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  • 120/208/240V (Primary)<br>24V (Secondary), 40 VA Transformer, Foot-Mount Product Image
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    120/208/240V (Primary) 24V (Secondary), 40 VA Transformer, Foot-Mount 90-T40F3 120/208/240V (Primary) 24V (Secondary), 40 VA Transformer, Foot-Mount
    SKU: 90-T40F3 White Rodgers
    SKU: 90-T40F3
    Brand: White Rodgers
    (27)
    $10.27 each
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    1,231
    Wed, Jul 7
    1,231
    QtyArrives
    1,231 Wed, Jul 7
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  • Foot Mount 120/208/240V (Primary) 24V (Secondary) 40VA Transformer Product Image
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    Foot Mount 120/208/240V (Primary) 24V (Secondary) 40VA Transformer PF4031OEM Foot Mount 120/208/240V (Primary) 24V (Secondary) 40VA Transformer
    SKU: PF4031OEM Packard
    SKU: PF4031OEM
    Brand: Packard
    (3)
    $14.53 each
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    1,224
    Wed, Jul 7
    1,224
    QtyArrives
    1,224 Wed, Jul 7
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  • Foot Mount 120/208/240V (Primary) 24V (Secondary) 40VA Transformer Product Image
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    Foot Mount 120/208/240V (Primary) 24V (Secondary) 40VA Transformer PF42440 Foot Mount 120/208/240V (Primary) 24V (Secondary) 40VA Transformer
    SKU: PF42440 Packard
    SKU: PF42440
    Brand: Packard
    (6)
    $12.78 each
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    1,517
    Wed, Jul 7
    1,517
    QtyArrives
    1,517 Wed, Jul 7
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  • 120 VAC (Primary)<br>27V (Secondary)<br>40 VA Transformer Product Image
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    120 VAC (Primary) 27V (Secondary) 40 VA Transformer AT140A1000 120 VAC (Primary) 27V (Secondary) 40 VA Transformer
    SKU: AT140A1000 Resideo
    SKU: AT140A1000
    Brand: Resideo
    (15)
    $11.48 each
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    738
    Wed, Jul 7
    738
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    738 Wed, Jul 7
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  • Plate Mount Transformer (120 VAC To 24 VAC) Product Image
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    Plate Mount Transformer (120 VAC To 24 VAC) S84A-410 Plate Mount Transformer (120 VAC To 24 VAC)
    SKU: S84A-410 White Rodgers
    SKU: S84A-410
    Brand: White Rodgers
    (6)
    $19.10 each
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    166
    Wed, Jul 7
    166
    QtyArrives
    166 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • 120/208/240 VAC (Primary)<br>27V (Secondary)<br>40 VA Transformer Product Image
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    120/208/240 VAC (Primary) 27V (Secondary) 40 VA Transformer AT140A1018 120/208/240 VAC (Primary) 27V (Secondary) 40 VA Transformer
    SKU: AT140A1018 Resideo
    SKU: AT140A1018
    Brand: Resideo
    (4)
    $14.84 each
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    561
    Wed, Jul 7
    561
    QtyArrives
    561 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Transformer, 40VA, 60 Hz 120V Primary, 24V (Secondary), Foot Mount Product Image
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    Transformer, 40VA, 60 Hz 120V Primary, 24V (Secondary), Foot Mount 90-T40F1 Transformer, 40VA, 60 Hz 120V Primary, 24V (Secondary), Foot Mount
    SKU: 90-T40F1 White Rodgers
    SKU: 90-T40F1
    Brand: White Rodgers
    (17)
    $11.62 each
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    185
    Wed, Jul 7
    185
    QtyArrives
    185 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Class II Foot Mount 208/240V Input & 24V Output, 40VA Transformer Product Image
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    Class II Foot Mount 208/240V Input & 24V Output, 40VA Transformer PF40224 Class II Foot Mount 208/240V Input & 24V Output, 40VA Transformer
    SKU: PF40224 Packard
    SKU: PF40224
    Brand: Packard
    (6)
    $14.49 each
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    260
    Wed, Jul 7
    260
    QtyArrives
    260 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Multi Mount 120V (Primary) 24V (Secondary) 40VA Transformer Product Image
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    Multi Mount 120V (Primary) 24V (Secondary) 40VA Transformer PM12440 Multi Mount 120V (Primary) 24V (Secondary) 40VA Transformer
    SKU: PM12440 Packard
    SKU: PM12440
    Brand: Packard
    (6)
    $19.14 each
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    187
    Wed, Jul 7
    187
    QtyArrives
    187 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Multi Mount 120/208/240/480V (Pri.) 24V (Sec.) 75VA Transformer Product Image
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    Multi Mount 120/208/240/480V (Pri.) 24V (Sec.) 75VA Transformer PM7541MCB Multi Mount 120/208/240/480V (Pri.) 24V (Sec.) 75VA Transformer
    SKU: PM7541MCB Packard
    SKU: PM7541MCB
    Brand: Packard
    (3)
    $39.91 each
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    249
    Wed, Jul 7
    249
    QtyArrives
    249 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • 120V/208V/240V (Primary) 24V (Secondary), 40VA Transformer, Foot Mount Product Image
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    120V/208V/240V (Primary) 24V (Secondary), 40VA Transformer, Foot Mount TRAN-40VA 120V/208V/240V (Primary) 24V (Secondary), 40VA Transformer, Foot Mount
    SKU: TRAN-40VA Hartland Controls
    SKU: TRAN-40VA
    Brand: Hartland Controls
    $9.01 each
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    416
    Wed, Jul 7
    416
    QtyArrives
    416 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Foot Mount 120/208/240V (Primary) 24V (Secondary) 20VA Transformer Product Image
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    Foot Mount 120/208/240V (Primary) 24V (Secondary) 20VA Transformer PF42420 Foot Mount 120/208/240V (Primary) 24V (Secondary) 20VA Transformer
    SKU: PF42420 Packard
    SKU: PF42420
    Brand: Packard
    (2)
    $13.71 each
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    412
    Wed, Jul 7
    412
    QtyArrives
    412 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • 120 VAC (Primary)<br>26.5V (Secondary)<br>40 VA Transformer Product Image
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    120 VAC (Primary) 26.5V (Secondary) 40 VA Transformer AT72D1006 120 VAC (Primary) 26.5V (Secondary) 40 VA Transformer
    SKU: AT72D1006 Resideo
    SKU: AT72D1006
    Brand: Resideo
    (8)
    $23.03 each
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    216
    Wed, Jul 7
    216
    QtyArrives
    216 Wed, Jul 7
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  • 120V/208V/240V/480V (Primary) 24V (Secondary), 75VA Transformer, Foot Mount Product Image
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    120V/208V/240V/480V (Primary) 24V (Secondary), 75VA Transformer, Foot Mount TRAN-75VA 120V/208V/240V/480V (Primary) 24V (Secondary), 75VA Transformer, Foot Mount
    SKU: TRAN-75VA Hartland Controls
    SKU: TRAN-75VA
    Brand: Hartland Controls
    (1)
    $23.21 each
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    116
    Wed, Jul 7
    116
    QtyArrives
    116 Wed, Jul 7
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  • Foot Mount 120/208/240/480V 75VA Transformer Product Image
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    Foot Mount 120/208/240/480V 75VA Transformer PF52475 Foot Mount 120/208/240/480V 75VA Transformer
    SKU: PF52475 Packard
    SKU: PF52475
    Brand: Packard
    (3)
    $37.34 each
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    170
    Wed, Jul 7
    170
    QtyArrives
    170 Wed, Jul 7
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  • Plate or Panel Mounted 120/208/240 Vac Transformer w/ 9" Lead Wires & Metal End Bells Product Image
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    Plate or Panel Mounted 120/208/240 Vac Transformer w/ 9" Lead Wires & Metal End Bells AT150F1022 Plate or Panel Mounted 120/208/240 Vac Transformer w/ 9" Lead Wires & Metal End Bells
    SKU: AT150F1022 Resideo
    SKU: AT150F1022
    Brand: Resideo
    (2)
    $26.69 each
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    423
    Wed, Jul 7
    423
    QtyArrives
    423 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Transformer, Single Hub, Foot Mount, 75VA, 120 to 24 Vac Product Image
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    Transformer, Single Hub, Foot Mount, 75VA, 120 to 24 Vac TR75VA001 Transformer, Single Hub, Foot Mount, 75VA, 120 to 24 Vac
    SKU: TR75VA001 Functional Devices
    SKU: TR75VA001
    Brand: Functional Devices
    $22.25 each
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    147
    Wed, Jul 7
    147
    QtyArrives
    147 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Gas Ignition Transformer (120 VAC, 50/60 Hz) Product Image
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    Gas Ignition Transformer (120 VAC, 50/60 Hz) Q624A1014 Gas Ignition Transformer (120 VAC, 50/60 Hz)
    SKU: Q624A1014 Honeywell
    SKU: Q624A1014
    Brand: Honeywell
    (1)
    $132.99 each
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    230
    Wed, Jul 7
    230
    QtyArrives
    230 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • Universal Mount Transformer Product Image
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    Universal Mount Transformer AT140A1042 Universal Mount Transformer
    SKU: AT140A1042 Honeywell
    SKU: AT140A1042
    Brand: Honeywell
    (9)
    $24.19 each
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    60
    Wed, Jul 7
    60
    QtyArrives
    60 Wed, Jul 7
    Questions? Call 1-888-757-4774
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  • 120/208/240 VAC (Primary) 27.5V (Secondary)<br>75 VA Transformer Product Image
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    120/208/240 VAC (Primary) 27.5V (Secondary) 75 VA Transformer AT175A1008 120/208/240 VAC (Primary) 27.5V (Secondary) 75 VA Transformer
    SKU: AT175A1008 Resideo
    SKU: AT175A1008
    Brand: Resideo
    (10)
    $37.29 each
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    332
    Wed, Jul 7
    332
    QtyArrives
    332 Wed, Jul 7
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  • Gas Ignition Transformer<br>(120 VAC, 60 Hz) Product Image
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    Gas Ignition Transformer (120 VAC, 60 Hz) ET401A1 Gas Ignition Transformer (120 VAC, 60 Hz)
    SKU: ET401A1 Honeywell
    SKU: ET401A1
    Brand: Honeywell
    (2)
    $68.99 each
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    130
    Wed, Jul 7
    130
    QtyArrives
    130 Wed, Jul 7
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  • 120 VAC (Primary)<br>26.5V (Secondary)<br>40 VA Transformer Product Image
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    120 VAC (Primary) 26.5V (Secondary) 40 VA Transformer AT72D1683 120 VAC (Primary) 26.5V (Secondary) 40 VA Transformer
    SKU: AT72D1683 Resideo
    SKU: AT72D1683
    Brand: Resideo
    (8)
    $22.20 each
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    361
    Wed, Jul 7
    361
    QtyArrives
    361 Wed, Jul 7
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  • Transformer, Dual Hub, Foot Mount, 50VA, 480/277/240/120-24 Vac Product Image
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    Transformer, Dual Hub, Foot Mount, 50VA, 480/277/240/120-24 Vac TR50VA004 Transformer, Dual Hub, Foot Mount, 50VA, 480/277/240/120-24 Vac
    SKU: TR50VA004 Functional Devices
    SKU: TR50VA004
    Brand: Functional Devices
    $20.95 each
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    63
    Wed, Jul 7
    63
    QtyArrives
    63 Wed, Jul 7
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  • Transformer w/ Circuit Breaker,Single Hub, Foot Mount, 100VA, 120-24 Vac Product Image
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    Transformer w/ Circuit Breaker,Single Hub, Foot Mount, 100VA, 120-24 Vac TR100VA001 Transformer w/ Circuit Breaker,Single Hub, Foot Mount, 100VA, 120-24 Vac
    SKU: TR100VA001 Functional Devices
    SKU: TR100VA001
    Brand: Functional Devices
    $24.95 each
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    77
    Wed, Jul 7
    77
    QtyArrives
    77 Wed, Jul 7
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FAQs, Manuals & Videos

Resources

Articles

  • Transformers provide power to electric circuits in heating, cooling and HVAC systems. They can be used in any application that does not exceed the transformer's load ratings. Common applications include thermostats, gas valves, and relays. When selecting the appropriate transformer, primary voltage is the most important consideration. Transformers are available in primary voltages ranging from 24V to 480V. Honeywell and White Rodgers transformers are the industry standard.

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