Buck Boost Transformer
Buck-boost transformers shift line voltage up or down by a narrow margin, typically five to twenty percent, bringing a supply into the range the equipment was built for. Electricians drop one in when a 208-volt supply has to feed 230-volt equipment, when a long run has sagged the voltage at the far end of a line, or when replacing a whole transformer costs far more than correcting a few percent.
As an authorized electrical distributor for multiple manufacturers, we stock buck-boost transformers from Acme Electric, Hammond Power Solutions, ABB and more across competing lines, in single and three-phase with a range of enclosure types and frequency ratings, so you can match the voltage shift the load needs, compare enclosure ratings and dimensions across brands, and mount one in the space the panel has. Same-day shipping on in-stock items ordered before 2pm local time.
86 items
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$238.70 / EA
Typical price:$292.00 / EA
SKU #:2259787
Part Number #:QC20ERCB
$240.33 / EA
Typical price:$294.00 / EA
SKU #:2411611
Part Number #:QC25DTCB
$272.22 / EA
Typical price:$333.00 / EA
SKU #:2193964
Part Number #:QC25ESCB
$272.22 / EA
Typical price:$333.00 / EA
SKU #:2287902
Part Number #:QC50DTCB
SKU #:2288410
Part Number #:QC50ESCB
$321.27 / EA
Typical price:$393.00 / EA
SKU #:353091
Part Number #:B100MBT13RK
Dimensions: 3-13/16 in H x 3-3/8 in W x 4-1/4 in D
$120.00 / EA
Typical price:$168.00 / EA
SKU #:346888
Part Number #:B100MBT713XK
$102.14 / EA
Typical price:$143.00 / EA
SKU #:1027822
Part Number #:B100WZ13XK
$170.71 / EA
Typical price:$239.00 / EA
SKU #:2457858
Part Number #:1BB1224J
Dimensions: 10.19 in L x 5.06 in W x 4.59 in H
Insulation: Yes
Maximum Amperage Rating: 91.66 A for 1 ph/87.5 A for 3 ph
SKU #:2457857
Part Number #:205BB1632J
Maximum Amperage Rating: 17.71 A for 1 ph/16.67 A for 3 ph
Series: J Series Warehouse Stock
SKU #:2281449
Part Number #:HS19B100
Maximum Amperage Rating: 0.417/0.208 A Primary, 0.833/0.417 A Secondary
Series: HS19
Type: Non-Encapsulated
$115.53 / EA
Typical price:$270.35 / EA
SKU #:2259784
Part Number #:HS19B150
Dimensions: 9 in L x 14 in W x 17 in H
Maximum Amperage Rating: 45.5/22.7 A
Series: HS19
$137.99 / EA
Typical price:$322.89 / EA
SKU #:2259786
Part Number #:HS19B250
Dimensions: 4 in L x 4 in W x 8 in H
Maximum Amperage Rating: 1.04/0.512 A Primary, 2.08/1.04 A Secondary
Series: HS19
$155.68 / EA
Typical price:$364.29 / EA
SKU #:2281171
Part Number #:HS19B50
Maximum Amperage Rating: 0.208/0.104 A Primary, 0.416/0.208 A Secondary
Series: HS19
Type: Non-Encapsulated
$99.49 / EA
Typical price:$232.80 / EA
SKU #:2158903
Part Number #:HS19F15A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 125/62.5 A Secondary
Series: HS19
$388.04 / EA
Typical price:$908.01 / EA
SKU #:2243512
Part Number #:HS19F1B
Dimensions: 6 in L x 5 in W x 10 in H
Maximum Amperage Rating: 4.5/2.3 A
Series: HS19
$313.72 / EA
Typical price:$734.10 / EA
SKU #:2258388
Part Number #:HS19F500B
Maximum Amperage Rating: 0.833 A
Series: HS19
$259.15 / EA
Typical price:$606.41 / EA
SKU #:2191600
Part Number #:HS19F750B
Maximum Amperage Rating: 3.13/1.56 A Primary, 6.25/3.13 A Secondary
Series: HS19
$247.72 / EA
Typical price:$591.49 / EA
SKU #:2358432
Part Number #:HS20B250
Dimensions: 4 in L x 4 in W x 7-1/2 in H
Maximum Amperage Rating: 20.8/10.4 A Secondary
Series: HS20
$314.49 / EA
Typical price:$735.92 / EA
SKU #:1648590
Part Number #:HS20F15A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 93.7/46.8 A Secondary
Series: HS20
$392.52 / EA
Typical price:$918.49 / EA
SKU #:2345023
Part Number #:HS20F1B
Maximum Amperage Rating: 83.3/41.6 A Secondary
Series: HS20
$319.66 / EA
Typical price:$747.99 / EA
SKU #:2209773
Part Number #:HS20F500B
Maximum Amperage Rating: 41.6/20.8 A Secondary
Series: HS20
$197.76 / EA
Typical price:$462.76 / EA
SKU #:2258389
Part Number #:HS20F750B
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS20
$252.77 / EA
Typical price:$591.49 / EA
SKU #:2236093
Part Number #:HS22B250
Dimensions: 4 in L x 4 in W x 8 in H
Maximum Amperage Rating: 15.6/7.81 A Secondary
Series: HS22
$264.22 / EA
Typical price:$618.28 / EA
SKU #:2178944
Part Number #:HS22F15A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS22
$444.55 / EA
Typical price:$1040.25 / EA
SKU #:235988
Part Number #:HS22F1B
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS22
$392.52 / EA
Typical price:$918.49 / EA
SKU #:2187126
Part Number #:HS22F2A
Dimensions: 9 in L x 14 in W x 12 in H
Maximum Amperage Rating: 27.1 A
Series: HS22
$606.59 / EA
Typical price:$1419.43 / EA
SKU #:2194113
Part Number #:HS22F3A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS22
$820.69 / EA
Typical price:$1920.41 / EA
SKU #:1651964
Part Number #:HS22F500B
Maximum Amperage Rating: 31.2/15.6 A Secondary
Series: HS22
$250.88 / EA
Typical price:$587.07 / EA
SKU #:2246141
Part Number #:HS22F5A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 83.3/41.6 A Secondary
Series: HS22
$1225.08 / EA
Typical price:$2866.70 / EA
SKU #:2235798
Part Number #:HS22F750B
Maximum Amperage Rating: 46.8/23.4 A Secondary
Series: HS22
$313.72 / EA
Typical price:$734.10 / EA
$238.70 / EA
Typical price:$292.00 / EA
SKU #:2259787
Part Number #:QC20ERCB
$240.33 / EA
Typical price:$294.00 / EA
SKU #:2411611
Part Number #:QC25DTCB
$272.22 / EA
Typical price:$333.00 / EA
SKU #:2193964
Part Number #:QC25ESCB
$272.22 / EA
Typical price:$333.00 / EA
SKU #:2287902
Part Number #:QC50DTCB
SKU #:2288410
Part Number #:QC50ESCB
$321.27 / EA
Typical price:$393.00 / EA
SKU #:353091
Part Number #:B100MBT13RK
Dimensions: 3-13/16 in H x 3-3/8 in W x 4-1/4 in D
$120.00 / EA
Typical price:$168.00 / EA
SKU #:346888
Part Number #:B100MBT713XK
$102.14 / EA
Typical price:$143.00 / EA
SKU #:1027822
Part Number #:B100WZ13XK
$170.71 / EA
Typical price:$239.00 / EA
SKU #:2457858
Part Number #:1BB1224J
Dimensions: 10.19 in L x 5.06 in W x 4.59 in H
Insulation: Yes
Maximum Amperage Rating: 91.66 A for 1 ph/87.5 A for 3 ph
SKU #:2457857
Part Number #:205BB1632J
Maximum Amperage Rating: 17.71 A for 1 ph/16.67 A for 3 ph
Series: J Series Warehouse Stock
SKU #:2281449
Part Number #:HS19B100
Maximum Amperage Rating: 0.417/0.208 A Primary, 0.833/0.417 A Secondary
Series: HS19
Type: Non-Encapsulated
$115.53 / EA
Typical price:$270.35 / EA
SKU #:2259784
Part Number #:HS19B150
Dimensions: 9 in L x 14 in W x 17 in H
Maximum Amperage Rating: 45.5/22.7 A
Series: HS19
$137.99 / EA
Typical price:$322.89 / EA
SKU #:2259786
Part Number #:HS19B250
Dimensions: 4 in L x 4 in W x 8 in H
Maximum Amperage Rating: 1.04/0.512 A Primary, 2.08/1.04 A Secondary
Series: HS19
$155.68 / EA
Typical price:$364.29 / EA
SKU #:2281171
Part Number #:HS19B50
Maximum Amperage Rating: 0.208/0.104 A Primary, 0.416/0.208 A Secondary
Series: HS19
Type: Non-Encapsulated
$99.49 / EA
Typical price:$232.80 / EA
SKU #:2158903
Part Number #:HS19F15A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 125/62.5 A Secondary
Series: HS19
$388.04 / EA
Typical price:$908.01 / EA
SKU #:2243512
Part Number #:HS19F1B
Dimensions: 6 in L x 5 in W x 10 in H
Maximum Amperage Rating: 4.5/2.3 A
Series: HS19
$313.72 / EA
Typical price:$734.10 / EA
SKU #:2258388
Part Number #:HS19F500B
Maximum Amperage Rating: 0.833 A
Series: HS19
$259.15 / EA
Typical price:$606.41 / EA
SKU #:2191600
Part Number #:HS19F750B
Maximum Amperage Rating: 3.13/1.56 A Primary, 6.25/3.13 A Secondary
Series: HS19
$247.72 / EA
Typical price:$591.49 / EA
SKU #:2358432
Part Number #:HS20B250
Dimensions: 4 in L x 4 in W x 7-1/2 in H
Maximum Amperage Rating: 20.8/10.4 A Secondary
Series: HS20
$314.49 / EA
Typical price:$735.92 / EA
SKU #:1648590
Part Number #:HS20F15A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 93.7/46.8 A Secondary
Series: HS20
$392.52 / EA
Typical price:$918.49 / EA
SKU #:2345023
Part Number #:HS20F1B
Maximum Amperage Rating: 83.3/41.6 A Secondary
Series: HS20
$319.66 / EA
Typical price:$747.99 / EA
SKU #:2209773
Part Number #:HS20F500B
Maximum Amperage Rating: 41.6/20.8 A Secondary
Series: HS20
$197.76 / EA
Typical price:$462.76 / EA
SKU #:2258389
Part Number #:HS20F750B
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS20
$252.77 / EA
Typical price:$591.49 / EA
SKU #:2236093
Part Number #:HS22B250
Dimensions: 4 in L x 4 in W x 8 in H
Maximum Amperage Rating: 15.6/7.81 A Secondary
Series: HS22
$264.22 / EA
Typical price:$618.28 / EA
SKU #:2178944
Part Number #:HS22F15A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS22
$444.55 / EA
Typical price:$1040.25 / EA
SKU #:235988
Part Number #:HS22F1B
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS22
$392.52 / EA
Typical price:$918.49 / EA
SKU #:2187126
Part Number #:HS22F2A
Dimensions: 9 in L x 14 in W x 12 in H
Maximum Amperage Rating: 27.1 A
Series: HS22
$606.59 / EA
Typical price:$1419.43 / EA
SKU #:2194113
Part Number #:HS22F3A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 62.5/31.2 A Secondary
Series: HS22
$820.69 / EA
Typical price:$1920.41 / EA
SKU #:1651964
Part Number #:HS22F500B
Maximum Amperage Rating: 31.2/15.6 A Secondary
Series: HS22
$250.88 / EA
Typical price:$587.07 / EA
SKU #:2246141
Part Number #:HS22F5A
Dimensions: 7 in L x 10 in W x 12 in H
Maximum Amperage Rating: 83.3/41.6 A Secondary
Series: HS22
$1225.08 / EA
Typical price:$2866.70 / EA
SKU #:2235798
Part Number #:HS22F750B
Maximum Amperage Rating: 46.8/23.4 A Secondary
Series: HS22
$313.72 / EA
Typical price:$734.10 / EA










