# AutomationDirect GS33-4075

Hardware · `GS33-4075` · verification: source checked

The AutomationDirect GS33-4075 is an enclosed DURApulse GS30 series AC variable frequency drive for three-phase 460 VAC input and a 75 hp motor rating. It supports SVC, V/Hz, FOC, encoder, and torque control modes and provides one RS-485 (RJ45) port and one USB B port. Modbus RTU and Modbus ASCII slave protocols are supported, and optional communication, encoder, and I/O modules are available.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Supply voltage | 460 VAC |
| Rated power | 55.9274904 kW |
| Rated current | 112 A |
| Frame size | I |
| Output type | PWM output |
| IP rating | IP20 |
| Operating temp min | -20 °C |
| Operating temp max | 50 °C |

## Connected

- Manufacturer: [AutomationDirect](https://machineschema.com/manufacturer/automationdirect.md)
- Protocols: [MODBUS ASCII](https://machineschema.com/protocol/modbus-ascii.md), [MODBUS RTU](https://machineschema.com/protocol/modbus-rtu.md)

## Safety

- Safe Torque Off (STO) is built-in.
- IP20 enclosure; operating temperature range is -20 to +50 °C.
- UL Listed File # E198015; CE; RoHS status is yes.
- A user-supplied external fuse is required.

## Study notes

- DURApulse GS30 series drive in an enclosed frame size I housing, mounted by panel or wall.
- Control modes: SVC, V/Hz, FOC, encoder, or torque.
- Communication ports: one RS-485 (RJ45) and one USB B; port speed up to 115.2k baud.
- Analog I/O includes 2 analog inputs with 12-bit resolution and 1 analog output with 10-bit resolution.
- Discrete I/O includes 7 sinking/sourcing inputs at 24 VDC and 3 relay/sinking/sourcing outputs; one Form C relay is provided.
- Carrier frequency range is 2–15 kHz; output frequency range is 0.1–599 Hz.
- External dynamic braking unit required; no integrated EMI filter; not internally bypassed.
- Variable torque amperage rating is 128 A.
- For use with 3-phase induction and permanent magnet AC motors.
- Programming language is ladder; connector type is spring clamp terminals; a user-supplied external fuse is required.
- Optional communication, encoder, and I/O modules are available.
- Item shipping weight is 97 lb.

## Sources

1. [DURApulse AC High-performance Drive: 460 VAC, 75hp with 3-phase input, (VFD) (PN# GS33-4075) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs33-4075) (accessed 2026-10-26)
2. [GS33 4075 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS33-4075_cutsheet.pdf) (accessed 2026-10-26)

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