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Square D SPDT limit switch, rectangular grey enclosure, side rotary actuator, surface mount base

SQUARE D

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

SKU CH-9YMM-PMR99

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

  • TypeLight Switch
  • SPDT contact form enables versatile circuit control
  • 20 A rating at 600 V AC and DC handles heavy loads
  • NEMA 1 2 4 12 13 enclosure resists dust water and oil
  • Side rotary actuator simplifies machine mounting
  • Compact 4.66 in height fits tight panels

SPDT Limit Switch for Industrial Control

This Square D limit switch uses a single-pole double-throw contact form to open or close a circuit when its rotary actuator is triggered. Rated for 20 A at 600 V on both AC and DC supplies, it suits machine-tool sequencing, conveyor safety interlocks and similar automation tasks where reliable position sensing is required.

Verify Mounting Surface and NEMA Environment

Confirm that the mounting area can accept a surface-mounted body measuring 4.66 in high by 2.25 in wide by 2.44 in deep. The enclosure carries NEMA 1, 2, 4, 12 and 13 ratings, so ensure the intended location matches one of these protection levels and that no lever actuator is needed for the application.

Fits Standard Panels and Frees Wiring Space

The compact rectangular body mounts directly on flat panels or machine frames without additional brackets. Its side-mounted rotary actuator leaves the front face clear for conduit entries, while the SPDT contacts allow one switch to handle both a control signal and a safety circuit, reducing the number of devices in the panel.

Highlights

  • SPDT contact form enables versatile circuit control
  • 20 A rating at 600 V AC and DC handles heavy loads
  • NEMA 1 2 4 12 13 enclosure resists dust water and oil
  • Side rotary actuator simplifies machine mounting
  • Compact 4.66 in height fits tight panels

Specifications

BrandSquare D
TypeLight Switch

Questions about this item

What comes with the SPDT limit switch and what must be purchased separately?

The switch body is supplied as a complete unit with SPDT contacts rated 20 A at 600 V AC or DC, a standard body measuring 4.66 in high by 2.25 in wide by 2.44 in deep, and surface-mount provisions. No lever or rotary actuator is included, so a compatible actuator must be bought separately.

Which NEMA-rated version should I choose for my environment?

The same switch carries NEMA 1, 2, 4, 12 and 13 ratings. Choose it when the installation needs protection against falling dirt, dripping or splashing water, hose-directed water, circulating dust, or oil and coolant seepage; no separate version exists for each rating.

What does the 20 A 600 V rating mean once the switch is wired into a machine circuit?

It means each contact set can continuously carry up to 20 amperes at up to 600 volts AC or DC under the listed NEMA enclosure conditions, so the switch can directly control motor starters, solenoids or lighting loads within those limits without an intermediate relay.

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