This is a high performance DC to DC step-down adjustable power supply module, switching regulator.
Output current: rated current 2A, maximum 3A (need to add heat sink), if the output power greater than 20W, combined heat sink is proposed.
Double wiring, bottom large copper clad guarantee more good heat dissipation.
 

• Country of Manufacture: CHINA; Material: Plastic,Metal; Net Weight: 12g
• Package Content: 1 x Step Down Module; Model: LM2596S
• Main Color: Green; Product Name: Step Down Module
• Size: 43 x 20 x 10mm/1.69"x0.78"x0.39"(L*W*H); Input Voltage: 4.75-30V
• Output Voltage: 1.25-26V; Output Rated Current: 2A (Max. 3A)

Country of Manufacture: CHINA; Material: Plastic,Metal; Net Weight: 12guxcell