Enables the transmembrane transfer of a calcium ion by a voltage-gated channel across the plasma membrane of an SA node cardiac muscle cell that contributes to the depolarization phase of an action potential. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded.
Taxonomy/Path:
GO : voltage-gated calcium channel activity involved in cardiac muscle cell action potential / voltage-gated calcium channel activity involved SA node cell action potential