3RT2535-1NP30
2NO+2NC CONTACTOR,AC3:18.5KW

From SIEMENS

Power contactor, AC-3 40 A, 18.5 kW / 400 V 2 NO + 2 NC 175-280 V AC/DC 4-pole size S2 screw terminals 1 NO + 1 NC integrated
Product brand nameSIRIUS
Product designationcontactor
Product type designation3RT25
General technical data
Size of contactorS2
Product extension
function module for communicationNo
Auxiliary switchYes
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 terminalIP00
Shock resistance at rectangular impulse
at AC7.7g / 5 ms, 4.5g / 10 ms
at DC7.7g / 5 ms, 4.5g / 10 ms
Shock resistance with sine pulse
at AC12g / 5 ms, 7g / 10 ms
at DC12g / 5 ms, 7g / 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 circuit4
Number of NO contacts for main contacts2
Number of NC contacts for main contacts2
Operating current
at AC-1
— up to 690 V at ambient temperature 40 °C rated value60 A
— up to 690 V at ambient temperature 60 °C rated value55 A
at AC-2 at AC-3 at 400 V
— per NO contact rated value35 A
— per NC contact rated value35 A
Connectable conductor cross-section in main circuit at AC-1
at 60 °C minimum permissible16 mm²
at 40 °C minimum permissible16 mm²
Operating current
at 1 current path at DC-1
— at 24 V rated value55 A
— at 110 V rated value4.5 A
— at 220 V rated value1 A
— at 440 V rated value0.4 A
with 2 current paths in series at DC-1
— at 24 V rated value55 A
— at 110 V rated value45 A
— at 220 V rated value5 A
— at 440 V rated value1 A
Operating current
at 1 current path at DC-3 at DC-5
— at 24 V per NC contact rated value35 A
— at 24 V per NO contact rated value35 A
— at 110 V per NC contact rated value1.25 A
— at 110 V per NO contact rated value2.5 A
— at 220 V per NC contact rated value0.5 A
— at 220 V per NO contact rated value1 A
— at 440 V per NC contact rated value0.045 A
— at 440 V per NO contact rated value0.1 A
with 2 current paths in series at DC-3 at DC-5
— at 24 V per NC contact rated value55 A
— at 24 V per NO contact rated value55 A
— at 110 V per NC contact rated value12.5 A
— at 110 V per NO contact rated value25 A
— at 220 V per NC contact rated value2.5 A
— at 220 V per NO contact rated value5 A
— at 440 V per NC contact rated value0.135 A
— at 440 V per NO contact rated value0.27 A
Operating power
at AC-1
— at 230 V rated value23 kW
— at 400 V rated value39 kW
at AC-2 at AC-3
— at 230 V per NC contact rated value11 kW
— at 230 V per NO contact rated value11 kW
— at 400 V per NC contact rated value18.5 kW
— at 400 V per NO contact rated value18.5 kW
Thermal short-time current limited to 10 s420 A
Power loss [W] at AC-3 at 400 V for rated value of the operating current per conductor4 W
No-load switching frequency
at AC500 1/h
at DC500 1/h
Operating frequency
at AC-1 maximum350 1/h
Control circuit/ Control
Type of voltage of the control supply voltageAC/DC
Control supply voltage at AC
at 50 Hz rated value175 ... 280 V
at 60 Hz rated value175 ... 280 V
Control supply voltage at DC
rated value175 ... 280 V
Operating range factor control supply voltage rated value of magnet coil at DC
initial value0.8
Full-scale value1.1
Operating range factor control supply voltage rated value of magnet coil at AC
at 50 Hz0.8 ... 1.1
at 60 Hz0.8 ... 1.1
Design of the surge suppressorwith varistor
Apparent pick-up power of magnet coil at AC110 V·A
at 50 Hz110 V·A
at 60 Hz110 V·A
Inductive power factor with closing power of the coil0.72
at 50 Hz0.95
at 60 Hz0.95
Apparent holding power of magnet coil at AC2.5 V·A
at 50 Hz2.5 V·A
at 60 Hz2.5 V·A
Inductive power factor with the holding power of the coil0.95
at 50 Hz0.95
at 60 Hz0.95
Closing power of magnet coil at DC70 W
Holding power of magnet coil at DC1.5 W
Closing delay
at AC30 ... 70 ms
at DC30 ... 70 ms
Opening delay
at AC30 ... 55 ms
at DC30 ... 55 ms
Arcing time10 ... 20 ms
Control version of the switch operating mechanismUC
Residual current of the electronics for control with signal <0>
at AC at 230 V maximum permissible20 A
at DC at 24 V maximum permissible20 A
Auxiliary circuit
Number of NC contacts for auxiliary contacts
instantaneous contact1
Number of NO contacts for auxiliary contacts
instantaneous contact1
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 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
Contact rating of auxiliary contacts according to ULA600 / P600
Short-circuit protection
Design of the fuse link
for short-circuit protection of the main circuit
— with type of coordination 1 requiredgG: 125 A (690 V, 100 kA)
— with type of assignment 2 requiredgG: 63A (690V, 100kA)
for short-circuit protection of the auxiliary switch requiredfuse gG: 10 A
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 50022
Side-by-side mountingYes
Height114 mm
Width75 mm
Depth130 mm
Required spacing
with side-by-side mounting
— forwards0 mm
— Backwards0 mm
— upwards0 mm
— downwards0 mm
— at the side0 mm
for grounded parts
— forwards0 mm
— Backwards0 mm
— upwards50 mm
— at the side10 mm
— downwards50 mm
for live parts
— forwards0 mm
— Backwards0 mm
— upwards50 mm
— downwards50 mm
— at the side10 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 ... 35 mm²), 1x (1 ... 50 mm²)
— single or multi-stranded2x (1 ... 35 mm²), 1x (1 ... 50 mm²)
— finely stranded with core end processing2x (1 ... 25 mm²), 1x (1 ... 35 mm²)
at AWG conductors for main contacts2x (18 ... 2), 1x (18 ... 1)
Type of connectable conductor cross-sections
for auxiliary contacts
— solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
— 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 contacts18 ... 1
Safety related data
Product function
Mirror contact acc. to IEC 60947-4-1Yes
positively driven operation acc. to IEC 60947-5-1No
Protection against electrical shockfinger-safe when touched vertically from front acc. to IEC 60529

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