Black Circuit Breaker

This is a Square D QO Miniature Circuit Breaker, specifically a single-pole, 15 Amp model. Type: Single-pole miniature circuit breaker. Brand: Square D. Amperage: 15 Amps, as indicated by the "15" on the switch. Interrupting Rating: 10 kA (kilo-Amps), as visible on the breaker. Voltage Rating: 120/240V AC, suitable for residential panels