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250 VA Buck-Boost Base Transformer, 240/480V × 24/48V, Single Phase
$230.00
Sanzo Power 250 VA single-phase buck-boost base transformer — 240/480V × 24/48V dual windings. Resin-encapsulated, NEMA 3R, wall mount, 115°C rise, cETLus. For small voltage corrections in single- or three-phase buck-boost banks.
✔ In Stock: 4
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| Price | $230.00 | $426.00 | $409.00 | $442.00 | $432.00 | $448.00 |
| Availability | ✔ In Stock: 4 | Ships in 10-14 weeks | Ships in 8-12 weeks | Ships in 10-14 weeks | Ships in 12-16 weeks | Ships in 12-16 weeks |
| Add to Cart | View | View | View | View | View | |
| Brand | Sanzo Power | Acme Electric | Jefferson Electric | Hammond Power Solutions | Federal Pacific | SolaHD |
| Capacity | 250 VA | — | — | — | — | — |
| Primary Voltage | 240/480V | 240/480V | 240/480V | 240/480V | 240/480V | 240/480V |
| Secondary Voltage | 24/48V | 24/48V | 24/48V | 24/48V | 24/48V | 24/48V |
| Phase | Single Phase | Single-Phase | Single-Phase | Single-Phase | Single-Phase | Single-Phase |
| Enclosure | NEMA 3R | — | — | — | — | — |
| Listing | cETLus Listed | — | — | — | — | — |
| Max Primary OCP | 3A | — | — | — | — | — |
| Frequency | 50/60 Hz | — | — | — | — | — |
| Temperature Rise | 115°C | — | — | — | — | — |
| Insulation | 180°C | — | — | — | — | — |
| Configuration | Resin-Encapsulated | — | — | — | — | — |
| Taps | None | — | — | — | — | — |
| Mount | Wall | — | — | — | — | — |
| Transformer Type | Buck/Boost | — | — | — | — | — |
Specifications
| Brand | Sanzo Power |
| Capacity | 0.25 kVA |
| Primary Voltage | 240/480V |
| Secondary Voltage | 24/48V |
| Phase | Single Phase |
| Max Primary OCP | 3A |
| Conduit Knockout | 1/2" NPT |
| Frequency | 50/60 Hz |
| Temperature Rise | 115°C |
| Insulation | 180°C |
| Configuration | Resin-Encapsulated |
| Part # | TX-B2-025H-115216 |
| Taps | None |
| Winding Material | Aluminum |
| Weatherproof Rating | NEMA 3R |
| Enclosure Material | Steel |
| Finish Color | ANSI 70 Light Grey |
| Certification Listing | cETLus |
| Transformer Type | Buck/Boost |
| Dimensions (W×H×D) | 4.77 × 8.07 × 3.86 in |
| Weight | 12 lb |
Product Description
The TX-B2-025H-115216 is a 250 VA single-phase, resin-encapsulated buck-boost transformer. It has a dual 240/480V primary winding and a 24/48V low-voltage winding — these are the transformer’s windings, not a 240/480V-to-24/48V conversion. Wired as a buck-boost autotransformer, the low-voltage winding adds to or subtracts from the supply to make small voltage corrections (typically a few percent), so the unit carries only the correction portion of the load and supports a much larger connected load. It can also serve as an isolation transformer at 24/48V.
Housed in a NEMA 3R steel enclosure (ANSI 70 light grey) for indoor or outdoor mounting with 1/2" NPT conduit knockouts, aluminum windings, Class 180°C insulation, 115°C rise, 50/60 Hz, no taps, cETLus listed. Use one unit for single-phase, two (open delta) or three (wye) for three-phase buck-boost banks.