Siemens 3RU1126-4CB0 is a Sirius thermal bimetallic overload relay that protects three-phase motors with an adjustable 17–22 A setting range. It is a Class 10, Size S0 device rated for up to 690 VAC and 11 kW, with three poles and one normally open plus one normally closed auxiliary contact. It provides screw terminals, manual or automatic reset, phase failure sensitivity, a TEST function and an integrated sealable cover.
Adjustable 17–22 A range; Class 10, Size S0 thermal bimetallic design for motor overload protection
Three-pole configuration with 1 NO and 1 NC auxiliary contact; rated to 690 VAC and 11 kW
Screw terminals, manual/automatic reset, TEST function, STOP button, switching position indication and phase failure sensitivity
Product Highlights
IEC/UL/CSA-rated Sirius overload relay, direct-mount compatible with 3RT1 contactors, for motor protection and phase-failure detection
Product Information
Standard Information
Brand: SIEMENS
Manufacturer Part Number: 3RU1126-4CB0
Technical Specifications
Brand
Siemens
Manufacturer
Siemens
Manufacturer Part Number
3RU1126-4CB0
Series
Sirius
Type
Thermal bimetallic overload relay
Category
Overload Relays
Class
Class 10
Frame Size
S0
Ampere Range
17 - 22 A
Rated Voltage
690 VAC
Power Rating
11 kW
Number of Poles
3
Auxiliary Contacts
1 NO, 1 NC
Terminal Type
Screw terminals
Reset Type
Manual or automatic reset
Protection
Overload, phase asymmetry, phase failure
Functions
TEST function, STOP button, switching position indication, phase failure sensitivity
Mounting / Compatible Contactors
Direct mounting to 3RT1 contactors; compatible with 3RT1023, 3RT1024, 3RT1025, 3RT1026