Model Code Definition

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

• 040: Rated current 9.5 A (≈ 4.0 kW at 400 V)

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

• 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 VSEW-EURODRIVE

• Frequency: 50 / 60 Hz (±10%)SEW-EURODRIVE

• Rated current: 8.8 A (at 400 V)

Output

• Rated power: 4.0 kW

• Rated current: 9.5 A (at 400 V)

• Apparent power: 6.6 kVA

• Frequency range: 0–150 Hz

• Overload: 125% continuous; 150% for 60 s

Control & Interfaces

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

• 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. 184 × 296 × 218 mm

• Weight: approx. 5.9 kg

Key Features

1. 4 kW regenerative performance

   Delivers full 4‑quadrant operation; recycles braking energy back to the grid, eliminating external brake resistors and lowering energy costs.
2. Compact & robust design

   Small footprint for 4 kW; IP20 enclosure and comprehensive protections ensure reliability in standard industrial environments.
3. High‑efficiency control

   Sensorless vector control provides smooth torque across the speed range, ideal for fans, pumps, and conveyors needing stable speed regulation.
4. Flexible expansion

   Add external EMC filter for Class C2 compliance; optional fieldbus modules (PROFINET, EtherNet/IP) enable networked automation systems.

Typical Applications

• Medium‑sized conveyors, belt feeders

• Industrial fans, centrifugal pumps, compressors

• Material handling, packaging machinery

• Automation systems requiring energy recovery

Related Models

• 31B030-503-4-00: 2.2 kW, 4‑quadrant regenerative

• 31B040-503-1-00: 4.0 kW, 3‑quadrant standard (no regeneration)

• 31C040-503-4-00: 4.0 kW, higher‑performance 31C series