Data sheet 3RH2122-1BB40

Contactor relay, 2 NO + 2 NC, 24 V DC, Size S00, screw terminal

Product brand name SIRIUS

Product designation Auxiliary contactor
Product type designation 3RH2

General technical data

Size of contactor S00
Product extension
● Auxiliary switch Yes
Insulation voltage
● with degree of pollution 3 at AC rated value 690 V
Degree of pollution 3
Surge voltage resistance rated value 6 kV
Protection class IP
● on the front IP20
Shock resistance at rectangular impulse
● at DC 10g / 5 ms, 5g / 10 ms
Shock resistance with sine pulse
● at DC 15g / 5 ms, 8g / 10 ms
Mechanical service life (switching cycles)
● of contactor typical 30 000 000

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 ● of the contactor with added electronics- 5 000 000
compatible auxiliary switch block typical
● of the contactor with added auxiliary switch 10 000 000
block typical
Reference code acc. to DIN EN 81346-2 K
Reference code acc. to DIN EN 61346-2 K

Ambient conditions
Installation altitude at height above sea level
● maximum 2 000 m
Ambient temperature
● during operation -25 ... +60 °C
● during storage -55 ... +80 °C

Main circuit
No-load switching frequency
● at AC 10 000 1/h
● at DC 10 000 1/h

Control circuit/ Control

Type of voltage of the control supply voltage DC
Control supply voltage at DC
● rated value 24 V
Operating range factor control supply voltage rated
value of magnet coil at DC
● initial value 0.8
● Full-scale value 1.1
Closing power of magnet coil at DC 4 W
Holding power of magnet coil at DC 4 W
Closing delay
● at DC 30 ... 100 ms
Opening delay
● at DC 7 ... 13 ms
Arcing time 10 ... 15 ms

Auxiliary circuit
Number of NC contacts for auxiliary contacts 2
● instantaneous contact 2
Number of NO contacts for auxiliary contacts 2
● instantaneous contact 2
Identification number and letter for switching 22 E
elements
Operating current at AC-12 maximum 10 A
Operating current at AC-15
● at 230 V rated value 10 A

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 ● at 400 V rated value 3 A
● at 500 V rated value 2 A
● at 690 V rated value 1 A
Operating current at 1 current path at DC-12
● at 24 V rated value 10 A
● at 110 V rated value 3 A
● at 220 V rated value 1 A
● at 440 V rated value 0.3 A
● at 600 V rated value 0.15 A
Operating current with 2 current paths in series at
DC-12
● at 24 V rated value 10 A
● at 60 V rated value 10 A
● at 110 V rated value 4 A
● at 220 V rated value 2 A
● at 440 V rated value 1.3 A
● at 600 V rated value 0.65 A
Operating current with 3 current paths in series at
DC-12
● at 24 V rated value 10 A
● at 60 V rated value 10 A
● at 110 V rated value 10 A
● at 220 V rated value 3.6 A
● at 440 V rated value 2.5 A
● at 600 V rated value 1.8 A
Operating frequency at DC-12 maximum 1 000 1/h
Operating current at 1 current path at DC-13
● at 24 V rated value 10 A
● at 110 V rated value 1 A
● at 220 V rated value 0.3 A
● at 440 V rated value 0.14 A
● at 600 V rated value 0.1 A
Operating current with 2 current paths in series at
DC-13
● at 24 V rated value 10 A
● at 60 V rated value 3.5 A
● at 110 V rated value 1.3 A
● at 220 V rated value 0.9 A
● at 440 V rated value 0.2 A
● at 600 V rated value 0.1 A
Operating current with 3 current paths in series at
DC-13

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 ● at 24 V rated value 10 A
● at 60 V rated value 4.7 A
● at 110 V rated value 3 A
● at 220 V rated value 1.2 A
● at 440 V rated value 0.5 A
● at 600 V rated value 0.26 A
Operating frequency at DC-13 maximum 1 000 1/h
Design of the miniature circuit breaker
● for short-circuit protection of the auxiliary circuit C characteristic: 6 A; 0.4 kA
up to 230 V
Contact reliability of auxiliary contacts 1 faulty switching per 100 million (17 V, 1 mA)

UL/CSA ratings
Contact rating of auxiliary contacts according to UL A600 / Q600

Short-circuit protection
Design of the fuse link
● for short-circuit protection of the auxiliary switch fuse gL/gG: 10 A
required

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 type screw and snap-on mounting onto 35 mm standard mounting rail
Height 57.5 mm
Width 45 mm
Depth 73 mm
Required spacing
● with side-by-side mounting
— forwards 10 mm
— upwards 10 mm
— downwards 10 mm
— at the side 0 mm
● for grounded parts
— forwards 10 mm
— upwards 10 mm
— at the side 6 mm
— downwards 10 mm
● for live parts
— forwards 10 mm
— upwards 10 mm
— downwards 10 mm
— at the side 6 mm

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 Connections/ Terminals
Type of electrical connection
● for auxiliary and control current circuit screw-type terminals
Type of connectable conductor cross-sections
● for auxiliary contacts
— single or multi-stranded 2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), 2x 4 mm²
— finely stranded with core end processing 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
● at AWG conductors for auxiliary contacts 2x (20 ... 16), 2x (18 ... 14), 2x 12

Safety related data

B10 value
● with high demand rate acc. to SN 31920 1 000 000; With 0.3 x Ie
Proportion of dangerous failures
● with low demand rate acc. to SN 31920 40 %
● with high demand rate acc. to SN 31920 73 %
Failure rate [FIT]
● with low demand rate acc. to SN 31920 100 FIT
Product function
● positively driven operation acc. to IEC 60947-5- Yes
1
T1 value for proof test interval or service life acc. to 20 y
IEC 61508

Certificates/ approvals

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 General Product Approval EMC
KC

Functional Declaration of Conformity Test Certificates

Safety/Safety
of Machinery
Type Examination Miscellaneous Type Test Certific- Special Test Certi- Miscellaneous
Certificate ates/Test Report ficate

Marine / Shipping

Marine / Ship- other

ping
Confirmation

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=3RH2122-1BB40
Cax online generator
http://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RH2122-1BB40
Service&Support (Manuals, Certificates, Characteristics, FAQs,...)
https://support.industry.siemens.com/cs/ww/en/ps/3RH2122-1BB40
Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)
http://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RH2122-1BB40&lang=en
Characteristic: Tripping characteristics, I²t, Let-through current
https://support.industry.siemens.com/cs/ww/en/ps/3RH2122-1BB40/char
Further characteristics (e.g. electrical endurance, switching frequency)
http://www.automation.siemens.com/bilddb/index.aspx?view=Search&mlfb=3RH2122-1BB40&objecttype=14&gridview=view1

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 45 73 35

1 3 NO 2 1 NC 3 1 NC 4 3 NO A1 +
5. 6. 7. 8.
29.8
57.5

50
5. 6. 7. 8.

1 4 NO 2 2 NC 3 2 NC 4 4 NO A2 -

5 1.2

3.8
5

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 1 3 NO 2 1 NC 3 1 NC 4 3 NO A1 +
5. 6. 7. 8.

5. 6. 7. 8.

1 4 NO 2 2 NC 3 2 NC 4 4 NO A2 -

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 A1 (+)

13

21

31

43
-K
A2 (-)

14

22

32

44

last modified: 04/07/2020

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