Contact rating (Switching rating):

The capacity to switch (connect or interrupt) an electrical load. Load characteristic (resistive, inductive, capacitive, power factor). Contrast with non-switching rating.

Direct Current (DC):

Type of electrical current having constant polarity, generally associated with electricity from a battery.

DIP:

Dual-in-line package refers to a component with two rows of PC terminals. The terminals most commonly have pitch of 0.100 and located at 0.30 across the package.