3RT1024-3BD40-1AA0
CONTACTOR, AC-3 5.5 KW/400 V,

From SIEMENS

Power contactor, AC-3 12 A, 5.5 kW / 400 V 42 V DC, 3-pole, Size S0 Main circuit: Screw terminal Auxiliary circuit: Spring-type terminal Upright mounting position !!! Phased-out product !!! Successor is SIRIUS 3RT2
Product brand nameSIRIUS
Product designationpower contactor
General technical data
Size of contactorS0
Degree of pollution3
Protection class IP
on the frontIP20
of the terminalIP00
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 value40 A
at AC-1
— up to 690 V at ambient temperature 40 °C rated value40 A
— up to 690 V at ambient temperature 60 °C rated value35 A
at AC-3
— at 400 V rated value12 A
at AC-4 at 400 V rated value12.5 A
Operating current
at 1 current path at DC-1
— at 24 V rated value35 A
— at 110 V rated value4.5 A
with 2 current paths in series at DC-1
— at 24 V rated value35 A
— at 110 V rated value35 A
with 3 current paths in series at DC-1
— at 24 V rated value35 A
— at 110 V rated value35 A
Operating current
at 1 current path at DC-3 at DC-5
— at 24 V rated value20 A
— at 110 V rated value2.5 A
with 2 current paths in series at DC-3 at DC-5
— at 24 V rated value35 A
— at 110 V rated value15 A
with 3 current paths in series at DC-3 at DC-5
— at 24 V rated value35 A
— at 110 V rated value35 A
Operating power
at AC-1
— at 400 V rated value23 kW
at AC-2 at 400 V rated value5.5 kW
at AC-3
— at 400 V rated value5.5 kW
— at 500 V rated value7.5 kW
— at 690 V rated value7.5 kW
Power loss [W] at AC-3 at 400 V for rated value of the operating current per conductor0.5 W
Control circuit/ Control
Type of voltage of the control supply voltageDC
Control supply voltage at DC
rated value42 V
Operating range factor control supply voltage rated value of magnet coil at DC
initial value0.8
Full-scale value1.1
Closing power of magnet coil at DC5.4 W
Holding power of magnet coil at DC5.4 W
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)
Short-circuit protection
Design of the fuse link
for short-circuit protection of the main circuit
— with type of coordination 1 requiredfuse gL/gG: 63 A
— with type of assignment 2 requiredfuse gL/gG: 25 A
for short-circuit protection of the auxiliary switch requiredfuse gL/gG: 10 A
Installation/ mounting/ dimensions
Mounting typescrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
Height85 mm
Width45 mm
Depth101 mm
Required spacing
for grounded parts
— at the side6 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 (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), max. 2x 10 mm²
— single or multi-stranded2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²
— finely stranded with core end processing2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)
at AWG conductors for main contacts2x (16 ... 12), 2x (14 ... 10), 1x 8
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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