Isolation Transformers

The Foster Transformer Company manufactures a wide range of single phase and three phase isolation transformers with kVA ratings from 0.025 kVA through 25 kVA.

Our most popular series of Isolation Transformers is available with capacities of 0.025 kVA through 5.0 kVA and primary voltage ratings of 120 V, 208 V, and 240 V or 208 V, 240 V, and 480 V. Secondary voltage ratings of 120 V, 208 V, or 240 V are available. Transformers are UL Listed to UL 5085-1 and 5085-2 (formerly UL 506) and CSA Certified to CSA C22.2 No. 66.1 and CSA C22.2 No. 66.2 (formerly CSA C22.2 No. 66).

With minimum full load efficiencies of 97% and a thin profile, our Ultra-High Efficiency Isolation transformers are ideal for use in confined spaces or flush mounted panels. Available primary voltages of 120 V, 208 V, 240 V, 277 V, 347 V, 415 V, 480 V, or 600 V may be paired with secondary voltages of 120 V, 208 V, 240 V, or 277 V. All models are UL Recognized to UL 5085-1 and 5085-2 (formerly UL 506) and CSA Component Certified to CSA C22.2 No. 66.1 and CSA C22.2 No. 66.2 (formerly CSA C22.2 No. 66). With capacities ranging from 1.0 kVA through 25.0 kVA, we’re sure to have the voltage and rating you need.

ModelInputFrequencyOutputCapacityABCDEFGHI
15342460V50/60Hz24V75VA3 9/1642 8/162 9/16 3/16    
15347115/(200)/230V50/60Hz24V75VA3 9/1642 12/162 9/16 3/16    
15348115V50/60Hz24V75VA3 9/1642 8/162 9/16 3/16    
15349200/230V50/60Hz24V75VA3 9/1642 12/162 9/16 3/16    
15349-02220/230/240V50/60Hz26.5V75VA3 9/1642 12/162 9/16 3/16    
15696115V50/60Hz24V100VA2 8/1632 12/162 13/1613/6410/16   
15697115/(200)/230V50/60Hz24V100VA2 8/1632 12/162 13/1613/6410/16   
15698200/230V50/60Hz24V100VA2 8/1632 12/162 13/1613/6410/16   
1574020/240/480 V50/60Hz120/240V0.025kVA2 11/16 2 1/4 132 3/16 22 5/8 13/64 3/8
1574120/240/480V50/60Hz120/240V0.050kVA3 1/16 2 9/16 132 1/2 22 5/8 13/64 3/8
1574220/240/480V50/60Hz120/240V0.075kVA3 1/16 2 9/16 1 1/2 3 1/2 2 1/2 2 1/2 3 1/8 13/64 3/8
1574320/240/480V50/60Hz120/240V0.100kVA3 7/16 2 7/8 1 3/8 3 3/8 2 13/16 2 3/8 3 13/64 3/8
1574420/240/480V50/60Hz120/240V0.150kVA3 13/16 3 3/16 1 7/8 4 1/8 3 1/8 2 7/8 3 1/2 13/64 3/8
1574520/240/480V50/60Hz120/240V0.175kVA3 13/16 3 3/16 1 7/8 4 1/8 3 1/8 2 7/8 3 1/2 13/64 3/8
1574620/240/480V50/60Hz120/240V0.200kVA4 9/16 3 13/16 1 3/8 4 3/8 3 3/4 2 3/8 3 13/64 3/8
1574720/240/480V50/60Hz120/240V0.250kVA4 9/16 3 13/16 1 7/8 4 7/8 3 3/4 2 7/8 3 1/2 13/64 3/8
1574820/240/480V50/60Hz120/240V0.350kVA4 9/16 3 13/16 2 3/4 5 3/4 3 3/4 3 7/8 5 1/8 9/32 9/16
1574920/240/480V50/60Hz120/240V0.500kVA5 5/16 4 7/16 2 3/4 64 3/8 3 7/8 5 1/8 9/32 9/16
1575020/240/480V50/60Hz120/240V0.750kVA5 5/16 4 7/16 47 1/4 4 3/8 5 1/8 6 3/8 9/32 9/16
1575120/240/480V50/60Hz120/240V1.000kVA6 1/2 5 7/16 36 5/8 5 5/16 4 1/2 5 7/8 5/16 11/16
1575220/240/480V50/60Hz120/240V1.500kVA7 3/16 6 3/16 3 3/8 7 1/2 5 13/16 4 7/8 6 1/4 5/16 11/16
1575320/240/480V50/60Hz120/240V2.000kVA7 3/16 6 3/16 4 1/4 8 3/8 5 13/16 5 3/4 7 1/8 5/16 11/16
1575420/240/480V50/60Hz120/240V3.000kVA9 1/8 8 1/4 3 1/2 985 3/4 7 1/2 3/8 1
1575520/240/480V50/60Hz120/240V5.000kVA9 1/8 8 1/4 611 1/2 88 1/4 103/8 1
16025115V50/60Hz26.5V100VA2 8/1632 12/162 13/1613/6410/16   
16026200/230V50/60Hz26.5V100VA2-1/232-3/42-13/1613/645/8   
16212115/230V50/60Hz26.5V100VA2 8/1632 12/162 13/1613/6410/16   
16340 0.025kVA2 11/16 2 1/4 132 3/16 22 5/8 13/64 3/8
16341 0.050kVA3 1/16 2 9/16 132 1/2 22 5/8 13/64 3/8
16342 0.075kVA3 1/16 2 9/16 1 1/2 3 1/2 2 1/2 2 1/2 3 1/8 13/64 3/8
16343 0.100kVA3 7/16 2 7/8 1 3/8 3 3/8 2 13/16 2 3/8 3 13/64 3/8
16344 0.150kVA3 13/16 3 3/16 1 7/8 4 1/8 3 1/8 2 7/8 3 1/2 13/64 3/8
16345 0.175kVA3 13/16 3 3/16 1 7/8 4 1/8 3 1/8 2 7/8 3 1/2 13/64 3/8
16346 0.200kVA4 9/16 3 13/16 1 3/8 4 3/8 3 3/4 2 3/8 3 13/64 3/8
16347 0.250kVA4 9/16 3 13/16 1 7/8 4 7/8 3 3/4 2 7/8 3 1/2 13/64 3/8
16348 0.350kVA4 9/16 3 13/16 2 3/4 5 3/4 3 3/4 3 7/8 5 1/8 9/32 9/16
16349 0.500kVA5 5/16 4 7/16 2 3/4 64 3/8 3 7/8 5 1/8 9/32 9/16
16350 0.750kVA5 5/16 4 7/16 47 1/4 4 3/8 5 1/8 6 3/8 9/32 9/16
16351 1.000kVA6 1/2 5 7/16 36 5/8 5 5/16 4 1/2 5 7/8 5/16 11/16
16352 1.500kVA7 3/16 6 3/16 3 3/8 7 1/2 5 13/16 4 7/8 6 1/4 5/16 11/16
16353 2.000kVA7 3/16 6 3/16 4 1/4 8 3/8 5 13/16 5 3/4 7 1/8 5/16 11/16
16354 3.000kVA9 1/8 8 1/4 3 1/2 985 3/4 7 1/2 3/8 1
16355 5.000kVA8 1/48 1/4 611 1/288 1/4 103/8 1
16562230/(400)/460V50/60Hz24V100VA2 8/1632 12/162 13/1613/6410/16   
16563230/(400)/460V50/60Hz26.5V100VA2 8/1632 12/162 13/1613/6410/16   
16564400/460V50/60Hz24V100VA2 8/1632 12/162 13/1613/6410/16   
16565400/460V50/60Hz26.5V100VA2 8/1632 12/162 13/1613/6410/16   
Displaying 47 of 47 models