Learn everything about Slide Switch Guide including types, wiring diagrams, SPDT vs DPDT differences, PCB design, and applications. A complete guide for engineers and OEM product designers.
You are laying out the control panel for a new industrial instrument. The design calls for a switch that lets the user select between two operating modes—and it needs to be compact, reliable, and easy to integrate into a PCB. The engineering team is debating: should it be a toggle switch, a rocker switch, or a slide switch?
For many designers, the slide switch is the answer. It is one of the most versatile and widely used electromechanical components in electronic design, offering a simple, intuitive user interface in a compact package. Yet despite its ubiquity, the slide switch is often underspecified—engineers choose the wrong pole and throw configuration, overlook critical electrical ratings, or fail to consider PCB mounting constraints until it is too late.
This guide covers everything you need to know about slide switches: what they are, how they work, the different types and configurations, wiring diagrams, PCB design considerations, applications, and how to choose the right switch for your project.
Internal link: For a deeper look at switch configurations, see our guide on SPDT vs DPDT Slide Switch .
What Is a Slide Switch?
A slide switch is an electromechanical component that controls a circuit by moving a linear sliding mechanism. The switch is operated by sliding a lever or actuator back and forth to make or break an electrical connection.
The slide switch opens or breaks a circuit by moving a conductive element, switching between an open (non-conductive) and closed (conductive) state. As a contact-held switch, it maintains one position until an intentional actuation force is applied to switch it to the other state, making it a reliable, robust solution for various low-power and space-constrained applications.
Slide switches have two, three, four or six poles, and the number of throws usually has two or three positions. Because of the relatively small number of poles and throws, they are more suitable for use in simple circuits.
Key characteristics:
- Operated by sliding a lever or actuator
- Maintains position until intentionally moved (latching)
- Available in multiple pole/throw configurations
- Compact and low-profile
- Suitable for PCB mounting (SMT, DIP, right-angle, vertical)
Internal link: Explore our full range of Slide Switches —available in SPST, SPDT, DPST, and DPDT configurations with SMT and DIP mounting.
How Does a Slide Switch Work?
Slide switches operate on a simple mechanical principle: a movable contact is connected to the switch’s actuator or slider, and this movable contact slides between two or more stationary contacts depending on the switch’s configuration.
The basic operation:
- In the open position, the movable contact is not in contact with any of the stationary contacts, breaking the electrical circuit.
- In the closed position, the movable contact is in contact with one or more stationary contacts, completing the electrical circuit.
- Switching action: The user manually slides the actuator or lever back and forth, which moves the movable contact. When the actuator is moved, the movable contact transitions between the open and closed positions, either making or breaking the electrical connection.
Internal mechanism: The jumping mechanism can be divided into double-ball pressure spring type, heart type, and single-ball pressure spring type. When actuated, the force of the compression spring causes the steel ball to quickly enter other positioning grooves, realizing the switching of the switch.
Switch configurations: Slide switches can have various configurations, such as single-pole, single-throw (SPST), single-pole, double-throw (SPDT), or multi-position configurations. The number of stationary contacts and the position of the movable contact determine the switch’s functionality and the number of circuits it can control.
External link: For a basic introduction to switch operation, see SparkFun’s Button and Switch Basics tutorial.
Slide Switch Types
Slide switches are classified by two primary characteristics: pole count (how many circuits are controlled) and throw count (how many positions each circuit can switch between).
Pole and Throw Terminology
| Term | Meaning |
|---|---|
| Pole | The number of separate circuits the switch can control simultaneously |
| Throw | The number of output positions each pole can connect to |
| SP | Single Pole — controls one circuit |
| DP | Double Pole — controls two circuits simultaneously |
| ST | Single Throw — ON-OFF (one output) |
| DT | Double Throw — switches between two outputs |
Common Slide Switch Configurations
| Switch Type | Pins | Function | Typical Use |
|---|---|---|---|
| SPST | 2 | ON-OFF | Simple power control |
| SPDT | 3 | Switches one circuit between two outputs | Signal selection, power source switching |
| DPST | 4 | Two independent ON-OFF circuits | Dual circuit power control |
| DPDT | 6 | Two independent circuits, each switching between two outputs | Stereo audio, motor direction control |
| SP3T | 4 | One circuit switching between three outputs | Multi-mode selection |
| DP3T | 8 | Two circuits, each switching between three outputs | Complex industrial controls |
Internal link: For a detailed comparison of SPDT and DPDT, see our SPDT vs DPDT Slide Switch Guide .
Slide Switch Configurations from Vistar Electronics
Vistar Electronics supplies a complete range of slide switches—SPST, SPDT, DPST and DPDT circuits in 2-position or 3-position configurations. Circuit configurations available include SPST, SPDT, SP3T, DPST, DPDT and DP3T circuits—from simple single-pole on/off switching to complex double-pole three-position control.
2-Position (ON-ON): Simple binary switching for mode selection between two states.
3-Position (ON-OFF-ON): Adds a centre-off position for forward-off-reverse motor control, three-state logic selection, or multi-function mode switching—widely used in industrial controls and audio equipment.
Internal link: Browse our Slide Switch Product Line for complete specifications and mounting options.
SPDT vs DPDT Slide Switch Comparison
The two most common slide switch configurations are SPDT and DPDT.
| Feature | SPDT | DPDT |
|---|---|---|
| Terminals | 3 pins | 6 pins |
| Poles | 1 pole | 2 poles |
| Circuits Controlled | 1 circuit | 2 independent circuits |
| Function | Redirects one circuit between two outputs | Redirects two circuits between two outputs each |
| Equivalent To | Single change-over switch | Two SPDT switches in tandem |
| Complexity | Simple | More advanced |
| Common Configurations | ON-ON, ON-OFF-ON | ON-ON, ON-OFF-ON |
SPDT switches are the most common slide switch variety. They have three terminals: one common pin and two pins which compete for connection to the common. They are best used for selecting between two power sources and swapping inputs.
DPDT switches work like two SPDT switches operating side by side. They are used when two circuits need to be switched simultaneously—such as left and right audio channels in stereo equipment, or forward and reverse windings in motor control.
Internal link: For an in-depth comparison, see our SPDT vs DPDT Slide Switch guide.
Slide Switch Wiring Explained
Understanding how to wire slide switches is essential for PCB design and circuit integration.
SPDT Wiring
An SPDT switch has three terminals:
- Common (COM): The input terminal
- Normally Open (NO): Output 1
- Normally Closed (NC): Output 2
┌─── NO ─── Output 1
│
Input ────┼─── Common (COM)
│
└─── NC ─── Output 2- In one switch position, Common connects to NO
- In the other position, Common connects to NC
Example use: Selecting between two power sources. Connect the load to Common, and connect the two power sources to NO and NC.
DPDT Wiring
A DPDT switch has six terminals, arranged as two independent SPDT sections:
Circuit 1: ┌─── NO1 ─── Output 1A
│
Input 1 ────┼─── COM1
│
└─── NC1 ─── Output 1B
Circuit 2: ┌─── NO2 ─── Output 2A
│
Input 2 ────┼─── COM2
│
└─── NC2 ─── Output 2B- The actuator moves both sections simultaneously
- In position 1: COM1 connects to NO1, COM2 connects to NO2
- In position 2: COM1 connects to NC1, COM2 connects to NC2
Example use: Stereo audio switching. Connect left audio to Circuit 1 and right audio to Circuit 2. One switch routes both channels simultaneously.
External link: For detailed switch wiring diagrams, see SparkFun’s Button and Switch Basics tutorial.
3-Position (ON-OFF-ON) Wiring
In a 3-position switch, the center position is OFF (no connection). This is commonly used for:
- Motor control: Forward-Off-Reverse
- Logic selection: High-Off-Low
- Mode selection: Mode 1-Off-Mode 2
Internal link: For more on 3-position slide switch applications, see our Slide Switch Product Guide .
PCB Design Considerations
When designing a PCB with slide switches, several factors must be considered.
Mounting Styles
Slide switches are available in multiple PCB mounting configurations:
| Mounting Type | Best For |
|---|---|
| SMT | High-volume automated assembly, double-sided PCBs |
| DIP Through-Hole | Maximum mechanical retention, high-vibration environments |
| Right-Angle (90°) | Edge-mount designs, side-actuated applications |
| Vertical | Top-panel operation, minimizing PCB footprint |
| Panel Mount | Chassis-mounted applications |
Footprint and Routing
- SPDT: 3 pads, simple routing, minimal PCB space
- DPDT: 6 pads, more complex routing, requires more PCB space
- SP3T/DP3T: Additional pads for multi-position switching
Key PCB Specifications
| Parameter | Signal-Grade Series | Power-Grade Series |
|---|---|---|
| Circuit Configurations | SPST / SPDT / SP3T | DPST / DPDT / DP3T |
| Positions | 2-position / 3-position | 2-position / 3-position |
| Current Rating | 0.5A | 3A – 5A |
| Voltage Rating | 12V DC – 30V DC | 125V AC – 250V AC / 30V DC |
| Contact Resistance | ≤ 50mΩ (initial) | ≤ 50mΩ (initial) |
| Insulation Resistance | ≥ 100MΩ at 100V DC | ≥ 100MΩ at 100V DC |
| Mechanical Life | 10,000 cycles (min) | 10,000 cycles (min) |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C |
Termination Styles
Slide switches are available with various termination styles:
- Gull wings: For SMT mounting
- PC pins: For through-hole mounting
- Wire leads: For panel mount applications
- Screw terminals: For high-current applications
Material Considerations
- Contact material: Gold-plated phosphor bronze for low-current signal applications; silver-plated brass/copper alloy for power applications
- Housing material: High-temperature LCP/PBT/PA9T, UL94-V0 rated for flame resistance
- Actuator material: Thermoplastic with high strength and heat resistance
Internal link: For help selecting the right mounting style, see our Slide Switch Selection Guide .
Slide Switch Applications
Slide switches find applications across domestic, office, and industrial environments, serving in a wide range of electronic and electromechanical systems. They are particularly favored for their durability and ease of use.
Consumer Electronics
- ON/OFF control for flashlights, toys, and remotes
- Audio equipment and portable devices
- Computer peripherals
- Electronic toys
Industrial Controls
- Control panels and lighting systems
- Industrial automation and instrumentation
- Communication hardware
- Test and measurement equipment
Power Systems
- Low-power control in control panels
- Power supplies and lighting controls
- Mode selectors in multi-speed fans
Automotive Applications
- Vehicle controls and instrumentation
- Handheld devices
Internal link: For more application-specific guidance, see our How Do Slide Switches Work article.
How to Choose a Slide Switch
Step 1: Determine the Circuit Configuration
| Requirement | Recommended Configuration |
|---|---|
| Simple ON/OFF power control | SPST |
| Select between two circuits | SPDT |
| Control two circuits simultaneously | DPDT |
| Select between three circuits | SP3T |
| Control two circuits with three positions | DP3T |
Step 2: Define Electrical Requirements
- Current rating: How much current will the switch carry? Signal-grade (0.5A) or power-grade (3A–5A)
- Voltage rating: AC or DC? Maximum voltage? Up to 125V AC / 30V DC for power-grade
- Contact resistance: ≤ 50mΩ for reliable signal transmission
Step 3: Select PCB Mounting Style
- SMT: For high-volume automated assembly
- DIP Through-Hole: For maximum mechanical retention
- Right-Angle: For edge-mount designs
- Vertical: For top-panel operation with minimal footprint
Step 4: Consider Mechanical Specifications
- Actuator travel: 2.0mm – 4.0mm depending on series
- Actuator height: Flush (0mm), Standard (2–5mm), or Extended (6mm+)
- Operating force: The force required to actuate the switch
- Mechanical life: Minimum 10,000 cycles for standard switches
Step 5: Verify Environmental Requirements
- Operating temperature: -40°C to +85°C for most applications
- Flammability: UL94-V0 rated housing
- Compliance: RoHS 3, REACH, ISO 9001:2015
Internal link: Browse our Slide Switch Selection Guide for complete specifications and options.
Mini Slide Switch vs Standard Slide Switch
For space-constrained applications, mini slide switches offer a compact alternative to standard sizes.
| Feature | Mini Slide Switch | Standard Slide Switch |
|---|---|---|
| Size | Ultra-compact | Standard |
| PCB Footprint | Minimal | Standard |
| Current Rating | Typically lower (0.3A) | Up to 5A |
| Applications | Wearables, compact devices | General electronics |
| Mounting | SMT, through-hole | SMT, through-hole, panel |
Example: The SS-13D01 is a precision-engineered 1P3T slide knob switch designed as a compact 3-pin PCB slide switch for space-constrained electronic assemblies. Rated for 0.3A at DC 50V with a 1P2T electrical function, it delivers reliable circuit control for industrial equipment, audio devices, and consumer electronics.
Internal link: Explore our Mini Slide Switch Options for compact PCB designs.
Frequently Asked Questions
What is a slide switch used for?
A slide switch is used for controlling circuit current flow by sliding a lever or actuator back and forth. It is commonly used in consumer electronics, power systems, industrial controls, and automotive applications.
What is the difference between SPDT and DPDT slide switches?
SPDT (Single Pole Double Throw) has 3 terminals and controls one circuit, switching it between two outputs. DPDT (Double Pole Double Throw) has 6 terminals and controls two independent circuits simultaneously.
How does a slide switch work?
A slide switch operates by moving a movable contact between stationary contacts using a sliding actuator. In the open position, the circuit is broken; in the closed position, the circuit is completed.
What are the types of slide switches?
Common types include SPST, SPDT, DPST, DPDT, SP3T, and DP3T. They are available in 2-position (ON-ON) and 3-position (ON-OFF-ON) configurations.
Can slide switches be used on PCB?
Yes. Slide switches are available in SMT, DIP through-hole, right-angle, and vertical mounting styles for PCB integration.
What is the difference between ON-ON and ON-OFF-ON switches?
ON-ON switches have two positions and switch between two circuits. ON-OFF-ON switches have three positions with a centre-off position, used for three-state control such as forward-off-reverse.
What is the typical current rating for slide switches?
Slide switches are available with current ratings ranging from 1 mA to 25 A. Vistar Electronics offers signal-grade (0.5A) and power-grade (3A–5A) options.
What is the mechanical life of a slide switch?
Standard slide switches are rated for 10,000 mechanical cycles minimum. High-durability variants can achieve up to 100,000 cycles.
Slide Switches from Vistar Electronics
At Vistar Electronics, we understand the nuances of slide switch selection. Our slide switch portfolio includes:
- Complete circuit configurations: SPST, SPDT, SP3T, DPST, DPDT, DP3T
- 2-position (ON-ON) and 3-position (ON-OFF-ON) options
- Multiple mounting styles: SMT, DIP through-hole, right-angle, vertical, and panel mount
- Current ratings: 0.5A to 5A
- Voltage ratings: Up to 125V AC / 30V DC
- Mechanical life: 10,000 cycles minimum
- Contact materials: Gold-plated phosphor bronze for signal, silver-plated brass/copper alloy for power
- Housing: UL94-V0 high-temperature LCP/PBT/PA9T
- Operating temperature: -40°C to +85°C
- Compliance: RoHS 3, REACH, ISO 9001:2015
- Free samples available for qualified projects
Whether you are designing a consumer device, an industrial control panel, or a communication system, the right slide switch starts with understanding the configuration, mounting style, and electrical requirements. We can help you specify it, source it, and integrate it.
Internal link: Browse our full range of Slide Switches .
For technical specifications, samples, or application support, contact the Vistar Electronics engineering team.
