Switch - SPDT

Official

Passives

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Curated by CircuitSim

Switch - SPDT schematic symbol
Details

Manufacturer

Generic


Part number


Pins

3


Used in

No circuits


Added

Jul 2026

About this component

A three-terminal single-pole double-throw switch whose state connects the common terminal to one of two throws.

Parameters

Basic settings
5 parameters
ParameterNameDescriptionDefault

RON

On resistance

Resistance of the switch when closed.

100u

ROFF

Off resistance

Resistance of the switch when open.

100G

STATE

State

Switch state: 0 connects COM to NC; 1 connects COM to NO.

0

RESISTANCENC

NC contact resistance

Computed COM-to-NC contact resistance from on resistance, off resistance, and switch state.

RESISTANCENO

NO contact resistance

Computed COM-to-NO contact resistance from on resistance, off resistance, and switch state.

Pins

Pins
3 pins
NumberNameDescription

1

NC

Normally-closed throw. Connected to COM when State is 0.

2

COM

Common movable switch contact.

3

NO

Normally-open throw. Connected to COM when State is 1.

Public circuits using this component

No public circuits are using this component yet.

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