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4.68 kVA Step-Down Buck-Boost Transformer, 250V → 234V, 20A, Single Phase
$375.09
4.68 kVA single-phase buck-boost that bucks 250V to 234V (6% correction) at 20A. Encapsulated NEMA 3R, cETLus listed. In-stock ships same business day.
Ships in 5-6 weeks
Inventory & Inbound
0 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.
Specifications
| Brand | Sanzo Sales |
| Phase | Single Phase (1-PH), AC |
| Capacity | 4.68 kVA |
| Primary Voltage | 250V |
| Primary Amperage | 18.7A |
| Secondary Voltage | 234V |
| Secondary Amperage | 20A |
| Maximum Primary OCP | 25A |
| Frequency | 50/60 Hz |
| Insulation | 180°C |
| Temperature Rise | 115°C |
| Transformer Type | Buck/Boost |
| Part # | TX-BB-250V-234V-20A |
| Configuration | Encapsulated Autotransformer |
| Primary Termination | Lead Wires & Terminal Lugs |
| Secondary Termination | Lead Wires & Terminal Lugs |
| Termination Access | (6) ¾" NPT Hubs |
| Winding Material | Aluminum |
| Enclosure Material | Steel |
| Finish Color | ANSI 70 Light Grey |
| Weatherproof Rating | NEMA 3R |
| Certification Listing | cETLus |
| Dimensions (W×H×D) | 4.65 × 9.25 × 3.86 in |
| Weight | 14 lb |
Product Description
The TX-BB-250V-234V-20A is a 4.68 kVA single-phase buck-boost transformer that bucks a 250V supply to 234V — a 6% voltage correction — bringing 234V-rated equipment back into its proper operating range. Wired as an encapsulated buck transformer (autotransformer), it carries only the correction portion of the load, so this unit corrects a much larger connected load: up to 20A at 234V (4.68 kVA usable line capacity).
Resin-encapsulated in a NEMA 3R steel enclosure (ANSI 70 light grey) for indoor or outdoor mounting at the disconnect. Lead wires and terminal lugs, aluminum windings, 180°C insulation system, 115°C rise, 50/60 Hz, cETLus listed. Use two units in open-delta for three-phase delta systems, three for wye. In-stock units ship the same business day.