product brand nameSIRIUS
product designationthermal overload relay
product type designation3RU2
General technical data
size of overload relayS0
size of contactor can be combined company-specificS0
power loss [W] for rated value of the current at AC in hot operating state8.1 W
per pole2.7 W
type of calculation of power loss current-dependentquadratic
insulation voltage with degree of pollution 3 at AC rated value690 V
surge voltage resistance rated value6 kV
in networks with ungrounded star point between auxiliary and auxiliary circuit440 V
in networks with grounded star point between auxiliary and auxiliary circuit440 V
in networks with ungrounded star point between main and auxiliary circuit440 V
in networks with grounded star point between main and auxiliary circuit440 V
shock resistance according to IEC 60068-2-278g / 11 ms
reference code according to IEC 81346-2F
Substance Prohibitance (day/month/year)10/01/2009
Net Weight0.13 kg
Ambient conditions
installation altitude at height above sea level maximum2 000 m
during operation-40 ... +70 °C
during storage-55 ... +80 °C
during transport-55 ... +80 °C
temperature compensation-40 ... +60 °C
relative humidity during operation10 ... 95 %
Main circuit
number of poles for main current circuit3
adjustable current response value current of the current-dependent overload release14 ... 20 A
rated value690 V
at AC-3e rated value maximum690 V
operating frequency rated value50 ... 60 Hz
operational current rated value20 A
operational current at AC-3e at 400 V rated value20 A
— at 400 V rated value7.5 kW
— at 500 V rated value11 kW
— at 690 V rated value15 kW
— at 400 V rated value7.5 kW
— at 500 V rated value11 kW
— at 690 V rated value15 kW
Auxiliary circuit
design of the auxiliary switchintegrated
number of NC contacts for auxiliary contacts1
notefor contactor disconnection
number of NO contacts for auxiliary contacts1
notefor message "Tripped"
number of CO contacts for auxiliary contacts0
at 24 V3 A
at 110 V3 A
at 120 V3 A
at 125 V3 A
at 230 V2 A
at 400 V1 A
at 690 V0.75 A
at 24 V2 A
at 60 V0.3 A
at 110 V0.22 A
at 125 V0.22 A
at 220 V0.11 A
contact rating of auxiliary contacts according to ULB600 / R300
Protective and monitoring functions
trip classCLASS 10
design of the overload releasethermal
UL/CSA ratings
at 480 V rated value20 A
at 600 V rated value20 A
Short-circuit protection
for short-circuit protection of the auxiliary switch requiredfuse gG: 6 A, quick: 10 A
Installation/ mounting/ dimensions
mounting positionfor mounting on contactors: with a vertical mounting plane +/-135° rotatable & +/- 22.5° tiltable, stand-alone installation: with a vertical mounting plane +/-135° rotatable and +/-45° tiltable; for more details see manual
fastening methodContactor mounting
height85 mm
width45 mm
depth85 mm
Connections/ Terminals
product component removable terminal for auxiliary and control circuitNo
for main current circuitscrew-type terminals
for auxiliary and control circuitscrew-type terminals
arrangement of electrical connectors for main current circuitTop and bottom
— solid or 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
for AWG cables for main contacts2x (16 ... 12), 2x (14 ... 8)
— solid or 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)
for AWG cables for auxiliary contacts2x (20 ... 16), 2x (18 ... 14)
for main contacts with screw-type terminals2 ... 2.5 N·m
for auxiliary contacts with screw-type terminals0.8 ... 1.2 N·m
design of screwdriver shaftDiameter 5 ... 6 mm
size of the screwdriver tipPozidriv PZ 2
for main contactsM4
of the auxiliary and control contactsM3
Safety related data
failure rate [FIT] with low demand rate according to SN 3192050 FIT
MTTF with high demand rate2 280 a
IEC 61508
for proof test interval or service life according to IEC 6150820 a
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
Display
display version for switching statusSlide switch