DC to DC converter / DC to DC Step down Input voltage: 20V DC to 30V DC Output voltage: 12V DC to 13.8V DC Standby current: 80mA Output power: 30A (continuous), 45A (maximum) Input fuse: 30A, Standard auto blade fuse (External) Output fuse:25A x2pcs, Standard auto blade fuse (Internal*l) Connection cable: 4.0mm2 / 900mm. Efficiency: 85% to 90% Thermal shutdown: 65+/-5 Cooling fan: Yes auto-operation fan (temperature or load) Input polarity reverse diode protection Output polarity reverse circuit protection Output short-circuit protection Overheating circuit protection Overload circuit protection. Operating temperature: 0~40 Storage temperature: -15~45 Operating relative humidity: 10%RH~102%RH Compliant standards: CE, EN61000, 2006/28/EC. Dimension: 222 x 115 x 62mm