Data sheet
3RU2126-4DJ0
Overload relay 20...25 A Thermal For motor protection Size S0, Class 10
Contactor mounting Main circuit: Ring cable lug Auxiliary circuit: ring cable
lug Manual-Automatic-Reset
product brand name
SIRIUS
product designation
thermal overload relay
product type designation
3RU2
General technical data
size of overload relay
S0
size of contactor can be combined company-specific
S0
power loss [W] for rated value of the current at AC in hot
operating state
8.1 W
● per pole
2.7 W
insulation voltage with degree of pollution 3 at AC rated
value
690 V
surge voltage resistance rated value
6 kV
maximum permissible voltage for safe isolation in
networks with grounded star point
● between auxiliary and auxiliary circuit
440 V
● between auxiliary and auxiliary circuit
440 V
● between main and auxiliary circuit
440 V
● between main and auxiliary circuit
440 V
shock resistance acc. to IEC 60068-2-27
8g / 11 ms
type of protection according to ATEX directive
2014/34/EU
Ex II (2) GD
certificate of suitability according to ATEX directive
2014/34/EU
DMT 98 ATEX G 001
reference code acc. to IEC 81346-2
F
Substance Prohibitance (Date)
01.10.2009 00:00:00
Ambient conditions
installation altitude at height above sea level maximum
2 000 m
● ambient temperature during operation
-40 ... +70 °C
● ambient temperature during storage
-55 ... +80 °C
● ambient temperature during transport
-55 ... +80 °C
temperature compensation
-40 ... +60 °C
relative humidity during operation
10 ... 95 %
Main circuit
number of poles for main current circuit
3
adjustable current response value current of the
current-dependent overload release
20 ... 25 A
● operating voltage rated value
690 V
● operating voltage at AC-3 rated value maximum
690 V
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operating frequency rated value
50 ... 60 Hz
operational current rated value
25 A
operating power at AC-3
● at 400 V rated value
11 kW
● at 500 V rated value
15 kW
● at 690 V rated value
22 kW
Auxiliary circuit
design of the auxiliary switch
integrated
number of NC contacts for auxiliary contacts
1
● note
number of NO contacts for auxiliary contacts
● note
number of CO contacts for auxiliary contacts
for contactor disconnection
1
for message "Tripped"
0
operational current of auxiliary contacts at AC-15
● at 24 V
3A
● at 110 V
3A
● at 120 V
3A
● at 125 V
3A
● at 230 V
2A
● at 400 V
1A
operational current of auxiliary contacts at DC-13
● at 24 V
2A
● at 60 V
0.3 A
● at 110 V
0.22 A
● at 125 V
0.22 A
● at 220 V
0.11 A
contact rating of auxiliary contacts according to UL
B600 / R300
Protective and monitoring functions
trip class
CLASS 10
design of the overload release
thermal
UL/CSA ratings
full-load current (FLA) for 3-phase AC motor
● at 480 V rated value
25 A
● at 600 V rated value
25 A
Short-circuit protection
design of the fuse link
● for short-circuit protection of the auxiliary switch
required
fuse gG: 6 A, quick: 10 A
Installation/ mounting/ dimensions
mounting position
any
fastening method
Contactor mounting
height
85 mm
width
45 mm
depth
85 mm
Connections/ Terminals
product function removable terminal for auxiliary and
control circuit
No
type of electrical connection
● for main current circuit
Ring cable lug connection
● for auxiliary and control circuit
ring cable connection
arrangement of electrical connectors for main current
circuit
Top and bottom
● tightening torque
— for main contacts for ring cable lug
2.5 ... 2 N·m
— for auxiliary contacts for ring cable lug
0.8 ... 1.2 N·m
outer diameter of the usable ring cable lug maximum
7.5 mm
design of screwdriver shaft
Diameter 5 ... 6 mm
size of the screwdriver tip
Pozidriv PZ 2
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design of the thread of the connection screw
● for main contacts
M4
● of the auxiliary and control contacts
M3
Safety related data
failure rate [FIT] with low demand rate acc. to SN 31920
50 FIT
MTTF with high demand rate
2 280 y
T1 value for proof test interval or service life acc. to
IEC 61508
20 y
protection class IP on the front acc. to IEC 60529
IP00
Display
display version for switching status
Slide switch
Certificates/ approvals
General Product Approval
Declaration of Conformity
Miscellaneous
For use in hazardous locations
Test Certificates
Special Test
Certificate
Marine / Shipping
Type Test
Certificates/Test
Report
Marine / Shipping
other
Confirmation
Railway
Vibration and Shock
Further information
Information- and Downloadcenter (Catalogs, Brochures,…)
https://www.siemens.com/ic10
Industry Mall (Online ordering system)
https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3RU2126-4DJ0
Cax online generator
http://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RU2126-4DJ0
Service&Support (Manuals, Certificates, Characteristics, FAQs,...)
https://support.industry.siemens.com/cs/ww/en/ps/3RU2126-4DJ0
Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)
http://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RU2126-4DJ0&lang=en
Characteristic: Tripping characteristics, I²t, Let-through current
https://support.industry.siemens.com/cs/ww/en/ps/3RU2126-4DJ0/char
Further characteristics (e.g. electrical endurance, switching frequency)
http://www.automation.siemens.com/bilddb/index.aspx?view=Search&mlfb=3RU2126-4DJ0&objecttype=14&gridview=view1
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last modified:
1/18/2021
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© Copyright Siemens
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