3RU2136-4QB0
The Siemens SIRIUS 3RU2136-4QB0 is an S2-size thermal overload relay with a current range of 47 to 57 A. It can be directly connected to the 3RT203 series contactor. Both the main and auxiliary circuits use screw terminals and comply with IEC motor protection standards.
Product Positioning
The Siemens SIRIUS 3RU2136-4QB0 is an S2-size thermal overload relay with a current adjustment range of 47 to 57A. It can be directly connected to the SIRIUS 3RT203 series contactor to form an integrated starting protection unit.
Core Product Advantages and Features
Direct mounting
It can be directly mounted on SIRIUS 3RT203 series contactors, saving control panel wiring space.
47-57A current range
The knob scale can be precisely set to the trip value according to the actual rated current of the motor.
Class 10 Escape Feature
It conforms to the IEC 60947-4-1 thermal operation curve, protecting the motor from overload damage.
Manual/Automatic Reset
It can switch between manual and automatic reset modes according to production line needs, offering high operational flexibility.
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3RU2136-4QB1
The Siemens SIRIUS 3RU2136-4QB1 is an S2-size thermal overload relay with a current range of 47 to 57 A. Its stand-alone design eliminates the need for direct contactor mounting, making it suitable for control panel layouts with separate wiring.
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3RU2136-4KB0
The Siemens SIRIUS 3RU2136-4KB0 is an S2-size thermal overload relay with a current range of 62 to 73 A. It can be directly connected to the 3RT203 series contactor, meets Class 10 tripping rating, and is suitable for high-power three-phase motors.
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3RU2136-4JD0
The Siemens SIRIUS 3RU2136-4JD0 is an S2-size thermal overload relay with a current range of 54 to 65 A. The difference between it and the 4JB0 model with the same current value is that the auxiliary circuit uses a spring-loaded terminal design, allowing for tool-free, quick crimping of the wiring.