3RT1045-3XB40-0LA2
CONTACTOR, AC-3, 37KW/400V

From SIEMENS

Power contactor, AC-3 80 A, 37 kW / 400 V 24 V DC, 0.7-1.25* Us 3-pole, Size S3 Spring-type terminal With electronic control unit Integrated varistor !!! Phased-out product !!! Successor is SIRIUS 3RT2 Preferred successor type is >>3RT2038-3XB40-0LA2<<
Product brand nameSIRIUS
Product designationPower contactor
General technical data
Size of contactorS3
maximum permissible voltage for safe isolation
between coil and main contacts acc. to EN 60947-1690 V
Protection class IP
on the frontIP20; IP20 on the front with cover / box terminal
of the terminalIP00
Shock resistance at rectangular impulse
at DC6,8g / 5 ms, 4g / 10 ms
Shock resistance with sine pulse
at DC10,6g / 5 ms, 6,2g / 10 ms
Mechanical service life (switching cycles)
of contactor typical10 000 000
of the contactor with added electronics-compatible auxiliary switch block typical5 000 000
of the contactor with added auxiliary switch block typical10 000 000
Reference code acc. to DIN EN 81346-2Q
Ambient conditions
Installation altitude at height above sea level
maximum2 000 m
Main circuit
Number of poles for main current circuit3
Number of NO contacts for main contacts3
Number of NC contacts for main contacts0
Operating current
at AC-1 at 400 V
— at ambient temperature 40 °C rated value120 A
at AC-1
— up to 690 V at ambient temperature 40 °C rated value120 A
— up to 690 V at ambient temperature 60 °C rated value100 A
— up to 1000 V at ambient temperature 40 °C rated value60 A
— up to 1000 V at ambient temperature 60 °C rated value50 A
at AC-3
— at 400 V rated value80 A
— at 690 V rated value58 A
— at 1000 V rated value30 A
at AC-4 at 400 V rated value66 A
Connectable conductor cross-section in main circuit at AC-1
at 60 °C minimum permissible35 mm²
at 40 °C minimum permissible50 mm²
Operating current for approx. 200000 operating cycles at AC-4
at 400 V rated value34 A
at 690 V rated value22 A
Operating current
at 1 current path at DC-1
— at 24 V rated value100 A
— at 110 V rated value9 A
with 2 current paths in series at DC-1
— at 24 V rated value100 A
— at 110 V rated value100 A
with 3 current paths in series at DC-1
— at 24 V rated value100 A
— at 110 V rated value100 A
Operating current
at 1 current path at DC-3 at DC-5
— at 24 V rated value40 A
— at 110 V rated value2.5 A
with 2 current paths in series at DC-3 at DC-5
— at 24 V rated value100 A
— at 110 V rated value100 A
with 3 current paths in series at DC-3 at DC-5
— at 24 V rated value100 A
— at 110 V rated value100 A
Operating power
at AC-1
— at 230 V at 60 °C rated value38 kW
— at 400 V rated value66 kW
— at 690 V at 60 °C rated value114 kW
— at 1000 V at 60 °C rated value82 W
at AC-2 at 400 V rated value37 kW
at AC-3
— at 230 V rated value22 kW
— at 400 V rated value37 kW
— at 500 V rated value45 kW
— at 690 V rated value55 kW
— at 1000 V rated value37 W
Operating power for approx. 200000 operating cycles at AC-4
at 400 V rated value17.9 kW
at 690 V rated value21.1 kW
Thermal short-time current limited to 10 s760 A
Power loss [W] at AC-3 at 400 V for rated value of the operating current per conductor7.7 W
No-load switching frequency
at DC1 000 1/h
Operating frequency
at AC-1 maximum900 1/h
at AC-2 maximum400 1/h
at AC-3 maximum1 000 1/h
at AC-4 maximum300 1/h
Control circuit/ Control
Type of voltage of the control supply voltageDC
Control supply voltage at DC
rated value24 V
Operating range factor control supply voltage rated value of magnet coil at DC
initial value0.7
Full-scale value1.25
Design of the surge suppressorwith varistor
Closing power of magnet coil at DC19 W
Holding power of magnet coil at DC12 W
Closing delay
at DC90 ... 230 ms
Opening delay
at DC14 ... 20 ms
Arcing time10 ... 15 ms
Residual current of the electronics for control with signal <0>
at AC at 230 V maximum permissible25 mA
at DC at 24 V maximum permissible43 mA
Auxiliary circuit
Number of NC contacts for auxiliary contacts
instantaneous contact0
Number of NO contacts for auxiliary contacts
instantaneous contact0
Operating current at AC-12 maximum10 A
Operating current at AC-15
at 230 V rated value6 A
at 400 V rated value3 A
Operating current at DC-12
at 60 V rated value6 A
at 110 V rated value3 A
at 220 V rated value1 A
Operating current at DC-13
at 24 V rated value10 A
at 60 V rated value2 A
at 110 V rated value1 A
at 220 V rated value0.3 A
Contact reliability of auxiliary contacts1 faulty switching per 100 million (17 V, 1 mA)
UL/CSA ratings
Contact rating of auxiliary contacts according to ULA600 / Q600
Short-circuit protection
Design of the fuse link
for short-circuit protection of the main circuit
— with type of coordination 1 requiredfuse gL/gG: 250 A
— with type of assignment 2 requiredfuse gL/gG: 160 A
for short-circuit protection of the auxiliary switch requiredfuse gL/gG: 10 A
Installation/ mounting/ dimensions
(mounting type)screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail
Mounting type Side-by-side mountingYes
Height176 mm
Width70 mm
Depth152 mm
Required spacing
with side-by-side mounting
— forwards20 mm
— upwards10 mm
— downwards10 mm
— at the side10 mm
for grounded parts
— forwards20 mm
— upwards10 mm
— at the side10 mm
— downwards10 mm
for live parts
— forwards20 mm
— upwards10 mm
— downwards10 mm
— at the side10 mm
Connections/Terminals
Type of electrical connection
for main current circuitscrew-type terminals
for auxiliary and control current circuitspring-loaded terminals
Type of connectable conductor cross-sections
for main contacts
— solid2x (2.5 ... 16 mm²)
— stranded2x (10 ... 50 mm²)
— single or multi-stranded2x (2,5 ... 16 mm²)
— finely stranded with core end processing2x (2.5 ... 35 mm²)
— finely stranded without core end processing2x (10 ... 35 mm²)
at AWG conductors for main contacts2x (10 ... 1/0)
Type of connectable conductor cross-sections
for auxiliary contacts
— solid2x (0.25 ... 2.5 mm²)
— finely stranded with core end processing2x (0.25 ... 1.5 mm²)
— finely stranded without core end processing2x (0.25 ... 2.5 mm²)
at AWG conductors for auxiliary contacts2x (24 ... 14)

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