The Square D QOB170is a 70 A Miniature Circuit Breaker designed for use in electrical systems with a voltage rating of 120/240 Vac. This circuit breaker is a 1-pole model from Square D, a well-known brand in electrical equipment. With a current rating between 61-70A the QOB170 is suitable for protecting circuits from overloads and short circuits in various industrial and commercial settings.