product brand nameSIRIUS
product designationfunction module
product type designation3RA28
General technical data
size of contactor can be combined company-specificS00, S0
product component semi-conductor outputYes
product extension required remote controlNo
product extension optional remote controlNo
insulation voltage for overvoltage category III according to IEC 60664 with degree of pollution 3 rated value300 V
test voltage for isolation test1.5 kV
degree of pollution3
surge voltage resistance rated value4 kV
test voltage for surge voltage test4 800 V
at 24 V24 mA
at 240 V7 mA
protection class IP of the terminalIP20
shock resistance according to IEC 60068-2-2715 g / 11 ms
vibration resistance according to IEC 60068-2-610 ... 59 Hz: 0.35 mm, 60 ... 150 Hz: 2 g
mechanical service life (operating cycles) typical100 000 000
electrical endurance (operating cycles) at AC-15 at 230 V typical10 000 000
with contactor 3R.2 of frame size S0010 000 000
with contactor 3R.2 of frame size S010 000 000
adjustable time0.05 ... 100 s
relative setting accuracy relating to full-scale value15 %
ON period/maximum minimum35 ms
recovery time50 ms
reference code according to IEC 81346-2K
active principleelectronic
relative repeat accuracy1 %
influence of the surrounding temperature±1 %
power supply influence±1 %
Substance Prohibitance (day/month/year)10/01/2009
SVHC substance nameLead CAS-No. 7439-92-1 Lead monoxide (lead oxide) CAS-No. 1317-36-8 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one CAS-No. 71868-10-5 Melamine CAS-No. 108-78-1
Net Weight94.38 g
Product Function
product function star-delta circuitNo
Control circuit/ Control
type of voltage of the control supply voltageAC/DC
at 50 Hz rated value24 ... 240 V
at 60 Hz rated value24 ... 240 V
at 50 Hz24 ... 240 V
at 60 Hz24 ... 240 V
control supply voltage frequency 150 ... 60 Hz
control supply voltage at DC rated value24 ... 240 V
control supply voltage 1 at DC24 ... 240 V
initial value0.85
full-scale value1.1
initial value0.85
full-scale value1.1
initial value0.85
full-scale value1.1
design of the surge suppressorwith varistor
Switching Function
ON-delayNo
ON-delay/instantaneous contactNo
passing make contactNo
passing make contact/instantaneous contactNo
OFF delayYes
flashing symmetrically with interval start/instantaneousNo
flashing symmetrically with interval startNo
flashing symmetrically with pulse start/instantaneousNo
flashing symmetrically with pulse startNo
flashing asymmetrically with interval startNo
flashing asymmetrically with pulse startNo
constant clock cycle with pulse startNo
constant clock cycle with interval startNo
variably clocked with pulse startNo
variably clocked with interval startNo
star-delta circuit with delay timeNo
star-delta circuitNo
additive ON-delayNo
passing break contactNo
passing break contact/instantaneousNo
OFF delayYes
OFF delay/instantaneousNo
pulse delayedNo
pulse delayed/instantaneousNo
pulse-shapingNo
pulse-shaping/instantaneousNo
additive ON-delay/instantaneousNo
ON-delay/OFF-delayNo
ON-delay/OFF-delay/instantaneousNo
passing make contactNo
passing make contact/instantaneous contactNo
retrotriggerable with deactivated control signal/instantaneous contactNo
retrotriggerable with switched-on control signalNo
retrotriggerable with switched-on control signal/instantaneous contactNo
retriggerable with deactivated control signalNo
design of the control terminal non-floatingYes
Auxiliary circuit
delayed switching0
instantaneous contact0
delayed switching1
instantaneous contact0
delayed switching0
instantaneous contact0
operating frequency with 3RT2 contactor maximum2 500 1/h
Main circuit
type of voltageAC/DC
Inputs/ Outputs
non-volatileNo
Electromagnetic compatibility
EMC immunity according to IEC 61812-1Environment A (industrial area)
due to burst according to IEC 61000-4-42 kV network connection / 1 kV control connection
due to conductor-earth surge according to IEC 61000-4-52 kV
due to conductor-conductor surge according to IEC 61000-4-51 kV
field-based interference according to IEC 61000-4-310 V/m
electrostatic discharge according to IEC 61000-4-28 kV
Safety related data
category according to EN 954-1none
Electrical Safety
protection class IP on the front according to IEC 60529IP20
touch protection on the front according to IEC 60529finger-safe, for vertical contact from the front
type of insulationBasic insulation
Connections/ Terminals
product component removable terminal for auxiliary and control circuitYes
type of electrical connectionscrew terminal
for auxiliary and control circuitscrew-type terminals
solid0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)
finely stranded with core end processing1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)
for AWG cables solid2x (20 ... 14)
for AWG cables stranded2x (20 ... 14)
solid0.5 ... 4 mm²
finely stranded with core end processing0.5 ... 2.5 mm²
finely stranded without core end processing0.25 ... 1.5 mm²
solid20 ... 14
stranded20 ... 14
Installation/ mounting/ dimensions
mounting positionany (like contactor)
fastening methodclip-on
height38 mm
width45 mm
depth74 mm
— forwards0 mm
— backwards0 mm
— upwards0 mm
— downwards0 mm
— at the side0 mm
— forwards0 mm
— backwards0 mm
— upwards0 mm
— at the side0 mm
— downwards0 mm
— forwards0 mm
— backwards0 mm
— upwards0 mm
— downwards0 mm
— at the side0 mm
Ambient conditions
installation altitude at height above sea level maximum2 000 m
during operation-25 ... +60 °C
during storage-40 ... +85 °C
during transport-40 ... +85 °C
relative humidity during operation0 ... 95 %