Siemens 3RU2136-4RB0 - Overload Relay 70-80A (S2 Frame)
Siemens 3RU2136-4RB0 - Overload Relay 70-80A (S2 Frame)

Siemens 3RU2136-4RB0 - Overload Relay 70-80A (S2 Frame)

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Siemens 3RU2136-4RB0 is a thermal overload relay designed for motor protection, utilizing a Class 10A trip unit to safeguard against overloads and phase failures. This relay operates with a current range of 70 to 80 amperes and supports an operating voltage up to 690 V AC, with a rated operational current of 80 A at AC-3e duty. It features an S2 frame size, screw mounting for both main and auxiliary circuits, and an automatic reset with an approximate 10-minute recovery time, weighing 1 lb. The device complies with IEC standards for motor protection, offering shock resistance of 8g / 11 ms per IEC 60068-2-27 and an IP20 protection class on the front with IP00 at the terminals. It is commonly used in industrial motor control applications requiring reliable overload protection in IEC-based systems.

Key Features & Specifications
  • Type: Overload Relay
  • Current range: 70-80 A
  • Operating voltage: up to 690 V AC
  • Size: S2 frame
  • Trip class: 10A
  • Mounting type: Screw for main and auxiliary circuits
  • Automatic reset with approx. 10 min recovery time
  • Shock resistance: 8g / 11 ms per IEC 60068-2-27
  • Protection class: IP20 front, IP00 terminals
  • Suitable for IEC motor protection
  • Power loss: 18.9 W at rated current
  • Weight: 1 lb