3RT2018-2KG42-0LA0
RAIL-CONTACTOR,AC3:7,5KW DC125V, SDI

From SIEMENS

Traction contactor, AC-3 16 A, 7.5 kW / 400 V 125 V DC 0.7-1.25* Us, with integrated suppressor diode 3-pole, Size S00 Spring-type terminals suitable for PLC outputs
Product brand nameSIRIUS
Product designationPower contactor
Product type designation3RT2
General technical data
Size of contactorS00
Product extension
function module for communicationNo
Auxiliary switchYes
Insulation voltage
of main circuit with degree of pollution 3 rated value690 V
of auxiliary circuit with degree of pollution 3 rated value690 V
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 DC7.3g / 5 ms, 4.7g / 10 ms
Shock resistance with sine pulse
at DC11,4g / 5 ms, 7,3g / 10 ms
Mechanical service life (switching cycles)
of contactor typical30 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
Operating voltage
at AC-3 rated value maximum690 V
Operating current
at AC-1 at 400 V
— rated value22 A
— at ambient temperature 40 °C rated value22 A
at AC-1
— up to 690 V at ambient temperature 40 °C rated value22 A
— up to 690 V at ambient temperature 60 °C rated value20 A
at AC-2 at 400 V rated value16 A
at AC-3
— at 400 V rated value16 A
— at 500 V rated value12.4 A
— at 690 V rated value8.9 A
at AC-4 at 400 V rated value11.5 A
Connectable conductor cross-section in main circuit at AC-1
at 60 °C minimum permissible2.5 mm²
at 40 °C minimum permissible4 mm²
Operating current for approx. 200000 operating cycles at AC-4
at 400 V rated value5.5 A
at 690 V rated value4.4 A
Operating current
at 1 current path at DC-1
— at 24 V rated value20 A
— at 110 V rated value2.1 A
— at 220 V rated value0.8 A
— at 440 V rated value0.6 A
— at 600 V rated value0.6 A
with 2 current paths in series at DC-1
— at 24 V rated value20 A
— at 110 V rated value12 A
— at 220 V rated value1.6 A
— at 440 V rated value0.8 A
— at 600 V rated value0.7 A
with 3 current paths in series at DC-1
— at 24 V rated value20 A
— at 110 V rated value20 A
— at 220 V rated value20 A
— at 440 V rated value1.3 A
— at 600 V rated value1 A
Operating current
at 1 current path at DC-3 at DC-5
— at 24 V rated value20 A
— at 110 V rated value0.1 A
with 2 current paths in series at DC-3 at DC-5
— at 24 V rated value20 A
— at 110 V rated value0.35 A
with 3 current paths in series at DC-3 at DC-5
— at 24 V rated value20 A
— at 110 V rated value20 A
— at 220 V rated value1.5 A
— at 440 V rated value0.2 A
— at 600 V rated value0.2 A
Operating power
at AC-1
— at 230 V at 60 °C rated value7.5 kW
— at 400 V rated value13 kW
— at 400 V at 60 °C rated value13 kW
— at 690 V at 60 °C rated value22 kW
at AC-2 at 400 V rated value7.5 kW
at AC-3
— at 230 V rated value4 kW
— at 400 V rated value7.5 kW
— at 500 V rated value7.5 kW
— at 690 V rated value7.5 kW
Operating power for approx. 200000 operating cycles at AC-4
at 400 V rated value2.5 kW
at 690 V rated value3.5 kW
Thermal short-time current limited to 10 s128 A
Power loss [W] at AC-3 at 400 V for rated value of the operating current per conductor2.2 W
No-load switching frequency
at DC10 000 1/h
Control circuit/ Control
Type of voltageDC
Type of voltage of the control supply voltageDC
Control supply voltage at DC
rated value125 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 suppressor diode
Closing power of magnet coil at DC13 W
Holding power of magnet coil at DC4 W
Closing delay
at DC30 ... 100 ms
Opening delay
at DC7 ... 13 ms
Arcing time10 ... 15 ms
Control version of the switch operating mechanismE1 - A2
Auxiliary circuit
Number of NC contacts for auxiliary contacts1
Operating current at AC-12 maximum10 A
Operating current at AC-15
at 230 V rated value10 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 value10 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 value14 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 value5 hp
— at 460/480 V rated value10 hp
— at 575/600 V rated value10 hp
Contact rating of auxiliary contacts according to ULA600 / Q600
Short-circuit protection
Product function Short circuit protectionNo
Design of the fuse link
for short-circuit protection of the main circuit
— with type of coordination 1 requiredgG: 50A (690V,100kA), aM: 25A (690V,100kA), BS88: 50A (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
Height70 mm
Width45 mm
Depth117 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 circuitspring-loaded terminals
for auxiliary and control current circuitspring-loaded terminals
Type of connectable conductor cross-sections
for main contacts
— solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
— single or multi-stranded2x (0,5 ... 4 mm²)
— finely stranded with core end processing2x (0.5 ... 2.5 mm²)
— finely stranded without core end processing2x (0.5 ... 2.5 mm²)
at AWG conductors for main contacts2x (20 ... 12)
Type of connectable conductor cross-sections
for auxiliary contacts
— single or multi-stranded2x (0,5 ... 4 mm²)
— finely stranded with core end processing2x (0.5 ... 2.5 mm²)
— finely stranded without core end processing2x (0.5 ... 2.5 mm²)
at AWG conductors for auxiliary contacts2x (20 ... 12)
AWG number as coded connectable conductor cross section
for main contacts20 ... 12
for auxiliary contacts20 ... 12
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
Communication/ Protocol
Product function Bus communicationNo

External links