3-Pin SPDT PCB Slide Switch — Reliable 2-Position Control for Compact Electronics
When you are building a custom control panel, prototyping an Arduino project, or assembling a batch of DIY electronics kits, a loose or oversized switch can ruin an otherwise clean layout. These 3-pin SPDT PCB slide switches are designed for makers, electronics hobbyists, and small-batch assemblers who need a dependable, space-saving toggle that drops straight into a standard PCB footprint without rework.
Each switch is a 3-pin, single pole double throw (SPDT) slide-mount design with a 2-position actuator. The handle height is available in three options: G2 (2mm), G3 (3mm), and G4 (4mm), to match different enclosure depths and panel clearances. Packs are available in 20, 40, 100, or 200 pieces to suit everything from one-off prototypes to workshop stock. Pin pitch is typically 2.54mm (0.1"), compatible with standard breadboards and through-hole PCB layouts.
These mini slide switches are well suited for signal-level circuit interrupts in Arduino and Raspberry Pi builds, on/off power routing in battery-powered DIY devices, and mode-selection toggles in custom electronics enclosures — anywhere a compact, low-profile 2-position SPDT switch is needed on a PCB.
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Compatible with: Standard 2.54mm (0.1") through-hole PCB layouts · Breadboards · Arduino, Raspberry Pi, and custom DIY electronics projects · Most mini slide switch footprints
✅ Key Features of These 3-Pin SPDT PCB Slide Switches
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🎚️2-Position SPDT Switching — Single pole double throw design lets you route one input signal to either of two outputs, or use it as a clean on/off circuit interrupt in low-power DIY electronics.
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📐Three Handle Heights Available — Choose G2 (2mm), G3 (3mm), or G4 (4mm) to match your enclosure depth or panel cutout — no filing, no shimming, no guesswork.
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🔩Standard 2.54mm Pin Pitch — Through-hole pins align with 0.1" grid breadboards and common PCB footprints, making these mini slide switches drop-in compatible with most prototyping layouts.
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🧱PCB Slide-Mount Body — The flat-bottom slide-mount housing sits flush against the board surface, keeping the switch stable during soldering and reducing mechanical stress on the pads.
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📦Flexible Pack Quantities — Available in 20, 40, 100, or 200 pieces so you can stock exactly what your project or workshop needs without over-ordering or running short mid-build.
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⚡Signal-Level Circuit Control — Designed for low-voltage, low-current signal switching in microcontroller projects, sensor toggles, and mode-select circuits where a compact 2-position toggle switch is the right tool.
📐 Technical Specifications — Mini PCB Slide Switch
| Switch Type |
SPDT (Single Pole Double Throw) |
| Number of Positions |
2 |
| Number of Pins |
3 (through-hole) |
| Pin Pitch |
Typically 2.54mm (0.1") |
| Handle Height Options |
G2 — 2mm (approx. 5/64") / G3 — 3mm (approx. 1/8") / G4 — 4mm (approx. 5/32") |
| Mounting Style |
PCB slide mount (through-hole) |
| Rated Voltage |
Typically 6V DC – 12V DC (signal level); contact us to confirm |
| Rated Current |
Typically 0.3A – 0.5A; contact us to confirm for your application |
| Actuator Style |
Slide / mini toggle |
| Body Material |
See variant options |
| Contact Material |
See variant options |
| Operating Temperature |
See variant options |
| Pack Sizes Available |
20 pcs / 40 pcs / 100 pcs / 200 pcs |
| Compliance / Standards |
Contact us to confirm |
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Spec confirmation recommended: Rated current, voltage, and material details vary by production batch. If your application is safety-critical or requires specific tolerances, please contact us before ordering.
❓ Frequently Asked Questions
How do I choose the right handle height — G2, G3, or G4?
Handle height determines how far the actuator extends above the PCB surface. G2 (2mm ≈ 5/64") is typically used in low-profile enclosures where clearance is tight. G3 (3mm ≈ 1/8") is the most common general-purpose choice. G4 (4mm ≈ 5/32") works well when the switch needs to protrude through a panel cutout. Measure the distance from your PCB surface to the panel or enclosure lid before selecting.
What does SPDT mean and how do I wire a 3-pin slide switch?
SPDT stands for Single Pole Double Throw. The switch has one common (COM) pin and two output pins. In one position, COM connects to output A; in the other, COM connects to output B. For a simple on/off interrupt, connect your signal to COM and leave one output open — the switch will connect or disconnect the circuit as you slide it.
What current and voltage can these switches handle?
Mini PCB slide switches in this form factor generally support ratings in the range of 0.3A–0.5A at 6V DC to 12V DC. These are signal-level switches intended for low-power circuit control — not for switching mains voltage or high-current loads. Contact us to confirm the exact rating before use in safety-critical applications.
Can I use these switches outdoors or in humid environments?
These are standard PCB-mount slide switches without an IP-rated enclosure. They are generally intended for indoor electronics projects and protected enclosures. For outdoor or high-humidity use, house them inside a sealed enclosure or select a switch with an IP67 or higher rating.
What PCB footprint and pin pitch do these switches use?
These are 3-pin through-hole PCB slide switches with a pin pitch typically of 2.54mm (0.1"), compatible with most prototyping breadboards and standard PCB layouts. Confirm the exact footprint dimensions against your PCB design before ordering in bulk.
Can I use these as an interrupt switch to break a circuit?
Yes. In a 2-position SPDT configuration, you can wire the switch so that one position completes the circuit and the other breaks it — effectively using it as an on/off interrupt switch. This is a common use case in DIY electronics, Arduino projects, and custom control panels.
Which pack size should I order?
For prototyping or a single project, the 20-piece pack is a practical starting point. The 40-piece pack suits small production runs or classroom kits. The 100-piece and 200-piece packs offer better per-unit value for workshop stock, maker spaces, or recurring builds.
🛒 Select your handle height and pack size above, then add to cart — ships from our US warehouse.
