFF" button to start up the digital tube voltmeter. Long press(>1s, <4 seconds) the left button to shut down the digital tube voltmeter. 2. Long press(>4 seconds) the left button to enter self-calibration of voltage measurement(calibration range: -0.5-0.5V, factory setting is 0.0). "IN" indicator lights = input voltage measurement calibration starts. Then, long press(>2 seconds) the right "Mode" button, "OUT" indicator lights = output voltage measurement calibration starts. Tap the left / right button to reduce / rise by one unit (since the voltage value of one unit is less than 0.1V, you need to 1-5 times tap the button continuously, so that the voltmeter can change by 0.1V) 3. After calibration, long press(>2 seconds) the right "Mode" button to preserve the adjusted value(no loss with outage) and back to normal voltage display. Specifications: - Model: Xl4015E / Digital Tube Voltmeter - Input Voltage: DC 4V - 38V - Output Voltage: DC 1.25V - 36V (adjustable) - Output Current: 0-5A ( recommended working current < 4.5A) - Conversion Efficiency: 96% (max.) - Switching Frequency : 180KHz - Operating Temperature: -45? to +85? - Size(L x W x H): 62*38*14mm - Weight: 32g Package List: 2x DC-DC buck converter module with LED display 8x Copper cylinder / screw nut 2x Heat sink