Surface Mounting (SMT):

A method of soldering packages directly onto the surface of printed-circuit boards without insertion of the leads through hole in the board.


Voltage, alternating current (see AC)

Switch Abbreviations:

SPST: Single-pole single-throw; SPDT: Single-pole double-throw; DPST: Double-pole single-throw; DPDT: Double-pole double-throw. (See also Forms). Please refer to the ITW Switches Characteristics/Circuits for more detail


Voltage, direct current (see DC)