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Datasheet generated 2026-10-07
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Siemens SIRIUS 3RB3 Electronic Overload Relay 12.5...50 A, Size S2, Class 10E, Main Straight-through transformer, Aux Screw (3RB3036-1UW1)

Siemens · Switchgear & Protection · Overload Relays · Germany · siemens.com
Part Number
3RB3036-1UW1  ·  HS 8536.49
Siemens SIRIUS 3RB3 Electronic Overload Relay 12.5...50 A, Size S2, Class 10E, Main Straight-through transformer, Aux Screw (3RB3036-1UW1)

Siemens 3RB3036-1UW1 SIRIUS Electronic Overload Relay 12.5...50 A.

Technical Specifications

Manufacturer part number (MPN)3RB3036-1UW1
EAN / GTIN4011209936409
Sales unitpcs
Product brand nameSIRIUS
Product designationsolid-state overload relay
Product type designation3RB3
Size of overload relayS2
Power loss [W] for rated value of the current at AC in hot operating state0.1 W
Insulation voltage with degree of pollution 3 at AC rated value690 V
Surge voltage resistance rated value6 kV
Shock resistance15 g / 11 ms
Vibration resistance1 … 6 Hz, 15 mm; 6 … 500 Hz, 20 m/s²; 10 cycles
Thermal current50 A
Recovery time after overload trip — with automatic reset typical3 min
Installation altitude at height above sea level maximum2 000 m
Ambient temperature — during operation-25 ... +60 °C
Ambient temperature — during storage-40 ... +80 °C
Relative humidity during operation10 ... 95 %
Number of poles for main current circuit3
Adjustable current response value current of the current-dependent overload release12.5 ... 50 A
Operating voltage rated value690 V
Operating frequency rated value50 ... 60 Hz
Operational current rated value50 A
Operating power — for 3-phase motors at 400 V at 50 Hz7.5 ... 22 kW
Operating power — for AC motors at 500 V at 50 Hz11 ... 30 kW
Operating power — for AC motors at 690 V at 50 Hz11 ... 45 kW
Design of the auxiliary switchintegrated
Number of NC contacts for auxiliary contacts1
Number of NO contacts for auxiliary contacts1
Trip classCLASS 10E
Design of the overload releaseelectronic
Full-load current (FLA) for 3-phase AC motor at 480 V rated value50 A
Contact rating of auxiliary contacts according to ULB600 / R300
Mounting positionany
Fastening methodstand-alone installation
Installation/ mounting/ dimensions — height81 mm
Installation/ mounting/ dimensions — width55 mm
Installation/ mounting/ dimensions — depth109 mm
Type of electrical connection for main current circuitstraight-through transformers
Type of connectable conductor cross-sections for main contacts solid or stranded1x (1 ... 50 mm²), 2x (1 ... 35 mm²)
Tightening torque for auxiliary contacts with screw-type terminals0.8 ... 1.2 N·m
Protection class IP on the front according to IEC 60529IP20
Touch protection on the front according to IEC 60529finger-safe, for vertical contact from the front
Display version for switching statusSlide switch
Mounting methodSeparate positioning
Width55 mm
Height81 mm
Depth109 mm
Number of auxiliary contacts as normally open contact1
Number of auxiliary contacts as normally closed contact1
Release classCLASS 10
Type of electrical connection of main circuitThrough-feed current converter
Reset function inputNo
Reset function automaticYes
Country of originCzechia

Properties

MOQ1

Cross-References

Attached Documents