0.3 A C-Curve — the fine overcurrent branch
That 0.3 A rating is the continuous current at 30 °C and 40 °C; at 60 °C it derates to 0.25 A, so if this breaker sits in a warm panel near other heat sources, the actual load limit drops by 17 %.
DC capability and pollution class
This breaker is rated for DC circuits up to 60 V maximum.
