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ABB Overload Relay 16 - 20A- 1SAZ721201R1049


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Category: Relay

Tags ABB , Overload Relay , 1SAZ721201R1049 , TF42-20

Overload Relay 16 - 20A


Brand: ABB

Part Number: 1SAZ721201R1049

Product Type: TF42-20


Setting Range

16 ... 20 A

Rated Operational Voltage

Auxiliary Circuit 600 V AC/DC

Main Circuit 690 V AC

Main Circuit 600 V DC

Rated Operational Current (Ie)

20 A

Rated Frequency (f)

Auxiliary Circuit 50 Hz

Auxiliary Circuit 60 Hz

Auxiliary Circuit DC

Main Circuit 50 Hz

Main Circuit 60 Hz

Rated Impulse Withstand Voltage (Uimp)

Auxiliary Circuit 6 kV

Main Circuit 6 kV

Rated Insulation Voltage (Ui)

690 V

Number of Poles


Conventional Free-air Thermal Current (Ith)

Auxiliary Circuit NC 6 A

Auxiliary Circuit NO 4 A

Degree of Protection


Pollution Degree



The TF42-20 thermal overload relay is an economic electromechanical protection device for the main circuit. It offers reliable and fast protection for motors in the event of overload or phase failure. The device has trip class 10. Further features are the temperature compensation, trip contact (NC), signal contact (NO), automatic- or manual reset selectable, trip-free mechanism, STOP function and a trip indication. The overload relays are connected directly to the block contactors


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