Siemens 3RB1056-1FW0 Overload Relay

The Siemens 3RB1056-1FW0 is a robust overload relay designed for reliable motor and circuit protection in industrial systems. It operates at a rated voltage of 600V AC and supports 50/60 Hz frequency. Engineered for safety and performance, it features a high rated insulation voltage of 690V, impulse-withstand voltage of 8kV, and a short-circuit current rating of 10kA at 600V. The unit is compatible with fuses up to 700A and supports various cable sizes for flexible installation.

• Manufacturer: Siemens
• Type: Overload Relay
• Model: 3RB1056-1FW0

Technical Specifications:

• Rated Voltage: 600V AC
• Frequency: 50/60 Hz
• Rated Insulation Voltage (UI): 690V
• Rated Impulse-Withstand Voltage (Uimp): 8kV
• Short-Circuit Current Rating: 10kA at 600V
• Max Fuse: 700A
• Torque: 0.7 / 1.2 Nm (7 / 10.3 lb.in)
• Cable Sizes:
  • 2×0.5 / 1.5 (2.5) mm²
  • 2×0.75 / 2.5 mm²
  • 2xAWG 18 to 14

Applications:

• Motor protection systems
• Control panels and switchgear
• Automation and process control
• Industrial machinery