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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Vishay Intertechnology released its DG469 and DG470 high-voltage, single-and dual-supply single-pole double-throw (SPDT) analog switches.
TABLE 1 TYPICAL RF CHARACTERISTICS Advanced DC Relay 509 Series Switch Insertion Loss (dB) (max) DC to 1 GHz 0.20 0.15 1 to 2 GHz 0.40 0.20 2 to 3 GHz 0.50 0.25 SWR Dc to 1 GHz 1.12 1.10 1 to 2 GHz 1.30 1.15 2 to 3 GHz 1.40 1.20 Isolation (dB) (min) DC to 1 GHz 25 65 1 to 2 GHz 20 60 2 to 3 GHz 20 60 A new 509 series single-pole double-throw (SPDT) electromechanical switch has been introduced that provides the long-awaited solution for miniaturizing space equipment.
The ISM-TRM-RELAY has 16 independent, single-pole double-throw (SPDT) form C relays.
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).
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.
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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