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Small metal HVAC plenum thermostat with insertion probe and terminal connections

SUPCO

SUPCO SHL515 plenum thermostat 200-160F

SKU CH-CM6B-EKBBG

A plenum limit thermostat that opens on temperature rise at 200°F and resets automatically at 160°F, rated for 120V and 240V AC circuits

  • Automatic reset restores operation without manual intervention
  • Opens at 200°F and closes at 160°F for precise limit control
  • Handles 15A resistive at 120V AC for reliable switching
  • 3 1/8 in insertion length fits standard plenum openings
  • SPST open-on-rise action provides simple safety shutdown

Limit Control Range

The SUPCO SHL515 is a plenum thermostat designed for HVAC limit control applications. It uses a single-pole single-throw contact that opens on temperature rise to interrupt the circuit. The automatic reset function restores operation once the temperature falls back to the closing point.

Voltage and Current Limits

The device operates on 120V AC or 240V AC supply voltages. Resistive loads are rated at 15 A on 120V and 10 A on 240V. Inductive loads are limited to 3 A at 120V and 1.5 A at 240V. Exceeding these ratings will cause premature contact failure.

Temperature Operating Window

The switch opens at 200°F and closes again at 160°F, providing a 40-degree differential. This range suits high-limit protection for warm air furnaces and duct heaters. It is not suitable for systems requiring a lower cut-out point or a wider differential.

Highlights

  • Automatic reset restores operation without manual intervention
  • Opens at 200°F and closes at 160°F for precise limit control
  • Handles 15A resistive at 120V AC for reliable switching
  • 3 1/8 in insertion length fits standard plenum openings
  • SPST open-on-rise action provides simple safety shutdown

Specifications

BrandSupco

Questions about this item

Should I choose a different temperature range for my furnace limit control?

This model opens at 200°F and closes at 160°F with automatic reset; select it only if your system requires exactly that 40-degree differential.

What does the 200°F opening temperature mean once the thermostat is installed in the plenum?

The contacts will open and shut off the burner when the plenum air reaches 200°F, then automatically close again once the temperature falls back to 160°F.

How do the 120V and 240V ratings limit the loads I can connect?

At 120V AC you can switch up to 15A resistive or 3A inductive; at 240V AC the limits are 10A resistive and 1.5A inductive.

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