This 15 Amp single pole small case 2 flat rocker circuit breaker from Blue Sea (PN: 7403) is a great choice. Its color actuator clearly shows the 'OFF' position. With a 'Trip Free' design, it won't stay 'ON' during a fault current. It's a magnetic hydraulic - trip free type, suitable for a maximum voltage of 250 Volts AC or 80 Volts DC, and has a rated switch cycles of 10,000 at rated amperage and voltage. Note that this product can expose you to chemicals like di(2 - ethylhexyl)phthalate (dehp), which may cause cancer, birth defects or other reproductive harm. Check P65Warnings.ca.gov for more info. The breaker has an amperage of 15a, box dimensions of 1'H x 3'W x 5'L and weighs 1 lbs, with a UPC of 632085074036.

Using this circuit breaker is easy. First, make sure the power is off before installation. Connect the wires according to the correct polarity. When in use, you can easily tell if it's off by looking at the color actuator. In case of a fault current, it will automatically trip to protect your circuit. Be aware that this product contains chemicals that may be harmful. Check P65Warnings.ca.gov for details. For maintenance, keep it clean and dry. If it trips frequently, there may be an issue with your circuit that needs to be checked. Don't try to force it to stay on during a fault current as it's designed to trip free for your safety.