Phase Converters
NAPCco manufactures rotary and digital phase converters that convert single-phase power to three-phase power for every commercial and industrial application, from food service equipment and woodworking shops to CNC machining centers and agricultural operations. Every 3-phase converter we sell is built in the USA at our facility in New Berlin, Wisconsin.
Not sure which type you need? Call us at 877-545-2926. Our application engineers size converters for free, with a guarantee behind every recommendation.
- Lifetime Warranty*
- Made in the USA
- BBB A+
- Sizing Guarantee
- 24/7 Free Lifetime Support
Shop by Converter Type
-
Pro-Line Rotary Phase Converters
PLThe reliable, general-purpose single-phase to 3-phase converter. Pro-Line units use an idler generator and control panel to generate the third phase and run motor, resistive, and inductive loads at full-rated power. A trusted, economical choice for food service, woodworking, metalworking machine tool applications, and more.
Best for
- table saws
- mills
- lathes
- dough mixers
- ovens
- welders
- general machine tools
- multi-machine setups
-
Smart-Boost™ Digital Rotary Phase Converters
SBBuilt specifically for hard-starting and high-inertia motor loads. Smart-Boost™ units add a solid-state current boost on start-up to get demanding equipment running smoothly, without tripping breakers or stressing your single-phase supply.
Best for
- air compressors
- irrigation pumps
- fans
- blowers
- dust collectors
-
TritonPro Maxx™ Digital Phase Converters
TPXNAPCco's premium solid-state digital converter uses AC-DC-AC conversion with IGBT technology to produce clean, perfectly balanced three-phase power automatically, under any load condition. The quietest, most precise converter in the lineup.
Best for
- voltage-sensitive equipment
- CNC machines
- elevators
- HVAC
- electronics
-
Smart-Phase™ Digital Rotary Phase Converters
SPThe most advanced rotary option. Smart-Phase™ uses an 8-stage automatic voltage regulator (AVR) and solid-state switching to actively monitor and correct voltage imbalances in real time, delivering stable, balanced three-phase power even as loads change.
Best for
- CNC machines
- VFD-controlled equipment
- multiple simultaneous loads
-
Rotary Phase Converter Control Panels
CPNAPCco's rotary phase converter control panels (CP series) are designed for customers who want to supply their own idler motor. Each panel includes a motor starter, power factor correction capacitors, and full input/output terminal block connections. Wire in your motor and load, and you've got balanced three-phase power.
Best for
- a cost-effective option when you have a suitable 3-phase motor on hand
-
Static Phase Converters
SPCA low-cost 3-phase converter for light motor loads only. Static converters are best suited to hobby and occasional-use applications where full-rated horsepower isn't required.
Best for
- light-duty single motor applications
- hobby use
Browse All Phase Converters
No products match those filters.
What size do I need?
Properly sizing a phase converter cannot be overstated. Choosing the right size ensures years of trouble-free performance for your equipment. There are no minimum load requirements for an NAPCco phase converter; you can never oversize, but undersizing will cause problems.
Need to convert single-phase power to three-phase for your equipment? Use our sizing tool to find the right converter in seconds. Enter your machine type and horsepower, and we’ll recommend the right model. Buy online with confidence or call us at 877-545-2926, and our engineers will your application for free.
Compare Phase Converter Models
| Rotary & Digital Phase Converters | Static | |||||
|---|---|---|---|---|---|---|
| “PL” Pro-Line | “SB” Smart-Boost | “SP” Smart-Phase | “TPX” TritonPro Max | “CP” Pro-Line Control Panels | SPC and HL | |
| Description | General Purpose, Powers Single and Multiple Loads | Current Booster, Better for Hard and Very Hard Starting Motor Loads | Active 8 Stage Automated Voltage Regulation, Best for every type of load | Advanced Solid-State Digital Phase Converter with Active Voltage Balancing. Best for all types of loads | Build your own Phase Converter. Add your idler motor to a CP Control Panel | For Motors only – will start light and medium motor loads |
| Recommended Loads | Mills, Table Saws, Mixers, Ovens, Welders | Air Compressors, Pumps, Fans, Blowers, Dust Collectors | CNC Equipment, HVAC | CNC Equipment, VFDs, Elevators, Pumps, Air Compressors | Build your own by adding an idler generator | Light and Medium starting and running motors |
| Built-in Starter | Yes | Yes | Yes | – | Yes | – |
| Booster Mode | – | Yes | Yes | – | – | – |
| Auto Voltage Regulation | – | – | Yes | Yes | – | – |
| Digital Controlled Start Circuit | Yes | Yes | Yes | – | Yes | Yes |
| Auto Controls Options | Yes | Yes | Yes | Yes | Yes | – |
| TEFC Idler Option | Yes | Yes | Yes | – | – | – |
| Outdoor Enclosure Option | Yes | Yes | Yes | Yes | Yes | – |
| 480 Volt Input/Output | Yes | – | – | Yes | Yes | – |
| UL/cUL Option | Yes | Yes | Yes | CSA Certified | Yes | – |
| American Made | Yes | Yes | Yes | Yes | Yes | Yes |
| Custom ABB/Baldor Generator | Yes | Yes | Yes | – | – | – |
| Paralleling Option | Yes | – | – | – | Yes | – |
| Models Available | 3 to 100 HP models | 3 to 60 HP models | 5 to 40 HP models | 26 to 240 Amp models | 3 to 60 HP models | 3/4 HP to 10 HP |
| Pricing | $639 to $10,424 | $848 to $7,198 | $1,935 to $6,349 | $2,265 to $26,297 | $289 to $1,029 | $115 to $234 |
| Shop Pro-Line Converters | Shop Smart-Boost Converters | Shop Smart-Phase Converters | Shop TritonPro Max Converters | Shop Control Panels | Shop Static Converters | |
Not sure where to start?
Talk to an application engineer for free
Choosing the wrong converter for your equipment is a frustrating and expensive mistake. That’s why our application engineers take the time to understand your equipment and load type before recommending a unit. Every sizing recommendation is backed by our sizing guarantee. If we get it wrong, we replace the converter and cover all shipping both ways.
*Most NAPC converters include a lifetime warranty. Select lines – such as the TritonPro Maxx digital series – carry their own warranty terms. Each product shows its warranty on the product card and page.