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Square transparent digital temperature controller with dual red LED display

Tempco

Tempco TEC-4100 TEC56025 HVAC Control, 90-250V, 2A Relay

SKU CH-DFKW-4CFP4

Programmable temperature controller with PID control, dual red LED display and 2 A relay output for 90–250 V AC systems

  • Product colorTransparent
  • PID control mode maintains precise temperature stability
  • Wide 90-250V AC input suits global power supplies
  • Dual red LED display shows clear readings
  • Compact 3.75 x 3.75 x 2.56 in DIN quarter-size fits tight panels
  • CE, CSA and UL listed for regulated installations

TEC-4100 Digital Temperature Controller

The Tempco TEC-4100 is a digital temperature controller designed for HVAC systems requiring precise regulation. It accepts a universal sensor input and operates on a wide 90 to 250V AC supply. A 2 A relay output handles the switching function for heating or cooling equipment. The unit fits a standard 1/4 DIN panel cut-out.

Suits panels needing PID control

This controller suits installers who need PID control mode and a clear dual red LED display for set-point and process values. It provides SPDT and SPST NO contact options for flexible wiring. Buyers who need more than two alarm relays or a different mounting format should look at other models.

2 A relay output at 90 to 250V AC

The single specification that decides fit is the 2 A relay output rating combined with the 90 to 250V AC input range. This determines the load the controller can switch directly without an external contactor. Verify that the connected heater, valve or compressor coil stays within this 2 A limit at the supply voltage used.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $195.99
Pricier than about 82% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameTEMPCO
Product colorTransparent

Questions about this item

How do I wire the SPDT relay output on this controller, and which terminal is commonly mistaken?

Connect the load to the common and normally-open terminals for heating or normally-closed for cooling; the common terminal is often confused with the normally-closed contact, so verify with the label before powering up.

Which component will likely need replacement after extended operation?

The 2 A relay contacts are the primary wear item; repeated switching at full load will eventually degrade them, requiring relay module replacement.

At what point does the controller hit its thermal limit during continuous use?

The 10 VA power dissipation inside the 3.75 by 3.75 by 2.56 in enclosure is the first constraint; sustained full-load switching can raise internal temperature beyond safe limits without adequate panel ventilation.

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