KNACRO DCDC 12V to DC 42V 3A 126W StepDown Power Supply Module Car Power Converter Module Synchronous Buck Aluminum Shell

Synchronous rectification, low heat, stable and reliable. High conversion rate, the highest conversion rate of 90% or more. Multiple protection: over-current protection, reverse polarity protection, thermal protection. Dustproof, waterproof, moisture, shock for a variety of harsh environments. Wiring: Red line: positive input; the black wire: negative; yellow line: positive output. Input voltage: 12V. Output voltage: 4.2V . Output Current: 3A MAX. Power:12.6W. Conversion efficiency: 90%. Over-current protection: 3.5A. Working temperature ?-25 ~ 60 ?. Size: 35 * 25 * 21mm/1.38*0.98*0.83?L*W*3H?. Installation Cable length: 13 ~ 14cm. Weight: 30g / 1.06oz. Package Included: 1*DC-DC 12V to DC 4.2V 3A 12.6W Step-down power supply module