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Siemens 3RB3036-1UB0 - Overload Relay 2000A (Solid-State Protection)

Siemens
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Siemens 3RB3036-1UB0 is a SIRIUS solid-state overload relay engineered for comprehensive motor protection in three-phase industrial systems. This device integrates LIGA (Long-Time, Instantaneous and Ground Fault Alarm) functions to safeguard against overloads, phase asymmetry, and ground faults, operating at a maximum voltage rating of 600V and a continuous current rating of 2000A. The relay features a bolt-on connection, weighs 0.8866 lb, and is constructed for a temperature range of -13 to 158 °F (-25 to 70 °C), with a compact design suitable for contactor mounting. It complies with IEC standards and carries a 100kA interrupting rating at 480V, ensuring robust fault current protection. Typical applications include motor control centers and heavy industrial machinery requiring reliable solid-state protection in three-phase, 3-pole configurations.

Key Features & Specifications
  • Type: Overload Relay
  • Functions: LIGA - Long-Time, Instantaneous and Ground Fault Alarm
  • Voltage Rating: 600V
  • Current Rating: 2000A
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • Protection: Solid State
  • AIC Rating: 100kA@480V
  • Temp Rating: -13-158 °F (-25-70 °C)
  • Weight: 0.8866 lb
  • Country of Origin: Germany
  • Amperage: 12.5–50 A
  • Voltage: 690 V AC, 50/60 Hz
  • Mounting Type: Contactor mount
  • Interrupt Rating: 50 A at 690 V AC
  • Series/Frame: SIRIUS 3RB, Size S2
  • Trip Unit: Solid-state, Class 10
  • Terminal Type: Screw
  • Protection Class: IP20 (front), IP00 (terminal)
  • Temperature Range: -25 to 60 °C
  • Certifications: RoHS compliant
  • Auxiliary Contacts: 1NO/1NC