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Compact rectangular limit switch with cross roller plunger on top, matte grey body, surface-mount base

Dayton

Dayton 12T949 Limit Switch Cross Roller Plunger SPDT 10A 300V

SKU CH-NJSJ-SPWDN

Limit switch with cross-roller plunger, SPDT contacts rated 10A at 300V and NEMA 4, 6, 6P, 12, 13 sealing

  • TypeLight Switch
  • Reliable circuit control with SPDT 10A 300V rating
  • Compact miniature body fits tight spaces at 1.97 x 1.57 x .63 in
  • Durable NEMA 12 13 4 6 6P sealing resists dust and water
  • Cross roller plunger ensures smooth precise actuation
  • Boot sealed actuator adds extra environmental protection

Limit Switch Cross Roller Plunger

The Dayton 12T949 is a miniature limit switch with a cross roller plunger actuator mounted on top. It carries a single-pole double-throw contact form rated at 10 amperes and 300 volts for both AC and DC circuits. The body measures 1.97 inches high, 1.57 inches wide and 0.63 inches deep. A boot-sealed actuator and NEMA 4, 6, 6P, 12 and 13 ratings protect the contacts in wet or dusty environments.

Replaces worn miniature limit switches

This unit serves as a direct replacement for failed miniature switches that use a top-mounted cross roller plunger and SPDT contacts. The jump is worth it when the original switch has lost sealing integrity or the actuator no longer returns reliably. Identical contact ratings and mounting holes simplify the swap without rewiring the control circuit.

Suits machine builders and maintenance teams

Engineers who need a compact, sealed position sensor for conveyors, lifts or guarding will find the ratings match the application. Buyers who require a different actuator style such as a lever or wobble stick should look elsewhere. Installers needing a larger body or higher current capacity must select a different series.

Highlights

  • Reliable circuit control with SPDT 10A 300V rating
  • Compact miniature body fits tight spaces at 1.97 x 1.57 x .63 in
  • Durable NEMA 12 13 4 6 6P sealing resists dust and water
  • Cross roller plunger ensures smooth precise actuation
  • Boot sealed actuator adds extra environmental protection

Specifications

BrandDayton
TypeLight Switch

Questions about this item

What are the body dimensions for mounting the 12T949 limit switch?

The switch body measures 1.97 in height, 1.57 in width and 0.63 in depth for surface mounting.

How is the cross roller plunger actuator wired, and what mistake should be avoided?

Wire the SPDT contacts for the 10 A, 300 V AC or DC rating; the common error is reversing normally open and normally closed terminals.

When should the boot-sealed actuator be inspected or replaced?

Check the boot seal during routine maintenance; replace the switch if the seal is torn or the plunger action feels gritty.

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