VFD17AMS43ANSAA New Original Delta MS300 Series Variable Frequency Drive VFD17AMS43ANSAA

The Delta VFD17AMS43ANSAA is a 10 HP, 480V class AC drive in the MS300 family, built for compact motor control in three-phase industrial systems. It is rated at 17A in heavy-duty use and 20.5A in normal-duty use, with an IP20 enclosure and a frequency range up to 599 Hz.

This model uses open-loop vector control, also described as sensorless vector control, and supports DC injection braking plus dynamic braking. It is not positioned as a closed-loop or regenerative unit, making it ideal for systems where reliable speed control, compact size, and drive-side flexibility matter more than closed-loop feedback architecture.

The VFD17AMS43ANSAA works well in compact three-phase motor-control systems that need dependable speed regulation without the added complexity of closed-loop hardware.

• Conveyors, pumps, and fans
• Mixers and light process equipment
• Packaging machines and general factory automation
• Retrofit applications in the 480V, 10 HP range

Its compact D1 frame, IP20 housing, and built-in braking support make it particularly useful in control cabinets where space and clean wiring matter.

Before replacing this drive, confirm the voltage class, phase requirement, motor horsepower, and duty-current target.

For machines that cycle hard at low speed or start under heavier load, the 17A heavy-duty rating is the critical specification. For lighter duty applications, the 20.5A normal-duty rating may be more appropriate.

Verify whether the existing application depends on closed-loop feedback or line regeneration, as this model is designed for sensorless vector control and does not support these functions.

It is a Delta MS300 variable frequency drive rated for 10 HP / 7.5 kW, 480V class, 3-phase input, with 17A heavy-duty and 20.5A normal-duty current ratings.

No. The published specifications describe it as an open-loop vector or sensorless vector drive and specifically indicate closed loop: no. It is best used where vector-style motor control is needed without encoder-based feedback.

Yes. This model lists DC injection braking, dynamic braking, and an included dynamic braking transistor, which makes it more capable than a bare inverter in stop-and-deceleration applications.

Heavy-duty and normal-duty ratings reflect different load expectations. For this drive, the published values are 17A HD and 20.5A ND. In practice, the heavy-duty value is the safer sizing reference for tougher starts and higher overload demand, while normal-duty is more appropriate for lighter variable-torque applications.

Check the machine's input voltage, motor HP/kW, required current, control method, and whether the application needs closed-loop or regenerative features. Also confirm cabinet space, because this model uses a D1 frame and IP20 enclosure, so it is intended for protected panel installation rather than exposed field mounting.