SD and SDE (Enterprise) VFD chassis comparison
SD Series

The SD Series variable frequency drive (VFD) is a simple, phase converting (single-phase input, three-phase output) solution for residential and light commercial constant pressure installations (2-15HP). The SD product line offers simple setup, rugged hardware, NEMA Type 3R cabinets, and a robust oil filled pressure transducer.

There are also a number of panel shop options available for the SD Series VFD, including external HOA/Speed Pot controls, output filtering, an integrated service disconnect, or surge protection. Integrating these can save time, money, and space at the installation site.

SD Model Comparison

Standard Features

SD Standard Chassis
2-5 Horsepower
SD Enterprise Chassis
5-15 Horsepower
Phase-converting VFD

NEMA 3R Outdoor Enclosure

Large display, readable in direct sunlight

230 V Models

460 V Models

50°C (122°F) Rated
Ready to be exterior mounted, even in harsh climates

40 C Rated

Optional Features

SD Standard Chassis
2-5 Horsepower
SD Enterprise Chassis
5-15 Horsepower
Panel Shop: Service Disconnect
Make maintenance easy and meet code without an external disconnect

Panel Shop: Strikesorb Surge Protection
Multiple-hit protection, the best available

Panel Shop: Output Filters
Protect your motor, 460 V models only

Panel Shop: HOA Switch and/or Speed Pot

See the SD See the SD Enterprise

Easy Setup

Perfect Pressure™ only requires a few minutes of setup time and is capable of controlling complicated constant pressure plumbing systems with ease and fewer instances of short cycling.

Read more about Perfect Pressure


Custom is usually associated with greatly increased cost and lead times, but not at Phase Technologies, custom is what we do. Learn how our UL 508A panel shop can help you stay on time and on budget.

Read about Phase UL 508A Panel Shop