The Square D QOU150 1 Pole Circuit Breaker offers strong protection against overload conditions and overcurrent. It comes with a unit mount for ease of installation on most surfaces. Made for use with both AC and DC supplies, it has AC and DC voltages of 120/240 V AC and 48 V DC respectively. Tested for quality, this unit is UL listed and has received CSA and IEC certifications. When the current in the circuit increases and reaches a high value, like in the case of a short circuit, it cuts off the power supply to prevent damage to devices. It also offers overload protection to prevent damage to heavy-duty devices like motor and air conditioners. The circuit breaker has current and interrupting ratings of 50 Amp and 10 kAIC respectively.