SWITCHES, DISPLAYS AND UIs


Slide switches explained: Types, specifications and applications


By Ryan Smoot, technical support engineer, Same Sky T


here are multiple techniques for regulating the flow of electrical current within a circuit, and slide switches are among the most widely implemented solutions. These switches offer a compact and dependable means of circuit control, enabling connection or disconnection through a simple linear sliding action. This brief technical overview will examine the operational principles of slide switches, explore their primary configurations and outline key electrical and mechanical


considerations for optimal selection. Slide switch basics A slide switch is an electromechanical component designed for the control of electrical circuits through a linear sliding mechanism. It functions by shifting conductive elements to establish or interrupt a circuit, transitioning between open (non- conductive) and closed (conductive) states. As a maintained-contact switch, it retains its last position until a deliberate actuation force is applied to toggle it to an alternate state, making it a reliable and stable solution for various low-power and space- constrained applications.


Slide switches commonly feature a single pole, double throw (SPDT) configuration, enabling the redirection of electrical current between two distinct circuits—often referred to as on-on operation. This design allows seamless switching between power sources or circuit paths by shifting the actuator. Another widely used configuration is the single pole, single throw (SPST) slide switch, which provides straightforward on-off control by either completing or interrupting the circuit. In applications requiring more complex switching functionality, a double pole, double throw (DPDT) configuration may be employed, facilitating on-off-on operation by controlling two independent circuits simultaneously.


(the electrical resistance between isolated conductive parts) are listed to ensure proper circuit isolation.


Beyond electrical ratings, mechanical specifications, such as actuation travel distance (the displacement required to toggle the switch) and operating force (the force necessary for actuation) are also outlined. Understanding these values is essential for selecting a switch that aligns with both electrical and mechanical design requirements.


Figure 1: Basic slide switch. (Image source: Same Sky)


For specialised use cases, slide switches can incorporate multiple throws to achieve multi-on-on operation. However, this can introduce practical challenges, such as increased difficulty in precisely positioning the actuator to the desired setting. Same Sky offers slide switches with a variety of circuit types, including SPDT, SP3T, SP4T, DPDT, DP3T and DP4T. For a deeper exploration of switch functionalities, refer to Same Sky’s Fundamentals of Switches blog.


Important slide switch specifications


The electrical specifications provided in a slide switch datasheet define critical performance parameters, including rated voltage and current, which indicate the maximum electrical load the switch can reliably handle. Additionally, key properties, such as withstand voltage (the maximum voltage the switch can endure without breaking down) and insulation resistance


12 OCTOBER 2025 | ELECTRONICS FOR ENGINEERS


Slide switches are commonly available in surface mount, through-hole, or panel- mount configurations. The appropriate mounting style depends on manufacturing processes, available space and mechanical stresses within the application, particularly regarding switch retention on the PCB or chassis. Below are additional specifications to consider:


Termination style: Provides flexibility for the different mounting options and can include gull wing, PC pin, wire leads, screw terminal and more Voltage rating: Defines the maximum allowable voltage across the switch without risk of failure. For slide switches this could range anywhere from 5 V up to 125 V Current rating: Specifies the maximum current the switch can handle without degradation. For slide switches this could range anywhere from 1 mA up to 25 A Actuator height: Raised actuators provide easier access, while flat actuators allow for a flush, low-profile design in equipment enclosures Pitch: The centre-to-centre distance between switch terminals, crucial for PCB layout and compatibility. Common pitches usually range from 2 mm up to 6.9 mm IP Rating: Indicates the level of protection against dust and moisture ingress, important for harsh environments or


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