MTS Series Mini Toggle Switch SPDT DPDT ON-ON ON-OFF-ON for Car Boat Dashboard

The MTS model number encodes the circuit type and lever length. The first digit indicates poles and positions:

• 1xx — SPDT ON-ON (2-position, no center off)
• 2xx — SPDT ON-OFF-ON (3-position, with center off)
• 3xx — DPDT ON-ON (2-position, dual pole)
• 4xx — DPDT ON-OFF-ON (3-position, dual pole)

The last digit indicates lever length: 2 = short lever, 3 = long lever. For example, MTS-202 is a short-lever SPDT ON-OFF-ON switch, while MTS-303 is a long-lever DPDT ON-ON switch.

SPDT (Single Pole Double Throw) controls one circuit and routes it to one of two outputs — ideal for simple on/off or A/B switching on a car dashboard or model railway. DPDT (Double Pole Double Throw) controls two independent circuits simultaneously with the same lever action, making it suitable for reversing DC motors, switching stereo audio channels, or controlling two separate loads at once.

MTS series mini toggle switches are generally rated for 6A at 125V AC or 3A at 250V AC in typical applications. For 12V DC automotive or marine circuits, the current capacity is generally higher — typically up to 6A or more — but always verify the rating printed on your specific switch body before use in high-current circuits.

These switches are designed for general-purpose panel-mount use. For marine or outdoor environments with direct moisture or spray exposure, a waterproof boot cover (sold separately) is strongly recommended to protect the switch body and contacts from corrosion. In most cases, the metal bushing and nylon housing hold up well in sheltered marine console installations.

MTS series mini toggle switches typically require a 6mm (approximately 1/4") diameter mounting hole. The threaded bushing and hex nut secure the switch to panels up to approximately 3–5mm thick. Confirm the exact bushing thread spec on your unit before drilling your dashboard or enclosure panel.

Any model with ON-OFF-ON in its designation includes a stable center-off position. In this series, that means: MTS-202, MTS-203, MTS-402, MTS-403, MTS-123, and MTS-223. If you only need a simple two-position ON-ON switch with no center off, choose MTS-102, MTS-103, MTS-302, or MTS-303.

Yes. DPDT ON-ON models (MTS-302, MTS-303) are commonly wired in an H-bridge configuration to reverse the polarity across a small DC motor, making them a popular choice for model railway direction control, robotics, and DIY actuator projects. The DPDT ON-OFF-ON models (MTS-402, MTS-403) add a center-off position, which cuts power to the motor when the lever is centered.

Short-lever variants (ending in 2, e.g. MTS-102) have a compact actuator that sits closer to the panel surface — preferred when space is tight or when accidental actuation must be minimized. Long-lever variants (ending in 3, e.g. MTS-103) provide more leverage and are easier to operate with gloves or in low-visibility conditions such as a boat helm or car dashboard at night.