Steca TR 0301 U

3 inputs, 1 output


The Steca TR 0301 U controller was developed specifically for the North American market as a variant of the basic Steca TR 0301 controller. Special approval (ETL mark) via a testing laboratory recognised in the United States as an NRTL (Nationally Recognized Testing Laboratory) means that the relevant safety standards and minimum requirements of the North American market have been met.

The special feature of the controller types from the Steca TR 0301 series is the graphically animated display, which are used to completely visualise the operating status and solar circuit of a solar system.

The clear display guarantees simple operation through the consistent use of pictograms. The design of the controller was created together with an internationally renowned design centre. The controller monitors and controls solar thermal systems with one collector array and one storage tank. The controller also takes over important system monitoring and safety functions, ensuring the continuous and safe operation of the entire system. The numerous additional functions of the Steca TR 0301 include the maximum storage tank temperature, a tube collector function, a frost protection function, a holiday or re-cooling function and the option of selecting the temperature display in degrees Celsius (°C) or Fahrenheit (°F). The operational safety of the system is supported by sophisticated fault diagnostics. Here, the multicoloured LCD backlighting ensures that any faults that have occurred can be found quickly and reliably, helping to rectify quickly any faults.

The Steca TR 0301 U controller is supplied with a pre-assembled US network cable and a pre-installed plug-in pump output.

Steca TR0301 U technische Zeichnung


Product features

  • Compact, multipart designer casing
  • Maximum storage tank temperature
  • High level of operational safety through fault diagnosis
  • Temperature display °C / °F
  • Collector overtemperature disconnection
  • Spring clamp terminals allow rapid and easy installation


  • Graphical LC display with backlighting
  • Animated representation of the systems and operating states


  • Non-verbal menu navigation
  • Side switch for manual, auto, off


  • Holiday (storage tank recooling)
  • Interval / tube collector
  • Anti-freeze
  • Display storage tank top


  •  Steca TR 0301 U productdatasheet DE · pdf · 0,957 MB
  •  Steca TR 0301 U productdatasheet EN · pdf · 0.957 MB
  •  Steca TR 0301 U manual EN · pdf · 2.190 MB
  •  Steca TR 0301 U product pic drawing · jpg, 300 DPI, high quality · 0.719 MB
  •  Steca TR 0301 U product pic drawing · jpg, 72 DPI, web quality · 0.343 MB

Technical data

 TR 0301 U
System voltage
120 V AC, 60 Hz
System voltage optional
240 V AC, 60 Hz
1.07 W [0.001 HP]
Temperature control class
Energy efficiency
1 %
Number of inputs
3 x temperature (Pt1000)
Number of outputs
1 x switch output relay (R1), max. 400 W / 0.5 HP (120 V AC) or 800 W / 1 HP (240 V AC)
Line cord
75 inch, 3 x 18 AWG at 221 °F
Turn-on temperature difference
16 F
Turn-off temperature difference
8 F
Ambient temperature
0 °C [+32 °F] … +45 °C [+113 °F]
Degree of protection
IP 20 / DIN 40050
Dimensions (X x Y x Z)
160 x 157 x 47 mm [6.30 x 6.18 x 1.85 inch]
350 g [12.35 oz]
Temperature sensors 2 x Pt1000
1.5 m [59 inch] silicone cable without bushing (measuring range up to +180 °C [+356 °F])
    Thank you, your request has been sent

    Your request:

    * = mandatory field

    Product comparison

    Not yet able to see all the products you want in the comparison list?
    Add more products

    How it works:
    Open a product group and add the product to the product comparison using the "+ Compare product” button.