Steca TR 0603mc+

6 inputs, 3 outputs

  • Compact, multipart designer casing
  • Multifunction graphical LC display with backlighting
  • Animated representation of the systems and operating states
  • Multilingual menu navigation
Steca TR 0603 mc
Steca TR 0603 mc  technische Zeichnung
Steca TR 0603 mc
Steca TR 0603 mc  technische Zeichnung


The solar thermal controller Steca TR 0603mc+ is the result of a consistent refinement of its highly successful predecessor TR 0603mc. In particular, the EU’s Ecodesign Directive (ErP) has been taken into account in order to control solar thermal pumps with an EEI (Energy Efficiency Index) < 0.23. These energy-efficient, so-called high-efficiency pumps (HE pumps) are controlled by a special PWM control signal.

The modular controller concept is a special highlight. The 40 pre-programmed configurations and numerous additional functions make for the controller's universal application. Depending on individual needs, the controller can be equipped with additional expansion and heating circuit modules at any time. The large graphic display shows the animated control circuits, which allows you to view the operating statuses of each system. The Steca TR 0603mc+ 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. HE pumps, standard AC wet pumps, and switching valves are controlled using three outputs, some of which can be speed-controlled.


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

Product features

  • Flexible and expandable
  • Master-slave concept
  • 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
  • Modular extensions are possible with heating circuit controllers and expansion modules
  • Screw terminals allow universal and rapid installation
  • Integrated Steca TPC 1 bus


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


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


  • 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
  • Two loading zones


Product data sheet

  •  Steca TR 0603mc+ productdatasheet DE · pdf · 0,980 MB
  •  Steca TR 0603mc+ productdatasheet EN · pdf · 0.979 MB
  •  Steca TR 0603mc+ productdatasheet FR · pdf · 0,984 MB


  •  Steca TR 0603mc+ manual DE · pdf · 1.797 MB
  •  Steca TR 0603mc+ manual FR · pdf · 2.028 MB

Product pics, technical drawings, etc.

  •  Steca TR 0603mc+ product pic drawing · jpg, 300 DPI, high quality · 0.511 MB
  •  Steca TR 0603mc+ product pic drawing · jpg, 72 DPI, web quality · 0.257 MB

Technical data

 TR 0603mc+
System voltage
230 V AC (± 15 %), 50 Hz
System voltage optional
115 V AC (± 15 %), 60 Hz
1.57 W
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. 250 W (230 V) or PWM control signal for pump speed (PWM R1, PWM R2); 1 x switch output relay (R3), max. 800 W (230 V) or R3 voltage free
Hydraulic schemes
Ambient temperature
0 °C … +45 °C
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 170 x 46 mm [0.00 x 0.00 x 0.00 inch]
450 g [0.00 oz]
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