Transformer Selection Chart

Voltage Transformers

40 VA TransformerTransformers help you to adapt supplied voltages to usable power levels. In control systems, transformers are used to adapt supply voltages to match the needs of the devices employed, and to provide isolation of circuits.

Select the voltage amps that reflect the anticipated load on the circuit, then, select the correct primary and secondary voltage for your application. As always, if you need help selecting the correct transformer for your application calls us at 800-227-9800. We are here to help you.

Control Transformer Selection Chart

For your convenience, we have gathered a variety of sizes and voltages to power your control systems into one selection chart arranged by power capacity (VA ratings). Some larger models have to be ordered. Please ask.

Part # VA Desc Hubs. Fuse Price  
TR100VA001 100 120-24 1 Circuit Breaker $47.06 Add to Order
TR100VA002 100 120-24 2 Circuit Breaker $48.14 Add to Order
TR100VA004 100 480/277/240/120-24 2 Circuit Breaker $56.60 Add to Order
TR150VA001 150 120-24 1 Circuit Breaker $63.66 Add to Order
TR175VA001 175 240/208-24 2-bottom — $77.80 Add to Order
TR175VA002 175 120-24 2 — $82.80 Add to Order
TR240VA001 240 120-24 1-si — $94.86 Add to Order
TR300VA002 300 480/240/208/120-24 2-end bell Circuit Breaker $138.09 Add to Order
TR375VA001 375 120-24 2-bottom — $130.17 Add to Order
TR40VA001 40 120-24 1 — $22.54 Add to Order
TR40VA002 40 120-24 2 — $23.17 Add to Order
TR40VA004 40 277/240/208/120-24 2 — $27.06 Add to Order
TR40VA015 40 240/208/120-24 1 — $26.66 Add to Order
TR50VA001 50 120-24 1 3A $24.49 Add to Order
TR50VA002 50 120-24 2 3A $25.17 Add to Order
TR50VA003 50 208/120-24 2 3A $26.26 Add to Order
TR50VA004 50 480/277/240/208/120-24 2 Circuit Breaker $40.80 Add to Order
TR50VA005 50 120-24 1 Circuit Breaker $34.97 Add to Order
TR50VA014 50 277-24 1 Circuit Breaker $35.97 Add to Order
TR50VA015 50 480/277/240/208/120-24 1 Circuit Breaker $40.49 Add to Order
TR50VA018 50 480/277/240/208-120 1-pla — $44.09 Add to Order
TR75VA001 75 120-24 1 Circuit Breaker $42.49 Add to Order
TR75VA002 75 120-24 2 Circuit Breaker $43.71 Add to Order
TR75VA003 75 277-24 1 Circuit Breaker $43.83 Add to Order
TR75VA005 75 480/240/208/120-24 1 Circuit Breaker $48.34 Add to Order
TR85VA002 85 120-24 1 — [Contact us for a price or a substitute]

PLANNING TO UPGRADE TO AUTOMATION?

NECC has the finest technical support to help you easily migrate to Digital (DDC) controls. We can help you with your project with engineering, wiring diagrams and panel fabrication.
–or–
If you need onsite help, we can come out and do a survey for you or recommend a local authorized contractor. Together, we can do it. Let us know how we can help you.


Johnon Controls Tamper-Resistant 24V Transformers

The Y65 Series Transformers have a 1/2'' threaded mount on one side. All the low and line volt wiring goes through the mounting spud. The AE-207-120 is a 4'' x 4'' plate mount version. No exposed screw terminals to be messed with!

Part # Power VA Mount Price  
AE-207-120 120Vac 20 4" x 4" Plate [Contact us for a price or a substitute]
Y65T42-0 120/208/240Vac 40 1/2" Spud $76.63 Add to Order

Emergency Plug-In Transformer

Instant 24V For Emergency or Testing!

Always have a 24V source available. Keep one of these handy dudes in your toolbox. Better yet, connect about 12 to 18'' of stranded wire to it and crimp some alligator clips on the business end.

  • Power: 120 Vac
  • VA: 50
  • Mount: Multi-mount

Part # Universal Signal Generator Price  
620-202 120V Plug-in Transformer $37.35 Add to Order

Honeywell Universal Replacement Transformer

This One Has It All!

It costs a coupla bucks more, but when you’re stuck, you’ll be really glad you have one handy. Multivolt and Multimount—foot, 2''x2'', 3''x3'', 2''x4'', plate surface, panel or knockout mounting.

Part # Power /Vac VA Mount Price  
AT87A1106 120/208/240 50 Multi-mount $80.22 Add to Order

Transformers With Built-In Circuit Breakers

They cost a little more, but way cheaper than the labor of replacing a burned-out one.

Part # Power/VAC VA Mount Price  
PNT100R 120/208/ 240/481 100 Foot [Contact us for a price or a substitute]
PNT60R 120/208/240 60 Foot [Contact us for a price or a substitute]
PNT75R 120/208/ 240/480 75 Foot $31.09 Add to Order