3RH1844-2GG20-0KT3
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From SIEMENS

Contactor relay, 4 NO + 4 NC, 110 V AC, 50 / 60 Hz, Size S00, basic unit Spring-loaded connection technology, Auxiliary switch spring-type connection system, Screw terminal with full-wave rectifier !!! Phased-out product !!! Successor is SIRIUS 3RH2
Product brand nameSIRIUS
Product designationAuxiliary contactor
General technical data
Size of contactorS00
Product extension
Auxiliary switchNo
Insulation voltage
with degree of pollution 3 rated value690 V
Degree of pollution3
Surge voltage resistance rated value6 kV
Protection class IP
on the frontIP20
Shock resistance10g / 5 ms and 5g / 10 ms
Mechanical service life (switching cycles)
of contactor typical10 000 000
Reference code acc. to DIN EN 81346-2K
Reference code acc. to DIN EN 61346-2K
Ambient conditions
Installation altitude at height above sea level
maximum2 000 m
Ambient temperature
during operation-25 ... +60 °C
during storage-55 ... +80 °C
during transport-55 ... +80 °C
Control circuit/ Control
Type of voltage of the control supply voltageAC
Control supply voltage at AC
at 50 Hz rated value110 V
at 60 Hz rated value110 V
Control supply voltage frequency
1 rated value50 Hz
2 rated value60 Hz
Operating range factor control supply voltage rated value of magnet coil at AC
at 50 Hz0.8 ... 1.1
at 60 Hz0.85 ... 1.1
Design of the surge suppressorwith full-wave rectification
Apparent pick-up power of magnet coil at AC27 V·A
Inductive power factor with closing power of the coil0.8
Apparent holding power of magnet coil at AC4.6 V·A
Inductive power factor with the holding power of the coil0.27
Auxiliary circuit
Number of NC contacts for auxiliary contacts4
instantaneous contact4
delayed switching0
lagging switching0
make-before-break switching0
Number of NO contacts for auxiliary contacts4
instantaneous contact4
delayed switching0
leading contact0
make-before-break switching0
Number of CO contacts
for auxiliary contacts0
of auxiliary contacts instantaneous contact0
Identification number and letter for switching elements44
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 1 current path at DC-12
at 24 V rated value10 A
at 110 V rated value3 A
at 220 V rated value1 A
Operating current at 1 current path at DC-13
at 24 V rated value10 A
at 110 V rated value1 A
at 220 V rated value0.27 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 auxiliary switch requiredfuse gL/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
Height60 mm
Width45 mm
Depth114 mm
Required spacing
with side-by-side mounting
— at the side0 mm
Connections/Terminals
Type of electrical connection
for auxiliary and control current circuitCage Clamp terminals
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)
Safety related data
B10 value
with high demand rate acc. to SN 319201 000 000; With 0.3 x Ie
Proportion of dangerous failures
with low demand rate acc. to SN 3192040 %
with high demand rate acc. to SN 3192075 %
T1 value for proof test interval or service life acc. to IEC 6150820 y

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