Steca TR 0603mc U

6 inputs, 3 outputs


The Steca TR 0603mc U controller was developed specifically for the North American market as a variant of the basic Steca TR 0603mc+ 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.

In the installation housing, the device connection is created either as a plug & play solution for grid and pump connections or alternatively with 1/2 inch apertures.

As a special highlight, the Steca TR 0603mc U stores the operating data from the system on an SD card. The 40 pre-programmed equipment systems and numerous additional functions facilitate universal use of the controller. The large graphic display shows animated control loops to visualise the operating states of the respective system. Steca TR 0603mc U has six inputs for temperature or pulse detection as well as an additional Grundfos Direct Sensors™ input for combined temperature and flow measurement. Three partially speed-controlled outputs are used to control pumps and switching valves.

Steca TR 0603mc U technische Zeichnung


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 LC 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


  •  Steca TR 0603mc U productdatasheet DE · pdf · 0,955 MB
  •  Steca TR 0603mc U productdatasheet EN · pdf · 0.955 MB
  •  Steca TR 0603mc U manual EN · pdf · 5.289 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]
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