_x000D_ This is a set of 10 pieces DC-to-DC buck(step-down) power converter modules which step down voltage from their input (supply) to their output (load). These buck module can be remarkably efficient (maximum 96%), making them useful for voltage step-down that input voltage is higher than output voltage, such as accumulator, power transformer, DIY adjustable regulated power supply, laptop power supply on car and industrial equipment. _x000D_ _x000D_ _x000D_ Features: _x000D_ These are buck converter modules used for voltage step-down that input voltage is higher than output voltage. _x000D_ The input voltage range is 4V to 38V DC, and the output voltage is adjustable from 1.25V to 36V._x000D_ _x000D_ These buck module can be remarkably efficient, and the maximum efficiency can be up to 96%), making them very useful. _x000D_ _x000D_ This set contains total 10 pieces DC-DC buck modules that you can use for many different projects. _x000D_ They are great step-down modules for accumulator, power transformer, DIY adjustable regulated power supply, laptop power supply on car and industrial equipment._x000D_ _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Type: Non-isolated DC-DC step-down module _x000D_ Input Voltage: 4V to 38V _x000D_ Output Voltage: 1.25V to 36V(adjustable continuously) _x000D_ Output Current: 0A to 5A _x000D_ Output Power: 75W _x000D_ Operating Temperature: -40C~+85C _x000D_ Frequency: 180KHz _x000D_ Efficiency: 96%(Max.) _x000D_ Load Regulation: S (I)0.8% (input 24V, output 12V, load measured from 1~4.5A variation) _x000D_ Voltage Regulation: S (u)0.8% (output 12V, 4A, voltage measured from 18~32V variation) _x000D_ Short Circuit Protection: Yes ( limit current 8A) _x000D_ Over Temperature Protection: Yes (shut off output automatically) _x000D_ Mounting Method: 2pcs 3mm screws _x000D_ Wiring Method: Soldering _x000D_ Size: 54 x 23 x 15mm / 2.12 x 0.9 x 0.59" _x000D_ Quantity: 10 _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 10 x Step-down Voltage Modules _x000D_ _x000D_ _x000D_ Note:_x000D_ Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.