The VW3A7703 is a braking resistor accessory manufactured by Schneider Electric for use with Altivar variable speed drives. It is designed to dissipate the braking energy generated when a motor decelerates, helping the drive system safely slow to a stop and enabling higher transient braking torque.
Parameters
General
Product Type: Braking resistor
Manufacturer: Schneider Electric
Model: VW3A7703
Protection Rating: IP20 (indoor use, protection against solid objects >12 mm)
Electrical Characteristics
Resistance Value: 28 Ω (at 20 °C)
Power Rating: 200 W average at 50 °C (approx. 231 W at 40 °C)
Rated Operational Voltage:
• 24 V DC @ 0.1 A
• 250 V AC @ 1 A
Thermal Protection: Via drive or temperature‑controlled switch (~120 °C)
Connection: Screw terminal
• <= 1.5 mm² / AWG 16 for temp control switch
• <= 4 mm² / AWG 28 for drive connection
Mechanical / Environmental
Net Weight: ~3.5 kg
Dimensions:
• Width ≈ 140 mm
• Height ≈ 393 mm
• Depth ≈ 120 mm
Ambient Operating Temperature: 0…50 °C
Ambient Storage Temperature: –25…70 °C
Country of Origin: Germany (typical for this part designation)
Compatibility
Compatible with Altivar variable speed drives, including but not limited to ATV312, ATV31C, ATV32, ATV61, and ATV71 series.