MTS‑103 Mini Toggle Switch — SPDT, 3‑Position (ON‑OFF‑ON)

A compact SPDT mini toggle switch (MTS‑103) with 3 positions (ON‑OFF‑ON), a 1/4‑40 threaded bushing for 6.35 mm (1/4-inch) panel holes, and solder‑lug terminals for quick wiring. Ideal for control panels, mode selection, and low‑voltage logic.

Key Features

SPDT (Single Pole, Double Throw) — true 3‑position ON‑OFF‑ON action
Panel‑mount with 1/4‑40 threaded bushing; fits 6.35 mm (1/4-inch) round cutout
Solder‑lug terminals — fast hookup to wire leads
Positive, tactile lever action for reliable switching
Ideal for mode select, logic control, test fixtures, DIY and hobby electronics

Specifications

Contact Form: SPDT (3 terminals), 3 positions: ON‑OFF‑ON
Electrical Rating: 6A @ 125 VAC, 3A @ 250VAC
Mounting: Panel‑mount 1/4‑40 threaded bushing; 6.35mm (1/4-inch) panel hole with supplied nut and washer
Terminals: Solder lugs
Body Dimensions: Approx. 13.2 x 7.8 x 9.5 mm body; overall height ≈ 33mm (varies by lever)
Lever: Metal toggle

Mini toggle switch MTS‑103 – ON‑OFF‑ON pinout and full dimension guide for panel‑mount applications

MTS Series Mini Toggle Switch — Pinout Summary

Models: MTS‑102 • MTS‑103 • MTS‑202 • MTS‑203

This quick reference shows the switching logic, contact numbering, and rear terminal views for the most common MTS mini toggle switches. Use it to wire SPDT and DPDT configurations with confidence—whether you need simple On‑On control or On‑Off‑On.

MTS‑102 / MTS‑103: SPDT (single pole, double throw) variants for On‑On and On‑Off‑On.
MTS‑202 / MTS‑203: DPDT (double pole, double throw) equivalents for parallel circuits and cross‑over wiring.
Numbered back views: Each diagram maps physical terminals to the schematic symbol for error‑free wiring.

MTS series pinout summary showing MTS‑102, MTS‑103, MTS‑202, and MTS‑203 with schematic positions and numbered back views — Pinout and back‑view terminal numbering for MTS‑102, MTS‑103, MTS‑202, and MTS‑203.

Applications

Mode selection, logic level routing, and signal control
Panel controls for hobby projects and test fixtures
Reversing control (with cross‑wiring) on small DC loads

What’s Included

1 × MTS‑103 Mini Toggle Switch
Mounting nut and washer

MTS (Mini Toggle Switch) Model Comparison

Quick reference for the most common MTS mini-toggle variants.

Model	Poles / Throws	Switch Positions	Pins	Typical AC Ratings	Typical Mounting
MTS‑102	SPDT	ON‑ON	3	6 A @ 125 VAC / 3 A @ 250 VAC	Panel‑mount; ~6 mm (1/4-inch) hole
MTS‑103	SPDT	ON‑OFF‑ON	3	6 A @ 125 VAC / 3 A @ 250 VAC	Panel‑mount; ~6 mm (1/4-inch) hole
MTS‑202	DPDT	ON‑ON	6	6 A @ 125 VAC / 3 A @ 250 VAC	Panel‑mount; ~6 mm (1/4-inch) hole
MTS‑203	DPDT	ON‑OFF‑ON	6	6 A @ 125 VAC / 3 A @ 250 VAC	Panel‑mount; ~6 mm (1/4-inch) hole

Legend

SPDT: Single‑Pole, Double‑Throw (3 terminals)
DPDT: Double‑Pole, Double‑Throw (6 terminals)
ON‑ON: Two ON positions (or One On and One Off)
ON‑OFF‑ON: Two ON positions with a centre OFF

Optional Protection Accessory

Q84D 6 mm dust cap for MTS-series toggle switches

For added protection, the Q84D 6 mm Dust Cap is available separately. This durable rubber boot helps shield the MTS‑103 toggle actuator from dust and light moisture, improving reliability in workshop, automotive, and general‑purpose applications.

View the Q84D Dust Cap to add optional protection to your MTS‑103 installation.