Power Supplies

RIB TR Series

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RIB TR Series

Functional Devices Control Transformers RIB TR Series

Functional Devices Control Transformers


The RIB TR Series offers a complete line of control transformers for use in building automation and temperature control systems. The series includes transformer VA ratings from 20 VA up through 375 VA and primary voltages of 120, 208, 240, 277, and 480 VAC. Isolation transformers for 24 VAC circuits are also included. All RIB TR Series transformers are UL listed and feature split-bobbin construction. Some also have a secondary circuit breaker.


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QtyModelDescriptionIn StockList PriceInternet Price
TR100VA001 TRANSFORMER 120:24 VAC 100 VA INFO63.6350.90
TR100VA002 TRANSFORMER 120:24 VAC 100VA In Stock61.6849.34
TR100VA002-20 XFMR 100VA,120-24V,2 HUB, INFO58.5846.86
TR100VA004 XFMR 120/277/240/480:24VAC 100 In Stock70.3556.28
TR100VA005 TRANSFORMER 120/240/277-24VAC 100VA In Stock79.7963.83
TR100VA008 TRANSFORMER 208/240/277-120VAC 100VA In Stock81.8165.45
TR100VA015 TRFMR 100VA; 120/208/240/277/480-24V CIRCUIT BRKER In Stock77.6962.15
TR150VA001 TRANSFORMER 120:24 VAC 150 VA In Stock85.8568.68
TR150VA002 TRANSFORMER 120:24 150VA 2 THREADED HUBS In Stock99.9979.99
TR150VA008 XFMR 480/277/240/208 120VAC 150VA; 2 THREADED HUBS In Stock90.9072.72
TR175VA001 XFMR 208/240:24 VAC 175 VA In Stock104.0383.22
TR175VA002 TRANSFORMER 120:24 VAC 175 VA In Stock91.9173.53
TR175VA003 XFMR 175VA, 120-24V, SNGL HUB, UL LISTED US/CANADA INFO78.7863.02
TR20VA001 TRANSFORMER 120:24 VAC 20 VA In Stock23.2318.58
TR20VA002 TRANSFORMER, 208:24VAC, 20VA In Stock23.2318.58
TR20VA003 TRANSFORMER 24:24 VAC 20 VA In Stock24.2419.39
TR20VA004 20VA, 277/240/208/120-24V,2 HUB, INHERENT LIMIT In Stock31.3125.05
TR20VA007 TRANSFORMER 277:24 VAC 20 VA In Stock23.2318.58
TR240VA001 TRANSFORMER 120:24 VAC 240 VA In Stock116.6593.32
TR300VA002 TRANSFORMER, 120/208/240/480:24VAC, 300VA In Stock147.27117.82
TR375VA001 TRANSFORMER 120:24 VAC 375 VA In Stock137.39109.91
TR40VA001 TRANSFORMER 120:24 VAC 40 VA In Stock26.2320.98
TR40VA002 TRANSFORMER 120:24 VAC 40 VA In Stock28.2822.62
TR40VA003 TRANSFORMER 24:24 VAC 40 VA In Stock31.3125.05
TR40VA004 TRANSFORMER, 120/208/240/277:24VAC, 40VA In Stock29.0723.26
TR40VA013 XFMR 40VA, 208/240/277/480-120VAC, In Stock46.4637.17
TR40VA015 TRANSFORMER, 120/208/240:24VAC, 40VA In Stock30.3124.25
TR40VA022 XFMR 40VA, 120-24V INFO22.7118.17
TR40VA040 TRANSFORMER, 120/208/240:24VAC, 40VA, SEC TERMS In Stock30.3524.28
TR50VA001 TRANSFORMER 120:24 VAC 50 VA In Stock33.3326.66
TR50VA002 TRANSFORMER 120:24 VAC 50 VA In Stock35.3528.28
TR50VA003 TRANSFORMER 208/240:24VAC 50VA In Stock34.3427.47
TR50VA004 XFMR 480/277/240/120:24VAC 50V In Stock50.0340.02
TR50VA005 TRANSFORMER 120:24 VAC 50 VA In Stock39.9631.97
TR50VA006 TRANSFORMER 277:24 VAC 50VA In Stock44.4435.55
TR50VA007 TRANSFORMER 277:24 VAC 50 VA INFO46.4637.17
TR50VA009 TRANSFORMER 120/208/240:24VAC, 50VA, CLASS 2 In Stock47.2337.79
TR50VA014 TRANSFORMER, 277:24VAC, 50VA, CLASS 2 In Stock42.7934.23
TR50VA015 XFMR, 120/208/240/277/480:24VAC, 50VA, CLASS 2 In Stock50.7340.59
TR50VA016 TRANSFORMER, 120/208/240:24VAC, 50VA, CLASS 2 In Stock47.4837.98
TR50VA017 TRANSFORMER, 208/277/480:24VAC, 50VA, CLASS 2 In Stock51.5141.21
TR50VA018 XFMR 50VA,480/277/240/208-120V INFO46.4637.17
TR50VA019 XFRMR 50VA,277/120V-24,PLAST ENDBELLS INFO29.2923.43
TR75VA001 TRANSFORMER 120:24 VAC 75 VA In Stock54.8843.91
TR75VA002 TRANSFORMER 120:24 VAC 75 VA In Stock61.6149.29
TR75VA003 TRANSFORMER, 277:24VAC, 75VA, CLASS 2 In Stock63.6350.90
TR75VA004 XFMR 120/208/240/480:24VAC 75V In Stock65.6552.52
TR75VA005 TRANSFORMER 120/208/240/480:24VAC, 75VA, CLASS 2 In Stock60.7948.63
TR75VA007 XFMR 75VA, 120/208/240/480-24V In Stock58.5846.86


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  • Complete line of control transformers from 20 VA to 375 VA
  • Foot and hub mounting on most models
  • All models UL listed, many are Class 2 rated
  • Ambient temp -30° to 140℉ (0° to 60℃)
  • Color-coded wire leads
  • One year warranty

Secondary Voltage:24 VAC

Approvals:Class 2 UL1585 listed US/Canada, E197146