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Add more output voltage options to your 3D printer.  Have a 24V system but want to use the quite Noctua fans for PWM fan control?  Drop your voltage for your fan to 12V or 5V.  Solder contacts on back of board to fix at a certain voltage or an adjustable voltage controlled by a potentiometer.

ADJUSTABLE VERSION:

Default mode is adjustable voltage by potentiometer.

• input voltage : 4.5-24V
• Output Current :  3A (MAX) actual testing input 12V output 1.5A
• Output Voltage: adjustable and fixed output chosen by soldering back contacts
• Adjustable Range: 0.8-17V, fixed voltage (1.8V 2.5V 3.3V 5V 9V 12V)
• Efficiency : Up to 97.5% (6.5 to 5V 0.7A)
• Switching frequency : 500KHZ
• Output ripple : 20mV (12V to 5V 3A),20M band width
• Quiescent Current: 0.85MA
• Load regulation: ± 1%
• Voltage regulation: ± 0.5%
• Dynamic response speed : 5% 200uS 
• Output Overvoltage Protection : no
• Output short circuit protection : Yes ( not for a long time ) 
• Input Reverse Polarity Protection : no 
• Connecting Type:soldering
• Soldering Hole Space:2.54mm 
• EN : enable port ; IN+ : Input positive ; GND : common negative ; VO+ : output positive 
• Size : 20mm x 10.8mm x 5.2mm 

12V VERSION:

• input voltage: 14-40V
• output voltage: 12V
• output current: 0.8 A max
• quiescent current: ~1.5mA
• working frequency: 550kHz
• efficiency: 75-90%
• overtemperature shutdown
• short circuit protection
• BS-voltage protection
• input under voltage protection
• 2.54mm pin pitch
• common ground pin
• board size: 10 mm x 18 mm

Buy a DC-DC step down buck converter from Spool3D for your 3D printer in Canada without the surprise cost of the exchange rate!