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Small rectangular thermostat with metal probe and terminals

SUPCO

SUPCO Plenum Thermostat Limit Control 250/210°F

SKU CH-BJFB-K6TF9

Automatically resets after opening at 250°F and closing at 210°F to protect HVAC equipment

  • Product weight0.25
  • Product typeFixed Temp, Auto Reset Plenum Mount
  • Auto reset restores operation after cool-down
  • Opens at 250 °F to protect against overheating
  • Closes at 210 °F for automatic restart
  • Handles 15 A resistive at 120 V AC
  • Handles 10 A resistive at 240 V AC

Plenum Thermostat Limit Control

The SUPCO plenum thermostat provides automatic limit control for heating systems, opening on temperature rise and resetting when the temperature falls. It is suited for HVAC technicians and facility managers who need a reliable safety switch for air-handling equipment.

Fixed Temperature Auto-Reset Build

The switch uses a SPST contact form with automatic reset, so the circuit restores itself once the plenum cools to 210 degrees F. A 3 1/8 inch insertion element mounts directly in the plenum, and the compact 3 by 1 7/8 inch housing fits standard openings without extra brackets.

120/240 V AC Rating Constraints

The control handles 15 A resistive at 120 V AC and 10 A resistive at 240 V AC, with inductive ratings of 3 A and 1.5 A respectively. Loads that exceed these ampere limits or operate outside the 250/210 degree F range require a different device.

How it compares

Measured against everything we stock in Indoor & Outdoor Ceiling Fans, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 96% of the 444 comparable items (median $99.99).

Specifications

Product
Brand nameSupco
Product typeFixed Temp, Auto Reset Plenum Mount

Questions about this item

What voltage range does the 120/240V AC limit control support and what current does it cap at each level?

It operates on 120V AC at up to 15 A resistive and 3 A inductive, and on 240V AC at up to 10 A resistive and 1.5 A inductive.

What are the insertion length and overall dimensions required to mount this plenum thermostat?

The insertion length is 3 1/8 in, overall height is 3 in and overall width is 1 7/8 in.

How is the SHL series plenum thermostat wired and what common mistake should be avoided?

Wire the SPST contacts in series with the load circuit; the switch opens on temperature rise at 250°F and auto-resets when it falls to 210°F — do not reverse the line and load connections.

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