120vac primary electrical transformers
![Veris X100CAA CONTROL TRANSFORMER | 100VA | 120-24VAC | CB | FT&SNGL HUB | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X100CAA_34e9928a-2483-4ee8-afe0-566149d8447e_medium.jpg?v=1688982380)
![Functional Devices TR100VA001 Transformer 100VA,120-24V,single hub,Class2 UL Listed US/Canada, Circ. Br. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR100VA001_medium.jpg?v=1709156867)
![Functional Devices TR40VA001 Transformer 40VA, 120-24V, single hub, Class 2 UL Listed US/Canada,Inherent Lim | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR40VA001_0e735e7c-bb0b-4bb8-a189-b8a2a533c6f9_medium.jpg?v=1709156818)
![Functional Devices TR50VA022US Transformer US Made 50VA 120/208/240/277/480-24V 2H Class 2 UL US/CA CB | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR50VA022US_426cb187-28fd-4dd1-8e71-111b7f366398_medium.jpg?v=1708365240)
![Functional Devices TR50VA008 Transformer 50VA, 208/240/277/480-120Vac, dual hub, 2.25A circuit breaker UL Lis | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR50VA008_medium.jpg?v=1709156867)
![Functional Devices TR20VA001 Transformer 20VA, 120-24V, single hub, Class 2, UL List., US/Can.,Inherent Lim. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR20VA001_e06aef5e-dd85-44a7-9a79-ec1c5abbee9b_medium.jpg?v=1708365236)
![Functional Devices TR300VA002 Transformer 300VA 120/208/240/480-24Vac UL Rec | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR300VA002_f70ac87f-12bc-4b40-8684-e883f9eb5fd8_medium.jpg?v=1709156818)
![Veris X050CBA CONTROL TRANSFORMER | 50VA | MLTTP-24VAC | CB | Ft & Sngl Hub | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X050CBA_61f7573e-1d22-402e-be87-475a66938572_medium.jpg?v=1688982398)
![Functional Devices TR150VA001 Transformer 150VA, 120-24V, single hub, UL List US/Canada, Circ. Bkr. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR150VA001_medium.jpg?v=1709156867)
![Veris X100CAB CONTROL TRANSFORMER | 100VA | 120-24VAC | CB | FT&DUAL HUB | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X100CAB_18cbc860-cdcc-4d20-a3c3-d9c71cb4e94c_medium.jpg?v=1689243600)
![Veris X050CAA CONTROL TRANSFORMER | 50VA | 120-24 VAC | CB | FT & Sngl Hub | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X050CAA_8730297b-91c5-49cc-ad78-75c82561e6e9_medium.jpg?v=1688982286)
![Veris X040AAA CONTROL TRANSFORMER | 40VA | 120-24VAC | FT&SINGLE HUB MNT | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X020AAA_medium.jpg?v=1688981553)
![Functional Devices TR100VA002 Transformer 100VA, 120-24V, dual hub, Class2 UL Listed US/Canada, Circ. Bkr. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR100VA002_e60f7348-a7c6-45bb-8b32-fb881cf07164_medium.jpg?v=1708365209)
![Functional Devices TR100VA015 Transformer 100VA,120/208/240/277/480-24V, SH,Class2 UL List US/Canada.,Cir.Br | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR100VA015_f32c06fd-844b-4f17-ab08-0819ab2d153c_medium.jpg?v=1708365240)
![Veris X020AAA CONTROL TRANSFORMER | 20VA | 120-24VAC | FT&SINGLE HUB MNT | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X020AAA_d7f91c40-daba-4d5c-a10b-52c977b05f0b_medium.jpg?v=1688982329)
![Functional Devices TR50VA001 Transformer 50VA, 120-24V, single hub, Class 2 UL Listed US/Canada,3A Fuse | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR50VA001_db20ecea-2341-416f-980f-37ff44e8091d_medium.jpg?v=1708365229)
![KMC XEE-6311-075 Transformer; MULTI TAP TO 24VAC 75VA | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/XEE-6311-100-medium_39492734-2930-4b88-b829-aa33fca0ce1a_medium.jpg?v=1712852941)
![Veris X100CBB CONTROL TRANSFORMER | 100VA | 120/240/277/480-24VAC | CB | FT&DL HUB | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X100CBB_411dc7f1-e29c-4352-995d-48842fe95d6c_medium.jpg?v=1689243605)
![Veris X075CHA XFmr | 75VA | MLT TP-24VAC | CB | Ft | Sngl Hub | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/X075CHA_medium.jpg?v=1706643288)
![Functional Devices TR75VA004 Transformer 75VA, 120/208/240/480-24V,2 hub 1TH+1S0,Class 2 UL US & CA,Cir.Bkr | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR75VA004_61578063-4b86-4f3a-aef9-872034bf140a_medium.jpg?v=1708365241)
![Functional Devices TR50VA016 Transformer 50VA,240/208/120-24V,Single Hub,Class2 UL List US/CAw/CB | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR50VA016_2b0ec77b-0cbf-48bf-84f4-178c88a99ec0_medium.jpg?v=1708365252)
![Functional Devices TR50VA004 Transformer 50VA,480/277/240/120-24V,dual hub,Class2 UL List US/Canada,Cir.Bkr. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR50VA004_2b7b32ce-680b-43e1-ba52-578866c04bfd_medium.jpg?v=1708365232)
![Functional Devices TR150VA002 Transformer 150VA, 120-24V, dual hub, UL Listed US/Canada, Circ. Bkr. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR150VA002_medium.jpg?v=1699657472)
![Functional Devices TR100VA004 Transformer 100VA,120/240/277/480-24V,dual hub,Class2 UL List US/Canada.,Cir.Br | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TR100VA004_8ad05ccb-fb9f-49ab-8b05-2f9cdf0b5370_medium.jpg?v=1708365232)
Choose from over 96 different 120VAC primary electrical transformers to ensure your next project goes smoothly.
If you want to keep the transfer of energy in your circuits safe throughout your home, office, or building then you need a stable electrical transformer.
Our 120 VAC transformers protect your HVAC systems and building automation applications from up to 120 volts of alternating current.
To ensure you get the best protection for your HVAC systems, we work with quality manufacturers such as ACI, Functional Devices, KMC, and Veris.
The products we use come from around the world. If you need a product made here in the United States, check out some of our Functional Devices transformers.
Furthermore, 62 of our devices include a circuit breaker inside the transformer for additional protections.
Additionally, 44 transformers can be mounted on a dual hub, while 47 devices thread around a single hub. If you do not want to use the threaded hub to mount the transformer, you can use the base pad.
VA ratings for electrical transformers range between 20 to 375 volt-amperes.
Here are some other features to consider when purchasing a Blackhawk Supply primary electrical transformer.
Primary
- 120V
- 208V
- 240V
- 277V
- 280V
- 480V
Secondary
- 120V
- 12V
- 16V
- 24V
- 32V
Can we help you choose the best primary electrical transformer for your needs?
If you need an electrical transformer for your next project, then you came to the right place. With 96 options you can find one that works for you. If you have trouble finding the best transformer for your needs, let us know how Blackhawk Supply can help you.
Contact our team today, so we can help you pick the best primary electrical transformer for your home, office, or building.
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