single-pole double-throw


Also found in: Acronyms.

single-pole double-throw

[′siŋ·gəl ′pōl ′dəb·əl ′thrō]
(electricity)
A three-terminal switch or relay contact arrangement that connects one terminal to either of two other terminals. Abbreviated SPDT.
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References in periodicals archive ?
If only two signals are involved, the switch can be described in the usual shorthand nomenclature as a single-pole double-throw (SPDT) capable of connecting the DVM--the single pole--to either of the two signals.
Like their larger siblings, reed relays offer three general-purpose contact configurations: normally open single-pole single-throw (NO SPST); normally closed single-pole single-throw (NC SPST) and single-pole double-throw (SPDT).
The HB Series can be specified in single-pole double-throw, momentary or maintained circuits.
These system-solution switches are Quad Single-Pole Double-Throw (SPDT) video switches.
The device is a cost-effective device compared to alternative devices and can be used in instant power-up circuits for USB ports, double data rate (DDR) DRAM memory applications, or other circuits requiring a single-pole double-throw (SPDT) device to switch between a standby voltage and a core voltage rail.

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