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SIRIUS
Siemens Industry, Inc. Industrial Control Product Catalog 2017
2/15
2
COnTACTORS And ASSEMbliES
3RT, 3RH Contactors for Special Applications
Contactors with Extended Operating Range 0.7 ... 1.25 x , for Railway Applications
3RH21 contactor relays
3/54
SIRIUS Innovations Supplement 2012
Illustrations are approximate
3
Selection and ordering data
DC operation · DC solenoid system
Spring-type terminals
For screw and snap-on mounting onto standard mounting rail
Solenoid coil fitted with suppressor diode
1)
It is not possible to mount an auxiliary switch block.
2)
4-pole auxiliary switch block according to EN 50005 can be mounted.
More information
All specifications and technical specifications not mentioned
here are identical to those of the standard contactor relays.
3RH21 22-2K . 40 3RH21 22-2K . 40-0LA0
Rated operational current

e
/AC-15/AC-14
T
u
: 70 °C at
Contacts Rated control supply
voltage U
s
Spring-type terminals Weight
approx.
230 V 400 V 500 V 690 V Version
Order No.
A A A A NO NC V DC kg
3RH21 contactor relays
Size S00
Without series resistor
Terminal designations according to EN 50011
2 NO + 2 NC, identification number 22E
10 3 2 1 2 2
1)
24 3RH21 22-2KB40 0.300
110
3RH21 22-2KF40 0.300
With series resistor
Terminal designations according to EN 50005
2 NO + 1 NC, identification number 21E
10 3 2 1 2 1
2)
24 3RH21 22-2KB40-0LA0 0.300
110
3RH21 22-2KF40-0LA0 0.300
A1(+)
A2(–)
14
13
44
43
22
21
32
31
A1(+)
A2(–)
32
31
24
23
14
13
epyTsrotcatnoC 3RH21 ..
Upright mounting position
• Contactors with series resistor Special version (on request)
• Contactors without series resistor
Special version (on request)
Ambient temperature
C°noitarepo gniruD• -40 ... +70
C°egarots gniruD•
-55 ... +80
Solenoid coil operating range DC
0.7 ... 1.25 x U
s
Power consumption of the solenoid coils For cold coil and 1.0 x U
s
WgnisolC-rotsiser seires htiw srotcatnoC• 13
WdesolC-
4
WgnisolC-rotsiser seires tuohtiw srotcatnoC•
2.8
WdesolC-
2.8
U
s
LV1N_03_06.fm Page 54 Thursday, October 31, 2013 11:31 AM
Contactors and Contactor Assemblies
3RT, 3RH Contactors for Special Applications
3RH21 contactor relays