STC-2303 Refrigerator Defrost Digital Thermostat

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STC-2303 Refrigerator Defrost Thermostat is a high-low limit digital thermostat, with 2 conditional output relays that connect to the refrigerator and the defrosting unit, the power supply status of the wired load was controlled by temperature and time.  

Out of stock

Mindmap of Haswill Compact Panel Controller

The most simple way to choose your thermostat for Refrigeration, Heating, Evaporator Fan, Alarm, and Defrosting

Click the Thermostat types to see all thermostat types.

Click the Compact Panel Thermostats to learn more technical differences.


The evaporator defrost controlling function of the STC-2303 digital thermostat is based on the time setting and the stop-defrosting temperature value; it loops the defrosting automatically by time and temperature.

Features of STC-2303 defrost temperature controller:

  • 6 touch-sensitive keys;
  • The power on/off temperature determines the ideal temperature range, set them directly by shortcut keys;
  • Embed NVM to auto memory exists parameters, resume all data once power back, need not configure it again;
  • Adjustable Temperature Calibration;
  • Control the refrigeration by temperature and the editable compressor protection delay time, the compressor works 15mins and stops 30 mins once sensor error;
  • Control the defrosting by time and temperature, and offers 2 options of time count mode for defrosting cycle, and the artificial forced-defrost available;
  • Supply an editable water dripping time after defrosting;
  • Alarm by error code on the display and the buzzer screams;
  • Control the over-temperature alarm of the freezer room by time and temperature, and offers 2 types of time count mode for the alarm delay time.

Front Panel of STC-2303-220V

Haswill Electronics stc 2303 temperature controller 1 Front panel

Front panel

Haswill Electronics stc 2303 temperature controller 2 Power On Self Testing

Power On Self Testing

Haswill Electronics stc 2303 temperature controller 3 Normal Working

Normal Working

Wiring Diagram of STC-2303-220V

STC 2303 digital temperature controller wiring diagram

STC 2303 digital temperature controller wiring diagram

Haswill Electronics stc 2303 temperature controller 4 wiring photo

Haswill Electronics STC 2303 temperature controller 4 wiring photo

Function Menu of STC-2303-220V

F1Defrosting Lasting Time112030Min
F2Defrosting Cycle / Interval Time01206Hour
F3Defrosting Cycle / Interval Time Count mode
0The sum working time of the controller
1The sum working time of the compressor
F4Water dripping Time01203Min
F5Defrosting by010Min
1Hot Gas
F6Defrosting Stop Temperature-405010°C
F9Delay Time for the compressor Protection0100°C
F10Alarm Delay time from the controller power on0.124.02.0Hour
F11Alarm Over-Temperature Value0505°C
F12Alarm Delay time after F10
(count time from the moment of the F10 over)
F13Temperature Calibration-10100°C
The F14 is not available, since it was designed as the refrigeration thermostat with the defrosting managing function.

Manual of STC-2303-220V Digital thermostat

manual of STC 2303 digital defrost thermostat page 1

manual of STC 2303 digital defrost thermostat page 1

manual of STC 2303 digital defrost thermostat page 2

manual of STC 2303 digital defrost thermostat page 2

Additional information

BasicHS Code: 903210
Input Voltage: 220V AC
Output Current: 10A | Other Current Customizable
Front PanelResolution: 0.1℃ Resolution
Interactive Mode:
Front Size (W*H): 85*35mm
Mounting (W*H): 71*29 mm
FunctionThermostat Types:
Main Function:
Time Delay: | |
Sensor & Cable:
Alarm Temperature:
Temp. RangeMeasure Min: -40℃
Measure Max: 99.9℃
Control Min: -40℃
Control Max: 85℃
MoreOuter Package: hard paper box
Weight: 0.205 kg
Dimensions: 10.2 × 8.2 × 6 cm

FAQ of Haswill Universal Digital Thermostat

1. The price is real or for reference?

Real price and free shipping, random delivery by DHL / FedEx / TNT or other courier companies to Europe Countries, You may learn about this from the FAQs page, The MOQ is 200USD.

2. Celsius VS Fahrenheit

All of our digital temperature controllers default in Celsius degree, part of them available in Fahrenheit with MOQ.

3. Parameter Comparison

Compact panel digital temperature controllers tables

4. Package

Common package could load 100 PCS / CTN digital temperature controllers.

5. Accessories

We suggest you buy 5% ~ 10% spare parts like clips and sensors as stock.

6. Warranty

Default one-year (extendable) quality warranty to all our controllers, we will offer free of charge replacement if found a quality defect.

more questions? click FAQs


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Why us?

  1. The shell fire retardant class of this temperature controller STC-2303-220V is V-0;
  2. The relays we adopt comes from big factory HongFa;
  3. The inside material of the wiring pin is copper, some factories use the iron pin which is easy to rusty, just test it with a magnet;
  4. The transformer we adopt is the low-frequency one, more coils, sufficient weight (220V net weight 70g+), and longer service time;
  5. The Chipboard was made big factory, stable, with high anti-interference performance.
In brief, our products quality reliable, long life time, safe, and with competitively price!

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