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Square D SPDT limit switch, grey industrial housing, side rotary actuator, surface mount

SQUARE D

SQUARE D Limit Switch SPDT 20A 600V NEMA 1 12 13 2 4

SKU CH-MXSB-KC748

An SPDT limit switch rated 20 A at 600 V AC/DC with NEMA 1, 2, 4, 12, 13 enclosure protection for surface mounting

  • TypeLight Switch
  • SPDT contacts switch two circuits from one actuator
  • 20 A at 600 V AC or DC handles heavy loads
  • NEMA 1, 2, 4, 12, 13 ratings suit indoor and outdoor use
  • Side-mounted rotary actuator fits tight enclosures
  • Compact 4.66 x 2.25 x 2.44 in body saves panel space

Industrial Limit Switch SPDT 20A

This Square D limit switch is a surface-mounted safety device rated for 20 A at 600 V AC or DC. Its SPDT contact form suits control-circuit duties in machinery, conveyors and material-handling equipment. The standard body measures 4.66 in high by 2.25 in wide by 2.44 in deep and carries NEMA 1, 2, 4, 12 and 13 enclosure ratings for indoor and outdoor use. No lever actuator is fitted; the unit accepts side-mounted rotary operators.

NEMA Enclosure Limits and Voltage Boundaries

The NEMA 1, 2, 4, 12 and 13 ratings protect against falling dirt, dripping water, splashing water, circulating dust and oil or coolant seepage, but they do not certify submersion or hazardous-location service. The 600 V maximum applies equally to AC and DC circuits; exceeding this voltage breaks the rating. The 20 A resistive load limit must not be surpassed, and inductive loads may require additional suppression not provided by the switch itself.

Pre-Installation Checks for Buyers

Verify that the mounting surface accommodates the 2.25 in by 2.44 in footprint and that the 4.66 in height clears any guards or cable runs. Confirm the control circuit voltage is 600 V or less and the current draw stays within 20 A. Ensure the intended rotary actuator matches the side-entry shaft and that the environmental exposure matches the declared NEMA ratings — submersion, corrosive atmospheres or classified hazardous areas are not covered.

Highlights

  • SPDT contacts switch two circuits from one actuator
  • 20 A at 600 V AC or DC handles heavy loads
  • NEMA 1, 2, 4, 12, 13 ratings suit indoor and outdoor use
  • Side-mounted rotary actuator fits tight enclosures
  • Compact 4.66 x 2.25 x 2.44 in body saves panel space

Specifications

BrandSquare D
TypeLight Switch

Questions about this item

How do I choose between the listed NEMA ratings 1, 2, 4, 12, and 13 for this limit switch?

NEMA 1 is for indoor general use; NEMA 2 adds drip protection; NEMA 4 provides watertight and dust-tight sealing; NEMA 12 guards against dust, dirt, and non-corrosive liquids; NEMA 13 protects against oil and coolant spraying.

What does the 20A @ 600V rating mean when the switch is installed in a control circuit?

The contacts can safely carry up to 20 amps at 600 volts AC or DC, making it suitable for heavy-duty motor starters, solenoids, and similar industrial loads.

How does the SPDT contact form limit the wiring options for this switch?

SPDT provides one common, one normally open, and one normally closed terminal, allowing a single actuator to toggle between two separate circuits or signal paths.

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