Abbreviation | Description | Symbol | IEC |
---|---|---|---|
SPST | Single pole, single throw | ![]() | ![]() |
SPDT | Single pole, double throw | ![]() | ![]() |
SPCO | Single pole changeover or Single pole, centre off | ||
SPTT | Single Pole, Triple Throw | ||
DPST | Double pole, single throw | ![]() | ![]() |
DPDT | Double pole, double throw | ![]() | ![]() |
DPCO | Double pole changeover or Double pole, centre off | ||
Intermediate switch | DPDT switch internally wired for polarity-reversal applications | ![]() |