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The 3RB21 solid-state overload relays are suitable for customers from all industries who want to guarantee optimum inverse-time delayed protection of their electrical loads (e.g. motors) under normal and heavy duty conditions, minimize project completion times, inventories and power consumption, and optimize plant availability and maintenance management.
The 3RB21 solid-state overload relays have been designed for the protection of induction motors in sinusoidal 50/60 Hz voltage networks. The relays are not suitable for the protection of single-phase AC or DC loads.

Screw Terminals

Trip Type Class 5, 10, 20 and 30 Adjustable

Overload Protection, Phase Failure Protection and Unbalance Protection

Internal Ground-Fault Detection (Requires Activation)

Internal Power Supply

Auxiliary Contacts 1 NO + 1 NC

Manual and Automatic RESET

Electrical Remote RESET Integrated

Switch Position Indicators

TEST Function and Self-Monitoring

Brand/Series	3RB Series
Contact Current Rating	80 A
Current Rating	12.5 to 50 A
Depth	4.291" (109mm)
Dimensions	2.165 x 3.622 x 4.291" (55 x 92 x 109 mm)
For Use With	Motor Protection Size S2, Class 5-30
Length	2.165" (55mm)
Mounting Style	Panel Mount
Relay Type	Solid State
Size	S2
Special Features	Manual or Automatic Reset, Internal Earth Fault Detection
Temperature, Operating, Maximum	60°C
Temperature, Operating, Minimum	-25°C
Temperature, Operating, Range	-25 to 60°C
Terminal Type	Screw
Type	Relay
Width	3.622" (92mm)
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• Siemens
  Sirius 3RT 3 Pole Contactor, 40 A, 18.5 kW, 110V ac@ 50 Hz, 120V ac@ 60 Hz Coil
  
  型号：3RT1035-1AK60
  仓库库存编号：70239743
  
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Brand/Series 3RB Series  Siemens Brand/Series 3RB Series  Contactor & Control Relay Overloads Brand/Series 3RB Series  Siemens Contactor & Control Relay Overloads Brand/Series 3RB Series   Contact Current Rating 80 A  Siemens Contact Current Rating 80 A  Contactor & Control Relay Overloads Contact Current Rating 80 A  Siemens Contactor & Control Relay Overloads Contact Current Rating 80 A   Current Rating 12.5 to 50 A  Siemens Current Rating 12.5 to 50 A  Contactor & Control Relay Overloads Current Rating 12.5 to 50 A  Siemens Contactor & Control Relay Overloads Current Rating 12.5 to 50 A   Depth 4.291" (109mm)  Siemens Depth 4.291" (109mm)  Contactor & Control Relay Overloads Depth 4.291" (109mm)  Siemens Contactor & Control Relay Overloads Depth 4.291" (109mm)   Dimensions 2.165 x 3.622 x 4.291" (55 x 92 x 109 mm)  Siemens Dimensions 2.165 x 3.622 x 4.291" (55 x 92 x 109 mm)  Contactor & Control Relay Overloads Dimensions 2.165 x 3.622 x 4.291" (55 x 92 x 109 mm)  Siemens Contactor & Control Relay Overloads Dimensions 2.165 x 3.622 x 4.291" (55 x 92 x 109 mm)   For Use With Motor Protection Size S2, Class 5-30  Siemens For Use With Motor Protection Size S2, Class 5-30  Contactor & Control Relay Overloads For Use With Motor Protection Size S2, Class 5-30  Siemens Contactor & Control Relay Overloads For Use With Motor Protection Size S2, Class 5-30   Length 2.165" (55mm)  Siemens Length 2.165" (55mm)  Contactor & Control Relay Overloads Length 2.165" (55mm)  Siemens Contactor & Control Relay Overloads Length 2.165" (55mm)   Mounting Style Panel Mount  Siemens Mounting Style Panel Mount  Contactor & Control Relay Overloads Mounting Style Panel Mount  Siemens Contactor & Control Relay Overloads Mounting Style Panel Mount   Relay Type Solid State  Siemens Relay Type Solid State  Contactor & Control Relay Overloads Relay Type Solid State  Siemens Contactor & Control Relay Overloads Relay Type Solid State   Size S2  Siemens Size S2  Contactor & Control Relay Overloads Size S2  Siemens Contactor & Control Relay Overloads Size S2   Special Features Manual or Automatic Reset, Internal Earth Fault Detection  Siemens Special Features Manual or Automatic Reset, Internal Earth Fault Detection  Contactor & Control Relay Overloads Special Features Manual or Automatic Reset, Internal Earth Fault Detection  Siemens Contactor & Control Relay Overloads Special Features Manual or Automatic Reset, Internal Earth Fault Detection   Temperature, Operating, Maximum 60°C  Siemens Temperature, Operating, Maximum 60°C  Contactor & Control Relay Overloads Temperature, Operating, Maximum 60°C  Siemens Contactor & Control Relay Overloads Temperature, Operating, Maximum 60°C   Temperature, Operating, Minimum -25°C  Siemens Temperature, Operating, Minimum -25°C  Contactor & Control Relay Overloads Temperature, Operating, Minimum -25°C  Siemens Contactor & Control Relay Overloads Temperature, Operating, Minimum -25°C   Temperature, Operating, Range -25 to 60°C  Siemens Temperature, Operating, Range -25 to 60°C  Contactor & Control Relay Overloads Temperature, Operating, Range -25 to 60°C  Siemens Contactor & Control Relay Overloads Temperature, Operating, Range -25 to 60°C   Terminal Type Screw  Siemens Terminal Type Screw  Contactor & Control Relay Overloads Terminal Type Screw  Siemens Contactor & Control Relay Overloads Terminal Type Screw   Type Relay  Siemens Type Relay  Contactor & Control Relay Overloads Type Relay  Siemens Contactor & Control Relay Overloads Type Relay   Width 3.622" (92mm)  Siemens Width 3.622" (92mm)  Contactor & Control Relay Overloads Width 3.622" (92mm)  Siemens Contactor & Control Relay Overloads Width 3.622" (92mm)