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Small rectangular HVAC snap disc control, silver metal body with two terminals, one inch tall

Value Brand

Value Brand Snap Disc Control Auto Reset Opens 200°F

SKU CH-2H4J-HKMFQ

A snap-disc limit control that automatically resets and opens the circuit at 200 °F for HVAC safety

  • Auto-reset restores operation without manual intervention
  • Opens at 200°F to protect equipment from overheating
  • 40°F differential prevents rapid cycling
  • SPST switch handles 120–277 V circuits
  • Compact 1 × 2¾ × 1½ in fits tight enclosures

Snap Disc Limit Control for HVAC Systems

The Value Brand snap disc control is an automatic-reset limit switch designed for HVAC equipment. It opens on temperature rise to interrupt the circuit when the set point is reached. The device operates across a 160 to 200 degrees Fahrenheit range with a 40-degree differential. It suits technicians and facility managers needing a reliable high-limit safety device.

Verify Voltage and Mounting Before Installation

Confirm the supply voltage falls within the 120 to 277 volt range before wiring the SPST contacts. The control measures 1 inch in height, 2 3/4 inches in width and 1 1/2 inches in depth, so check the available panel space. Ensure the 160 to 200 degrees Fahrenheit operating window matches the equipment protection requirement. No specific mounting hardware is detailed in the specifications.

Thermal Response and Electrical Ratings in Service

The switch opens automatically at the calibrated temperature and resets once conditions fall below the differential threshold. Rated for 125 volts at 25 amps and 277 volts at 21.6 amps, the contacts handle typical HVAC control circuits. The automatic reset action restores operation without manual intervention after a limit event. Power draw is limited to the control circuit current.

Highlights

  • Auto-reset restores operation without manual intervention
  • Opens at 200°F to protect equipment from overheating
  • 40°F differential prevents rapid cycling
  • SPST switch handles 120–277 V circuits
  • Compact 1 × 2¾ × 1½ in fits tight enclosures

Specifications

BrandZORO SELECT

Questions about this item

Does the snap disc control come with mounting hardware or do I need to buy brackets separately?

The unit is supplied as the control only; mounting brackets, screws or wiring connectors are not included and must be sourced separately.

How do I decide between the 160 °F and 200 °F open temperatures listed for this control?

Choose 160 °F if the equipment must shut off at a lower temperature, or 200 °F for higher-temperature protection; the differential is 40 °F so the contacts will re-close at 120 °F or 160 °F respectively.

What does the 277 V rating mean when the control is installed in a 120 V furnace circuit?

The control is rated for 120–277 V AC, so it will operate safely on a 120 V circuit; the 10 A resistive and 5 A inductive ratings at 125 V apply directly to that voltage.

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