Features: Wide applications, battery chargers, stereos, for cars, trucks, buses, ships, recreational vehicles, trailer motors, etc, bring your life more convenience. With protective cover avoid electrical shorts and corrosion, durable and waterproof, can protect the internal circuit breaker well. The car circuit breaker is equipped with a plastic for shell, which can effectively protect from corrosion, circuit breaker boot insulates your circuit from shorting out by protecting it from the elements in power leads and automotive applications, and the insulating plastic can reduce the risk of electric shock for users. Fuse with thermal automatic reset feature, circuit breaker allows you to use electrical appliances safely and securely. It offers power protected when circuit is overloaded/ shorting by this over-current circuit breaker. High and low temperature resistance. Circuit breaker is plastic,can be Mounted in any Orientation. Specifications: Material:Alloy+Copper+ABS Size:Approx.4x2.1x4cm/1.57x0.94x1.57inches SAE J553;SAE J1171;UL1500" Voltage: 14-28vdc Rated current: 30A/40A/50A Installation: portrait/landscape Reset type: T1 automatic reset Operating temperature: -40 degrees Celsius (-40 degrees Fahrenheit) to 85 degrees Celsius (185 degrees Fahrenheit) Interruption capacity: 2.5 kA, 12Vdc Storage temperature: -40 degrees Celsius (-40 degrees Fahrenheit) to 125c (260f) Type1:Rated current: 20A Type2:Rated current: 30A Type3:Rated current: 40A Type4:Rated current: 50A Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1 Set Circuit Breaker