Switch configuration · DPDT
Double Pole Double Throw Switch (DPDT)
A DPDT switch changes two independent common circuits between two output paths with one actuator. Use this page to compare real toggle and rocker examples and prepare a clear dual-circuit sourcing request.
- 2 independent poles
- 2 paths per pole
- 1 shared actuator
Circuit function
What is a DPDT switch?
“Double pole” means two independent common circuits are controlled. “Double throw” means each pole can connect to one of two outputs. Both poles move together under one actuator.
DPDT contact logic is used when two paths must change state at the same time. Reversing and polarity-changing circuits are common examples, but the complete system must provide appropriate protection and interlocking.
For a deeper explanation, read what a DPDT switch is and how it works.
Real product examples
DPDT switch product formats
These are real switch images from the WEUP WordPress media library. They show physical formats only; the exact model drawing remains the authority for ratings, terminals and action.
Configuration comparison
DPDT vs. other switch configurations
Use pole and throw requirements to separate circuit functions before choosing a rocker, toggle or other actuator style.
| Configuration | Poles | Throws per pole | Control logic | Use when |
|---|---|---|---|---|
| SPST | 1 | 1 | One circuit ON/OFF | One path must be opened or closed |
| SPDT | 1 | 2 | One common selects between two paths | Changeover or source/load selection is needed |
| DPST | 2 | 1 | Two circuits ON/OFF together | Two isolated paths follow one actuator |
| DPDT | 2 | 2 | Two circuits change between two paths | Dual-circuit changeover or reversing logic is needed |
Related pages: DPST switch page, SPDT switch page, toggle switch wiring guide.
Buyer checklist
How to specify the right DPDT switch
A useful RFQ starts with the circuit and installation. These checks help prevent a visual match from becoming an electrical or mechanical mismatch.
Switching action
Specify ON-ON, ON-OFF-ON, momentary or another verified action.
Two-pole circuit map
Provide the two common paths and both output pairs in a clear drawing.
Electrical load
State voltage, current and load type for each pole, including inrush where relevant.
Terminal arrangement
Share the required terminal style, numbering and physical orientation.
Mounting fit
Provide panel cutout, available depth, retention and operator-clearance needs.
Environment and protection
Describe the operating environment and the wider system protection scheme.
Application fit
Where DPDT switches are considered
Application fit depends on the complete circuit, load, mounting and operating environment—not the configuration name alone.
Dual-circuit changeover
Two isolated common paths change between two outputs together.
Direction-control logic
Used within suitable, protected circuits that require coordinated reversing logic.
Polarity-routing circuits
Two conductors can be rerouted together when the full design is appropriate.
Control panels
One operator action can change two documented control paths.
Equipment mode selection
Dual-channel selection between two defined operating states.
Custom operator interfaces
Rocker or toggle format, markings and illumination can be discussed after the circuit is fixed.
Faster sourcing
What to send with your inquiry
A drawing or current sample is the fastest reference. Otherwise, send the project facts in this checklist.
- Required switching action
- Voltage, current and load type
- Terminal style or circuit drawing
- Panel cutout and installation depth
- Illumination and marking needs
- Operating environment
- Target quantity and schedule
- Photos or sample reference
FAQ
Double Pole Double Throw Switch questions
What does DPDT mean on a switch?
DPDT means double pole, double throw. Two independent common circuits each switch between two outputs under one actuator.
What is the difference between DPST and DPDT?
DPST provides ON/OFF control for two circuits. DPDT changes two circuits between two output paths.
Does every DPDT switch have six terminals?
A basic DPDT contact set commonly uses six switching terminals, but illumination and other functions can add terminals.
Can a DPDT switch reverse a motor?
DPDT contact logic can be used in reversing circuits, but the selected switch, load, protection and interlocking must be suitable for the complete system.
What information is needed for a DPDT quote?
Send the action, two-pole circuit map, electrical load, terminal style, mounting dimensions, environment, quantity and available drawings.
Need a DPDT switch matched to your project?
Share the circuit, load, terminal and panel requirements. The WEUP team can use those details to discuss a suitable product route.