SIRIUS 3RU Thermal Overload Relays - Size S3 Screw Terminals

Size S3 bimetallic thermal overload relays from the Siemens SIRIUS series featuring robust screw terminal connection technology. Engineered to protect high-power electric motors and heavy-duty industrial applications against thermal overload conditions, locked rotors, and phase failures up to 60°C ambient cabinet temperatures. Covering current setting ranges from 57A up to 100A, these relays include manual/automatic RESET, test/STOP buttons, and integrated 1 NO + 1 NC auxiliary contacts. Plugs directly underneath Siemens 3RT204 Size S3 power contactors.

Key Features:

• Heavy-Duty Current Capacity: Size S3 frame supporting demanding motor loads with current ratings up to 100A.

• Heavy-Duty Screw Terminals: Standard screw terminals designed for large conductor cross-sections and secure high-current connections.

• Direct Contactor Mounting: Plugs directly underneath 3RT204 Size S3 power contactors without additional wiring.

  Sipariş Kodu	Gövde Boyutu	Termik Ayar Sahası (A)	Bağlantı Tipi
  3RU2146-4KB1	Boy S3	57 - 75 A	Vida Bağlantılı
  3RU2146-4LB1	Boy S3	70 - 90 A	Vida Bağlantılı
  3RU2146-4MB1	Boy S3	80 - 100 A	Vida Bağlantılı

Tags: siemens 3ru2146, size s3 overload relay, screw terminal thermal relay, siemens motor protection