SPDT Toggle Switch — MTS Series 3/6/9/12 Pin, 2/3 Position, Reliable Circuit Control
Whether you're wiring a custom control panel, retrofitting a vintage amplifier, or building a DIY electronics project, finding a toggle switch that fits your exact circuit configuration shouldn't be a guessing game. Hobbyists, electricians, and makers who need a dependable SPDT toggle switch for multi-circuit routing often struggle with mismatched pin counts, flimsy actuators, or switches that lack a center-off option — this MTS series lineup solves all of that in one place.
Each switch in this listing is an MTS series panel-mount toggle switch with a threaded bushing for standard 6mm (≈1/4") panel cutouts. Models range from 3-pin single-pole (SPDT) up to 12-pin four-pole (4PDT), in both 2-position (ON-ON) and 3-position (ON-OFF-ON) configurations, plus momentary (spring-return) variants. Actuators are available in blue or red. An optional 6mm waterproof cap is available for blue-actuator models. All switches are rated AC 2A/250V and AC 5A/120V.
Typical use cases include DIY guitar effects pedal wiring (where DPDT and 3PDT switches are standard), custom automotive relay bypass panels, ham radio and amateur electronics control boxes, and industrial control enclosures requiring a compact panel-mount toggle switch with multiple pole configurations.
🔌 Compatibility Note: The 6mm waterproof cap accessory is compatible with blue actuator variants only (MTS-102, MTS-103, MTS-202, MTS-203 Blue). Confirm your panel hole diameter is 6mm (≈1/4") before ordering. For DC circuits, derate the current rating — contact us to confirm suitability for your load.
✅ Key Features of These SPDT Toggle Switches
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⚡Dual Voltage Rating — Rated AC 2A at 250V and AC 5A at 120V, covering both North American and international low-voltage control circuit applications.
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🔀Full Configuration Range — Choose from 3-pin (SPDT), 6-pin (DPDT), 9-pin (3PDT), or 12-pin (4PDT) in 2-position ON-ON, 3-position ON-OFF-ON, or momentary spring-return — one listing covers the most common toggle switch configurations.
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🎨Color-Coded Actuators — Blue and red lever options make it easy to visually differentiate circuits on a busy control panel without any additional labeling.
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💧Optional Waterproof Cap — The 6mm silicone waterproof cap (sold as a separate variant) fits over the blue actuator to provide basic moisture protection, useful for light-duty outdoor or splash-prone enclosures.
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🔩Standard Panel-Mount Bushing — Threaded bushing fits a 6mm panel hole with a hex nut for secure mounting; compatible with standard metal and plastic enclosures used in DIY electronics and control panel builds.
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📦Flexible Pack Quantities — Available in quantities from 1 to 40 pieces per order, so you can grab a single switch for a repair or stock up for a production run without paying retail per-unit pricing.
📐 Technical Specifications — MTS Series Panel-Mount Toggle Switch
| Switch Series |
MTS (MTS-102, MTS-103, MTS-202, MTS-203, MTS-302, MTS-303, MTS-402, MTS-403, MTS-123, MTS-223) |
| Switch Type |
Panel-mount toggle switch (SPDT / DPDT / 3PDT / 4PDT) |
| Pole / Throw Configuration |
SPDT (3-pin), DPDT (6-pin), 3PDT (9-pin), 4PDT (12-pin) |
| Number of Positions |
2-position (ON-ON) or 3-position (ON-OFF-ON); Momentary (spring-return) available |
| Voltage Rating (AC) |
250V AC / 120V AC |
| Current Rating (AC) |
2A at 250V AC; 5A at 120V AC |
| DC Rating |
Contact us to confirm — derate from AC rating for DC loads |
| Panel Mounting Hole |
Typically 6mm (≈1/4") diameter |
| Terminal Type |
Solder lug |
| Actuator Color |
Blue or Red (see variant options) |
| Waterproof Cap |
Optional 6mm silicone cap (blue actuator variants only) |
| Pack Quantity |
1, 2, 3, 4, 5, 6, 8, 10, 16, 20, or 40 pcs (see variant options) |
| Operating Temperature |
See variant options / Contact us to confirm |
| Certifications |
See variant options |
⚠️ Spec Confirmation: DC ratings, operating temperature range, and certifications vary by model. If your application requires confirmed specs for a specific model number, please contact us before ordering.
❓ Frequently Asked Questions
How do I choose the right pin count and position for my project?
Pin count determines how many circuits the switch controls: 3-pin (SPDT) switches one circuit, 6-pin (DPDT) switches two independent circuits simultaneously, 9-pin (3PDT) switches three, and 12-pin (4PDT) switches four. Position refers to how many stable states the switch has — 2-position is ON-ON (always connected to one side), while 3-position adds a center-OFF state. Momentary variants return to center when released. Choose based on how many circuits you need to route and whether you need a center-off or spring-return function.
What is the current and voltage rating of these toggle switches?
These MTS series switches are rated AC 2A at 250V and AC 5A at 120V. For DC applications, derate accordingly — generally DC ratings are lower than AC ratings for the same switch. Always verify your circuit's actual load before installation.
Can these switches be used outdoors or in wet environments?
The standard switches are not rated for outdoor or wet environments on their own. However, the optional 6mm waterproof cap (available as a separate variant, compatible with blue actuator switches only) provides a basic moisture barrier for the actuator. For fully weatherproof installations, additional panel sealing is generally recommended.
What panel hole size do these switches require?
MTS series toggle switches typically require a 6mm (approximately 1/4") panel mounting hole. Always verify with your specific panel thickness and confirm the bushing thread length is sufficient for your enclosure wall.
What is the difference between the Blue and Red actuator versions?
Blue and red refer to the color of the toggle actuator (the lever you flip). Electrically and mechanically they are identical — the color choice is purely for visual identification or panel aesthetics. The waterproof cap accessory is compatible with the blue actuator variants only.
What does 'Momentary' mean for the MTS-123 and MTS-223 models?
Momentary (also called spring-return) means the switch only stays in the activated position while you hold the lever. When released, it springs back to the center or default position. This is useful for applications like push-to-test, jog controls, or horn circuits where you only want the circuit active while actively pressing.
Are these switches compatible with standard US and metric wiring terminals?
Yes. MTS series switches use solder lug terminals that accept standard wire gauges typically used in low-voltage control wiring. They are generally compatible with both US AWG wire sizes and metric equivalents in the range used for signal and light-duty power circuits.
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