The MTS-103 is a compact SPDT mini toggle switch with ON-OFF-ON action — a safe centre-off position between two switched circuits. Rated 5A at 125VAC / 2A at 250VAC, it panel-mounts through a standard 6mm hole and terminates on 3 solder lugs. A reliable, everyday switch for RC builds, automotive dash panels, and general project wiring.
- SPDT ON-OFF-ON — safe centre-off position
- Rated 5A @ 125VAC / 2A @ 250VAC
- 6mm panel cutout (M6 x 0.75 thread)
- 3-pin solder lug terminals
- Compact body — 32 x 13 x 11.75mm
- Rated for 10,000 switching cycles
- Operating range -40°C to +85°C
- Sold individually
Wiring & getting started
- Position 1 (up)
Common (centre pin) connects to Circuit A (outer pin 1).
- Centre (off)
Common disconnects from both outer pins — nothing is powered in this position.
- Position 2 (down)
Common (centre pin) connects to Circuit B (outer pin 3).
- Typical use
Select between two circuits with a safe off state in between, e.g. two-speed fan selection or a motor forward/off/reverse switch.
Specifications
What's in the box
SPDT ON-OFF-ON, 3-pin solder lug, ready to panel mount. Includes 1 mounting nut. Sold individually.
Great for
Common questions
What's the difference between ON-OFF-ON and ON-ON?
ON-OFF-ON (this switch) has three positions — up, a safe centre off, and down. The MTS-102 is ON-ON and only has two positions, with no centre-off, so one circuit is always live.
How do I wire it to reverse a DC motor with a safe off?
Connect motor + to pin 1, motor - to pin 3, and battery + to pin 2. The centre position disconnects the motor entirely; flicking to either side reverses polarity to change direction. Add a relay if your motor draws more than 2A.
What size hole do I need to drill?
6mm diameter. The switch uses an M6 x 0.75 thread with a locking nut to secure it to the panel.
Please note: For mains AC applications, installation must be carried out by a licensed electrician in accordance with NZ wiring standards.