3RT2024-1DB44-3MA0
CONTAC.,AC3:5.5KW 2NO+2NC DC24V VARISTOR

From SIEMENS

power contactor, AC-3 12 A, 5.5 kW / 400 V 2 NO + 2 NC, 24 V DC with inserted varistor 3-pole, Size S0 screw terminal Captive auxiliary switch for SUVA applications
Product brand nameSIRIUS
Product designationPower contactor
Product type designation3RT2
General technical data
Size of contactorS0
Product extension
function module for communicationNo
Auxiliary switchNo
Surge voltage resistance
of main circuit rated value6 kV
of auxiliary circuit rated value6 kV
maximum permissible voltage for safe isolation
between coil and main contacts acc. to EN 60947-1400 V
Protection class IP
on the frontIP20
of the terminalIP20
Shock resistance at rectangular impulse
at DC10g / 5 ms, 7,5g / 10 ms
Shock resistance with sine pulse
at DC15g / 5 ms, 10g / 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 40719 extended according to IEC 204-2 acc. to IEC 750K
Reference code acc. to DIN EN 81346-2Q
Ambient conditions
Installation altitude at height above sea level
maximum2 000 m
Ambient temperature
during operation-25 ... +60 °C
during storage-55 ... +80 °C
Main circuit
Number of poles for main current circuit3
Number of NO contacts for main contacts3
Operating voltage
at AC-3 rated value maximum690 V
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-2 at 400 V rated value12 A
at AC-3
— at 400 V rated value12 A
— at 500 V rated value12 A
— at 690 V rated value9 A
at AC-4 at 400 V rated value12.5 A
at AC-5a up to 690 V rated value35.2 A
at AC-5b up to 400 V rated value9.9 A
at AC-6a
— up to 230 V at current peak n=20 rated value11.4 A
— up to 400 V at current peak n=20 rated value11.4 A
— up to 500 V at current peak n=20 rated value11.3 A
— up to 690 V at current peak n=20 rated value9 A
at AC-6a
— up to 230 V at current peak n=30 rated value7.6 A
— up to 400 V at current peak n=30 rated value7.6 A
— up to 500 V at current peak n=30 rated value7.6 A
— up to 690 V at current peak n=30 rated value7.6 A
Connectable conductor cross-section in main circuit at AC-1
at 60 °C minimum permissible10 mm²
at 40 °C minimum permissible10 mm²
Operating current for approx. 200000 operating cycles at AC-4
at 400 V rated value5.5 A
at 690 V rated value5.5 A
Operating current
at 1 current path at DC-1
— at 24 V rated value35 A
— at 110 V rated value4.5 A
— at 220 V rated value1 A
— at 440 V rated value0.4 A
— at 600 V rated value0.25 A
with 2 current paths in series at DC-1
— at 24 V rated value35 A
— at 110 V rated value35 A
— at 220 V rated value5 A
— at 440 V rated value1 A
— at 600 V rated value0.8 A
with 3 current paths in series at DC-1
— at 24 V rated value35 A
— at 110 V rated value35 A
— at 220 V rated value35 A
— at 440 V rated value2.9 A
— at 600 V rated value1.4 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
— at 220 V rated value1 A
— at 440 V rated value0.09 A
— at 600 V rated value0.06 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
— at 220 V rated value3 A
— at 440 V rated value0.27 A
— at 600 V rated value0.16 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
— at 220 V rated value10 A
— at 440 V rated value0.6 A
— at 600 V rated value0.6 A
Operating power
at AC-1
— at 230 V rated value13.3 kW
— at 230 V at 60 °C rated value13.3 kW
— at 400 V rated value23 kW
— at 400 V at 60 °C rated value23 kW
— at 690 V rated value40 kW
— at 690 V at 60 °C rated value40 kW
at AC-2 at 400 V rated value5.5 kW
at AC-3
— at 230 V rated value3 kW
— at 400 V rated value5.5 kW
— at 500 V rated value5.5 kW
— at 690 V rated value7.5 kW
Operating power for approx. 200000 operating cycles at AC-4
at 400 V rated value2.6 kW
at 690 V rated value4.6 kW
Thermal short-time current limited to 10 s110 A
Power loss [W] at AC-3 at 400 V for rated value of the operating current per conductor0.5 W
No-load switching frequency
at DC1 500 1/h
Operating frequency
at AC-1 maximum1 000 1/h
at AC-2 maximum1 000 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 value0.8
Full-scale value1.1
Design of the surge suppressorwith varistor
Closing power of magnet coil at DC5.9 W
Holding power of magnet coil at DC5.9 W
Closing delay
at DC50 ... 170 ms
Opening delay
at DC15 ... 17.5 ms
Arcing time10 ... 10 ms
Control version of the switch operating mechanismStandard A1 - A2
Residual current of the electronics for control with signal <0>
at DC at 24 V maximum permissible16 mA
Auxiliary circuit
Number of NC contacts for auxiliary contacts
instantaneous contact2
Number of NO contacts for auxiliary contacts
instantaneous contact2
Operating current at AC-12 maximum10 A
Operating current at AC-15
at 230 V rated value6 A
at 400 V rated value3 A
at 500 V rated value2 A
at 690 V rated value1 A
Operating current at DC-12
at 24 V rated value10 A
at 48 V rated value6 A
at 60 V rated value6 A
at 110 V rated value3 A
at 125 V rated value2 A
at 220 V rated value1 A
at 600 V rated value0.15 A
Operating current at DC-13
at 24 V rated value6 A
at 48 V rated value2 A
at 60 V rated value2 A
at 110 V rated value1 A
at 125 V rated value0.9 A
at 220 V rated value0.3 A
at 600 V rated value0.1 A
Contact reliability of auxiliary contacts1 faulty switching per 100 million (17 V, 1 mA)
UL/CSA ratings
Full-load current (FLA) for three-phase AC motor
at 480 V rated value11 A
at 600 V rated value11 A
Yielded mechanical performance [hp]
for single-phase AC motor
— at 110/120 V rated value1 hp
— at 230 V rated value2 hp
for three-phase AC motor
— at 200/208 V rated value3 hp
— at 220/230 V rated value3 hp
— at 460/480 V rated value7.5 hp
— at 575/600 V rated value10 hp
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 requiredgG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)
— with type of assignment 2 requiredgG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
for short-circuit protection of the auxiliary switch requiredgG: 10 A (500 V, 1 kA)
Installation/ mounting/ dimensions
Mounting position+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface
Mounting typescrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
Height85 mm
Width45 mm
Depth151 mm
Required spacing
with side-by-side mounting
— forwards10 mm
— upwards10 mm
— downwards10 mm
— at the side0 mm
for grounded parts
— forwards10 mm
— upwards10 mm
— at the side6 mm
— downwards10 mm
for live parts
— forwards10 mm
— upwards10 mm
— downwards10 mm
— at the side6 mm
Connections/Terminals
Type of electrical connection
for main current circuitscrew-type terminals
for auxiliary and control current circuitscrew-type terminals
Type of connectable conductor cross-sections
for main contacts
— solid2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)
— single or multi-stranded2x (1 ... 2,5 mm²), 2x (2,5 ... 10 mm²)
— finely stranded with core end processing2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²
at AWG conductors for main contacts2x (16 ... 12), 2x (14 ... 8)
Connectable conductor cross-section for main contacts
solid1 ... 10 mm²
stranded1 ... 10 mm²
finely stranded with core end processing1 ... 10 mm²
Connectable conductor cross-section for auxiliary contacts
single or multi-stranded0.5 ... 2.5 mm²
finely stranded with core end processing0.5 ... 2.5 mm²
Type of connectable conductor cross-sections
for auxiliary contacts
— single or multi-stranded2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²)
— finely stranded with core end processing2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
at AWG conductors for auxiliary contacts2x (20 ... 16), 2x (18 ... 14)
AWG number as coded connectable conductor cross section
for main contacts16 ... 8
for auxiliary contacts20 ... 14
Safety related data
B10 value
with high demand rate acc. to SN 319201 000 000
Proportion of dangerous failures
with low demand rate acc. to SN 3192040 %
with high demand rate acc. to SN 3192073 %
Failure rate [FIT]
with low demand rate acc. to SN 31920100 FIT
Product function
Mirror contact acc. to IEC 60947-4-1Yes
positively driven operation acc. to IEC 60947-5-1No
T1 value for proof test interval or service life acc. to IEC 6150820 y
Protection against electrical shockfinger-safe

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