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Steca TR 0603mc U

6 inputs, 3 outputs

  • Compact, multipart designer casing
  • Multifunction graphical LCD display with backlighting
  • Animated representation of the systems and operating states
  • Multilingual menu navigation


The Steca TR 0603mc U controller was specially developed for the North American market based on the Steca TR 0603mc basic controller. With its special certification (ETL label) from a Nationally Recognized Testing Laboratory (NRTL) in the US, the controller meets the safety standards and minimum requirements of the North American market.

The equipment is connected inside the installation casing using either a plug & play solution for the mains and pump connections or alternatively 1/2 inch cut-outs.

As a particular highlight, the Steca TR 0603mc U stores the system's operational data on a SD card. The 40 pre-programmed systems and numerous additional functions allow universal use of the controller. The large graphic display shows the animated control circuits, which allows you to view the operating statuses of each system. The Steca TR 0603mc U has six inputs for recording temperatures or pulse values, as well as an extra Grundfos Direct Sensors™ input for combined temperature and flow rate measurement. Pumps and switching valves are controlled using three outputs, some of which can be speed controlled.


Technical drawing: Steca TR 0603mc U 6 inputs, 3 outputs

Product features

  • Compact, multipart designer casing
  • Electronic speed control
  • High level of operational safety through fault diagnosis
  • Hours-of-operation logger
  • Software update possible
  • Storage tank target temperature loading
  • Seasonal systems (loading of pool / storage tank according to the time of the year)
  • Daily pump start
  • Plug & play for 120 V AC mains and pump connections in installation casing
  • Screwed connections facilitate fast sensor installation
  • Integrated Steca TPC 1 bus


  • Multifunction graphical LCD display with backlighting
  • Animated representation of the systems and operating states


  • Multilingual menu navigation
  • Side switch for manual, auto, off


  • Installation casing with 1/2 inch cut-outs as an alternative to plug & play


  • Data logger on SD card
  • Heat quantity (Grundfos Direct Sensors™, pulse generator, determination)
  • Heating return increase
  • Reduction of stagnation phases
  • Holiday (storage tank recooling)
  • Circulation (controlled by temperature / time / pulse)
  • Back-up heating
  • Solid fuel boiler
  • Storage tank quick charge
  • Bypass
  • Thermostat
  • Differential thermostat
  • Timer
  • Interval / tube collector
  • Anti-freeze
  • Anti-legionella cyclical storage tank heating
  • Display storage tank top
  • Alarm output
  • Two loading zones


Product data sheet

  •  Steca TR 0603mc U productdatasheet DE · pdf · 0,259 MB
  •  Steca TR 0603mc U productdatasheet EN · pdf · 0.259 MB
  •  Steca TR 0603mc U productdatasheet ES · pdf · 0,263 MB
  •  Steca TR 0603mc U productdatasheet FR · pdf · 0,265 MB


  •  Steca TR 0603mc U manual EN · pdf · 5.289 MB

Product pics, technical drawings, etc.

  •  Steca TR 0603mc U product pic 3D · jpg, 300 DPI, high quality · 1.089 MB
  •  Steca TR 0603mc U product pic 3D · jpg, 72 DPI, web quality · 0.329 MB
  •  Steca TR 0603mc U product pic · jpg, 300 DPI, high quality · 1.019 MB
  •  Steca TR 0603mc U product pic · jpg, 72 DPI, web quality · 0.296 MB
  •  Steca TR 0603mc U product pic drawing · jpg, 300 DPI, high quality · 0.590 MB
  •  Steca TR 0603mc U product pic drawing · jpg, 72 DPI, web quality · 0.292 MB

Technical data

 TR 0603mc U
System voltage
120 V AC, 60 Hz
System voltage optional
240 V AC, 60 Hz
1.57 W [0.003 HP]
Temperature control class
Energy efficiency
1 %
Number of inputs
5 x temperature (Pt1000), 1 x temperature (Pt1000) or pulse
Additional inputs
1 x Grundfos Direct Sensors™ (temperature / flow rate)
Number of outputs
2 x triac for speed control (R1, R2), max. 130 W / 0.17 HP (120 V AC); 1 x switch output relay (R3), max. 400 W / 0.5 HP (120 V AC) or R3 voltage free
Additional output
1 x alarm output
Line cord
75 inch, 3 x 18 AWG at 221 °F
Hydraulic schemes
Ambient temperature
0 °C [+32 °F] … +45 °C [+113 °F]
SD card, RS-232, RS-485 (Steca TPC 1 bus)
Data logging
SD card
Degree of protection
IP 20 / DIN 40050
Dimensions (X x Y x Z)
170 x 178 x 90 mm [6.69 x 7.00 x 3.54 inch]
1500 g [48.23 oz]
Solar system, collector, single-family house

Solar thermal systems

Solar thermal systems convert solar irradiation into heat so that it can be used to heat domestic hot water or for back-up heating.more
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