Brand: QSKJ Model: QS-4805CBAN-90W Parameters: Module Properties: Non-isolated step-down module (buck) Dimension: 72 (L) * 42 (W) * 23 (H) mm ( not Include mounting ear) Input voltage: 4.5-60V Output Voltage: 1.25-30V (adjustable) Output current: Maximum 3A Conversion efficiency: Up to 92% (O/P voltage higher, the higher the efficiency) Switching Frequency: 150KHz Rectifier: Non-Synchronous Rectification Short circuit protection: Current limiting (while output voltage < 20V), auto recovery Input reverse protection: Yes Operating temperature: Industrial grade (-40 to +85 ) (output power 10W or less) Full load temperature rise: 40 Load regulation: ± 0.5% Voltage regulation: ± 0.5% Dynamic response speed: 5% 200uS Connection mode: Welded, plus pin can be directly soldered PCB. Protection: Over-current limitation and auto recovery Waterproofing: All epoxy sealed containers with Waterproof Die-Cast Aluminum Housing Some Applications Buck: 12V 24V 36V 48V battery, Input can withstand up to 60V, output stable 3.3V 5V 9V 12V 24V and so on.