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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
    Brand: White Rodgers
    (23)
    $9.99 each
    374
    Tue, Apr 14
    374
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    374 Tue, Apr 14
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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
    Brand: Honeywell
    (14)
    $12.49 each
    734
    Tue, Apr 14
    734
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    734 Tue, Apr 14
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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
    Brand: Packard
    (1)
    $8.79 each
    103
    Tue, Apr 14
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    103 Tue, Apr 14
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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
    Brand: White Rodgers
    (5)
    $18.99 each
    108
    Tue, Apr 14
    108
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    108 Tue, Apr 14
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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
    Brand: Packard
    (2)
    $8.99 each
    155
    Tue, Apr 14
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    155 Tue, Apr 14
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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
    Brand: White Rodgers
    (16)
    $10.49 each
    87
    Tue, Apr 14
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    87 Tue, Apr 14
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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
    Brand: Packard
    (2)
    $11.49 each
    100
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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
    Brand: Packard
    (3)
    $27.79 each
    64
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    64 Tue, Apr 14
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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
    Brand: Honeywell
    (3)
    $13.79 each
    255
    Tue, Apr 14
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    255 Tue, Apr 14
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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
    Brand: Honeywell
    (2)
    $29.29 each
    316
    Tue, Apr 14
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    316 Tue, Apr 14
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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
    Brand: Packard
    (1)
    $8.29 each
    248
    Tue, Apr 14
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    248 Tue, Apr 14
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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
    Brand: Packard
    (3)
    $26.79 each
    46
    Tue, Apr 14
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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
    Brand: Packard
    (3)
    $9.69 each
    39
    Tue, Apr 14
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    39 Tue, Apr 14
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  • Multi Mount 120/208-240V (Primary) 24V (Secondary) 50VA Transformer Product Image
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    Multi Mount 120/208-240V (Primary) 24V (Secondary) 50VA Transformer PM44450 Multi Mount 120/208-240V (Primary) 24V (Secondary) 50VA Transformer
    SKU: PM44450
    Brand: Packard
    (2)
    $15.99 each
    26
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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
    Brand: Honeywell
    (8)
    $25.69 each
    86
    Tue, Apr 14
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    86 Tue, Apr 14
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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
    Brand: Honeywell
    (1)
    $129.99 each
    258
    Tue, Apr 14
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    258 Tue, Apr 14
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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 AT175F1023 120/208/240 VAC (Primary) 27.5V (Secondary) 75 VA Transformer
    SKU: AT175F1023
    Brand: Honeywell
    (5)
    $36.59 each
    144
    Tue, Apr 14
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    144 Tue, Apr 14
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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
    Brand: Functional Devices
    $22.25 each
    69
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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
    Brand: Honeywell
    (8)
    $24.19 each
    263
    Tue, Apr 14
    263
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    263 Tue, Apr 14
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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
    Brand: Honeywell
    (9)
    $32.99 each
    270
    Tue, Apr 14
    270
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    270 Tue, Apr 14
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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
    Brand: Hartland Controls
    $21.75 each
    114
    Tue, Apr 14
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    114 Tue, Apr 14
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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
    Brand: Hartland Controls
    $8.45 each
    145
    Tue, Apr 14
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    145 Tue, Apr 14
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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
    Brand: Functional Devices
    $24.95 each
    67
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    67 Tue, Apr 14
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  • Transformer, Foot & Single Threaded Hub Mount, 50VA, 120 to 24 Vac Product Image
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    Transformer, Foot & Single Threaded Hub Mount, 50VA, 120 to 24 Vac TR50VA001 Transformer, Foot & Single Threaded Hub Mount, 50VA, 120 to 24 Vac
    SKU: TR50VA001
    Brand: Functional Devices
    (1)
    $12.95 each
    61
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    61 Tue, Apr 14
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FAQs, Manuals & Videos

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  • 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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