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home > Mini Toggle Switch SPDT 3-Position (ON)-OFF-(ON) MTS-123 5A 125V AC — 10-Pack > Mini Toggle Switch SPDT 3-Position (ON)-OFF-(ON) MTS-123 5A 125V AC — 10-Pack

Mini Toggle Switch SPDT 3-Position (ON)-OFF-(ON) MTS-123 5A 125V AC — 10-Pack main image 0

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Mini Toggle Switch SPDT 3-Position (ON)-OFF-(ON) MTS-123 5A 125V AC — 10-PackMini SPDT Toggle Switch (ON) OFF (ON) Reliable Momentary Control for DIY Panels & Electronics If you have ever had a momentary control button fail mid project or spent hours hunting for a compact, reliable mini toggle switch that actually fits your enclosure you know how frustrating sourcing the right part can be. Hobbyists, makers, and automotive enthusiasts building custom control panels need a switch that responds instantly, mounts cleanly, and

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Mini SPDT Toggle Switch (ON)-OFF-(ON) — Reliable Momentary Control for DIY Panels & Electronics

If you have ever had a momentary control button fail mid-project — or spent hours hunting for a compact, reliable mini toggle switch that actually fits your enclosure — you know how frustrating sourcing the right part can be. Hobbyists, makers, and automotive enthusiasts building custom control panels need a switch that responds instantly, mounts cleanly, and holds up through repeated use.

This listing includes 10 pieces of the MTS-123 mini SPDT toggle switch, each featuring a 3-pin solder lug terminal configuration and a compact metal bushing for panel mounting. The switches are rated at 5A / 125V AC (typically derated to 2A at 250V AC) and operate in a 3-position (ON)-OFF-(ON) configuration — both outer positions are momentary (spring-return to center OFF). The bushing diameter is typically 6mm (approx 1/4"), fitting standard pre-drilled panel holes. Sold as a 10-pack to cover a full build or keep spares on hand.

These mini toggle switches are a natural fit for DIY electronics control panels, RC car and truck wiring harnesses, model railroad layouts, amateur radio accessory switching, and custom automotive dash builds where a momentary-action SPDT toggle switch is needed in a tight space.

🔌 Compatibility: Designed for standard panel cutouts — typically 6mm (approx 1/4") diameter. Fits most DIY enclosures, project boxes, and automotive dash panels. Thread standard is generally M6 or 1/4"-40 UNS. Verify your panel spec before installation.

⚠️ Note: These are momentary (ON)-OFF-(ON) switches — the outer positions spring back to center when released. If you need latching ON-OFF-ON behavior, please confirm before ordering or contact us.

✅ Key Features of These Mini SPDT Toggle Switches

⚡Momentary (ON)-OFF-(ON) Action — Both outer positions are spring-return momentary, making these ideal for jog controls, horn circuits, and momentary-trigger applications in DIY control panels.
🔩Compact Metal Bushing Construction — The threaded metal bushing provides a secure, rattle-free panel mount in enclosures with standard 6mm (approx 1/4") cutouts, without requiring additional hardware in most cases.
🔁SPDT 3-Pin Solder Lug Terminals — Single Pole Double Throw wiring gives you a common, normally-open, and normally-closed terminal — versatile for a wide range of switching circuits in amateur radio and automotive wiring projects.
🛡️5A / 125V AC Rated — Handles typical low-voltage AC and DC control circuits. Suitable for accessory switching in 12V automotive systems and standard 120V AC control applications within rated load limits.
📦10-Pack Value Quantity — Enough switches to complete a full multi-switch panel build, with extras for prototyping or replacements — reducing reorder delays on active projects.
🎛️MTS-123 Industry-Standard Form Factor — The MTS-123 designation is a widely recognized mini toggle switch footprint, making these drop-in compatible with existing panel layouts that already use this form factor.

📐 Technical Specifications — Mini SPDT Toggle Switch MTS-123

Switch Type	SPDT (Single Pole Double Throw)
Operating Mode	(ON)-OFF-(ON) — Momentary outer positions, center OFF latching
Number of Positions	3
Number of Pins / Terminals	3 (solder lug)
Voltage Rating	125V AC (typically derated to 2A at 250V AC)
Current Rating	5A at 125V AC
Panel Mounting Hole	Typically 6mm (approx 1/4") diameter — see variant options
Bushing Thread	Generally M6 or 1/4"-40 UNS — contact us to confirm
Model / Part Number	MTS-123
Quantity per Pack	10 pieces
Recommended Applications	DIY control panels, RC vehicles, automotive accessories, amateur radio, model trains
Outdoor / Waterproof Rating	Not rated for outdoor use without protective boot (sold separately)
Country of Origin	See variant options

❓ Frequently Asked Questions

How do I choose the right toggle switch size for my project?

For most DIY control panels and enclosures, a mini toggle switch with a bushing diameter of typically 6mm (approx 1/4") fits standard pre-drilled holes. Measure your panel cutout before ordering. If you are replacing an existing switch, match the thread diameter and bushing length of the original part to ensure a clean fit without enlarging the hole.

What is the current and voltage rating, and can I use it in a 12V DC automotive circuit?

This switch is rated at 5A at 125V AC. For 250V AC circuits, the rating is generally derated to 2A. For 12V DC automotive accessory circuits, these switches are typically suitable for loads up to 5A DC, though DC ratings can vary — verify your specific load before wiring. Do not exceed the rated values.

Can this toggle switch be used outdoors or in humid environments?

The MTS-123 mini toggle switch is not rated for outdoor or waterproof use in its standard form. For outdoor or high-moisture applications, a weatherproof rubber boot cover (sold separately) is typically recommended to protect the switch mechanism from moisture, dust, and debris.

What does (ON)-OFF-(ON) mean and how is it different from ON-OFF-ON?

The parentheses indicate a momentary position. In an (ON)-OFF-(ON) switch, the two outer positions activate only while the lever is held — releasing it causes the lever to spring back to the center OFF position. This differs from ON-OFF-ON, where all three positions are latching. Use (ON)-OFF-(ON) for momentary actions like horn triggers, jog controls, or pulse signals.

What thread standard does the MTS-123 bushing use — will it fit my panel?

The MTS-123 mini toggle switch typically uses a metric M6 or standard 1/4"-40 UNS threaded bushing for panel mounting. Check your panel hole specification to confirm compatibility. If you need exact thread confirmation for a specific application, contact us before ordering.

How are the 3 pins wired on an SPDT toggle switch?

The center pin is the Common (COM) terminal. The two outer pins are the Normally Open (NO) and Normally Closed (NC) terminals. When the lever is thrown to one side, COM connects to that terminal. In the center OFF position, COM is disconnected from both. Always verify pin assignments with a multimeter before soldering.

What projects are these mini toggle switches commonly used for?

These switches are widely used in DIY electronics control panels, RC car and truck wiring harnesses, model railroad layouts, amateur radio accessory switching, custom automotive dash builds, and small appliance modifications. Their compact MTS-123 form factor makes them a go-to choice for space-constrained enclosures where a reliable momentary SPDT toggle is needed.

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Mini Toggle Switch SPDT 3-Position (ON)-OFF-(ON) MTS-123 5A 125V AC — 10-Pack

Name: Mini Toggle Switch SPDT 3-Position (ON)-OFF-(ON) MTS-123 5A 125V AC — 10-Pack
Brand: okunadegoodman.com
SKU: 85031436576
Price: 26.43 USD
Availability: InStock
Rating: 4.3276 (2436 reviews)