SIRIUS 3RU Thermal Overload Relays - Size S2 Screw Terminals

Size S2 bimetallic thermal overload relays from the Siemens SIRIUS series featuring robust screw terminal connection technology. Engineered to protect heavy-duty electric motors against thermal overload conditions, locked rotors, and phase failures up to 60°C ambient cabinet temperatures. Covering current setting ranges from 28A up to 80A, these relays include manual/automatic RESET, test/STOP buttons, and integrated 1 NO + 1 NC auxiliary contacts. Plugs directly underneath Siemens 3RT203 Size S2 power contactors.

Key Features:

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

• Expanded Power Range: Size S2 frame supporting heavy motor loads with current ratings up to 80A.

• Direct Contactor Mounting: Plugs directly underneath 3RT203 Size S2 power contactors without additional wiring.

  Sipariş Kodu	Gövde Boyutu	Termik Ayar Sahası (A)	Bağlantı Tipi
  3RU2136-4FB1	Boy S2	28 - 40 A	Vida Bağlantılı
  3RU2136-4GB1	Boy S2	36 - 45 A	Vida Bağlantılı
  3RU2136-4HB1	Boy S2	40 - 50 A	Vida Bağlantılı
  3RU2136-4QB1	Boy S2	47 - 57 A	Vida Bağlantılı
  3RU2136-4JB1	Boy S2	54 - 65 A	Vida Bağlantılı
  3RU2136-4KB1	Boy S2	62 - 73 A	Vida Bağlantılı
  3RU2136-4RB1	Boy S2	70 - 80 A	Vida Bağlantılı

Tags: siemens 3ru2136, size s2 overload relay, screw terminal thermal relay, siemens motor protection