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500 VA Buck-Boost Base Transformer, 120/240V × 16/32V, Single Phase
$276.89
Sanzo Power 500 VA single-phase buck-boost base transformer — 120/240V × 16/32V 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: 20
Inventory & Inbound
20 currently in stock
- 60 more available, earliest Jul 21, 2026
Projected inbound quantities and dates are based on current purchase orders with our suppliers and are not guaranteed. We update them as suppliers confirm.
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| Item | This item — Sanzo Power TX-B2-050H-124210 | Acme Electric T181058 | Jefferson Electric 416-1231-000 | Hammond Power Solutions QC35ESCB | Federal Pacific K1XGF16-.500 | SolaHD HS20F500B |
| Price | $276.89 | $512.00 | $493.00 | $532.00 | $521.00 | $540.00 |
| Availability | ✔ In Stock: 20 | 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 | 500 VA | — | — | — | — | — |
| Primary Voltage | 120/240V | 120/240V | 120/240V | 120/240V | 120/240V | 120/240V |
| Secondary Voltage | 16/32V | 16/32V | 16/32V | 16/32V | 16/32V | 16/32V |
| Phase | Single Phase | Single-Phase | Single-Phase | Single-Phase | Single-Phase | Single-Phase |
| Enclosure | NEMA 3R | — | — | — | — | — |
| Listing | cETLus Listed | — | — | — | — | — |
| Max Primary OCP | 6A | — | — | — | — | — |
| 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 | 0.5 kVA |
| Primary Voltage | 120/240V |
| Secondary Voltage | 16/32V |
| Phase | Single Phase |
| Max Primary OCP | 6A |
| Conduit Knockout | 1/2" NPT |
| Frequency | 50/60 Hz |
| Temperature Rise | 115°C |
| Insulation | 180°C |
| Configuration | Resin-Encapsulated |
| Part # | TX-B2-050H-124210 |
| 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 × 9.25 × 3.86 in |
| Weight | 17 lb |
Product Description
The TX-B2-050H-124210 is a 500 VA single-phase, resin-encapsulated buck-boost transformer. It has a dual 120/240V primary winding and a 16/32V low-voltage winding — these are the transformer’s windings, not a 120/240V-to-16/32V 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 16/32V.
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.