Description
The Square D 250SV43B is a 0.25 kVA single-phase buck and boost transformer designed for voltage correction in industrial and commercial electrical systems. It supports a 120 × 240 VAC primary with a 12/24 VAC secondary that can be interconnected for autotransformer operation. This dry-type transformer is housed in a NEMA 3R enclosure for indoor and outdoor installations.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Square D |
| Category |
Power Distribution |
| Part Number |
250SV43B |
| Subcategory |
Buck and Boost Transformers |
| Product Type |
Buck and Boost Transformer |
| Power Rating |
0.25 kVA |
| Phase |
Single-phase |
| Primary Voltage |
120 × 240 VAC |
| Secondary Voltage |
12 / 24 VAC |
| Input Voltage |
120 × 240 VAC |
| Output Voltage |
12 / 24 VAC |
| Temperature Rating |
80 °C |
| Temperature Rise |
80 °C |
| Enclosure Type |
Dry type |
| Enclosure Rating |
NEMA 3R |
| Weight |
9.7 lbs |
Information About 250SV43B
The 250SV43B is a buck and boost transformer manufactured by Square D for flexible voltage adjustment applications. It is commonly used to compensate for over-voltage or under-voltage conditions by interconnecting the primary and secondary windings. The transformer features a dry-type design with an 80 °C temperature rise rating and is suitable for demanding electrical environments. Its NEMA 3R enclosure provides protection against rain, sleet, and external moisture exposure.
Key Features:
- Buck and Boost Transformer Design: Allows voltage correction by stepping voltage up or down.
- Autotransformer Capability: Primary and secondary windings can be interconnected.
- 0.25 kVA Power Rating: Suitable for small load voltage adjustment applications.
- Dual Secondary Voltage Output: Provides 12 VAC or 24 VAC secondary options.
- Single-Phase Operation: Designed for standard single-phase electrical systems.
- NEMA 3R Enclosure: Rated for indoor and outdoor installations.
- Dry-Type Construction: Requires no liquid cooling or maintenance.
The 250SV43B delivers the reliability and precision required for voltage correction and control in electrical distribution systems.
