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On-On SPDT Heavy Duty Toggle w/ Screw Terminals

On-On SPDT Heavy Duty Toggle w/ Screw Terminals

SW279

$4.29

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On-On SPDT Heavy Duty Toggle with Screw Terminals. This SPDT switch latches in either of two ON positions, with no OFF position. Rated 10A @ 250V AC, 20A @ 125V AC, 21A @ 14V DC, 3/4 HP 125-250V AC.

Use it for: choosing between two loads or modes — high/low, two light sets, or selecting between two sources.

How it is wired: SPDT (single pole, double throw): one input routed to either of two outputs. Connect with ring terminals or spade terminals under the screws. Always check that the rating covers your load, and fuse the circuit to protect the wire.

Same action and circuit in other styles: On-On SPDT Marine Toggle with Blade Terminals, On-On SPDT Heavy Duty Toggle with Blade Terminals.

See all toggle switches.

  • Circuitry: Single Pole Double Throw (SPDT)
  • Actuation: ON - ON (Maintained)
  • Electrical Ratings: 10A @ 250V AC, 20A @ 125V AC, 21A @ 14V DC, 3/4 HP 125-250V AC
  • Terminal Type: Screw Terminals
  • Operating Temperature: 0°F to 150°F (-17.8°C to +65.6°C)

Marine and Automotive Systems

With its high 21A rating at 14V DC, this switch is ideal for 12-volt marine and automotive electrical systems. It is commonly used for controlling lighting circuits, bilge pumps, auxiliary fans, and aftermarket accessories in trucks, buses, and watercraft. The robust brass and nickel plating provides excellent resistance to corrosion in these environments.

Industrial Controls and Machinery

The switch's AC ratings (up to 20A at 125V AC) and 3/4 HP motor rating allow it to be utilized in industrial control panels, factory automation equipment, and commercial generators. The slow-make, slow-break contact mechanism is particularly well-suited for handling the inrush currents associated with AC motors and heavy inductive loads.

Commercial and Emergency Equipment

Due to its long mechanical life of 100,000 cycles and durable phenolic casing, the switch is frequently specified for commercial food service equipment, office automation machines, and emergency lighting systems where reliability and safety are paramount.

• UL 94 Flame Class 94V-2 (case material flammability rating)

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