The Square D QO115DF is a 1 Pole molded case dual function circuit breaker with a current rating of 15 Amps and a voltage rating of 120VAC. It has an interrupting rating of 10kAIC at 120VAC. The QO115DF has a plug-in connection type and includes long time and instantaneous trip functions.
I bought these by mistake and had to replace with the wider models. 15 Amp I used for light circuits.