Model Code Definition

• 31B: Series (MOVITRAC 31B, compact regenerative type)

• 030: Rated current 7.3 A (≈ 2.2 kW at 400 V)

• 503: 3‑phase 380–500 V AC input, no integrated EMC filter

• 4: 4‑quadrant operation (regenerative braking, energy feedback to grid)

• 00: Standard firmware, no fieldbus, no STO safety

Technical Specifications

Input

• Rated voltage: 3‑phase AC 380–500 V

• Frequency: 50 / 60 Hz (±5%)SEW-EURODRIVE

• Rated current: 6.7 A (at 400 V)

Output

• Rated power: 2.2 kW

• Rated current: 7.3 A (at 400 V)

• Apparent power: 5.1 kVA

• Frequency range: 0–150 Hz

• Overload: 125% continuous; 150% for 60 sSEW-EURODRIVE

Control & Interfaces

• Control modes: V/F open‑loop, sensorless vector control (VFC)

• Digital I/O: 6 inputs / 2 outputs / 1 relay

• Analog I/O: 2 inputs / 2 outputs

• Protection: Overcurrent, overvoltage, undervoltage, overtemperature, earth fault, short circuit

Mechanical & Environmental

• Protection class: IP20SEW-EURODRIVE

• Ambient temp: 0 °C to +45 °C (derate >40 °C)

• Storage temp: -25 °C to +70 °C

• Dimensions (W×H×D): approx. 178 × 279 × 152 mm

• Weight: approx. 2.04 kg

Key Features

1. Compact regenerative design

   Small footprint with 4‑quadrant regeneration; feeds braking energy back to the grid, eliminating external brake resistors and reducing energy use.
2. Light‑duty high efficiency

   Optimized for 2.2 kW motors; sensorless vector control delivers smooth torque at low speeds, suitable for simple, cost‑effective applications.
3. Robust & easy integration

   IP20 enclosure, standard protections, and modular design simplify installation and maintenance in standard industrial environments.SEW-EURODRIVE
4. Flexible expansion

   Add external EMC filter for Class C2 compliance; optional fieldbus modules (PROFINET, EtherNet/IP) enable network control.SEW-EURODRIVE

Typical Applications

• Small conveyors, belt feeders

• Industrial fans, centrifugal pumps, compressors

• Light material handling, packaging machinery

• Automation systems requiring basic energy recovery

Related Models

• 31B015-503-4-00: 0.75 kW, 4‑quadrant regenerative

• 31B022-503-4-00: 1.5 kW, 4‑quadrant regenerative

• 31B030-503-1-00: 2.2 kW, 3‑quadrant standard (no regeneration)