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Siemens Contactor Relays

October 10, 2019

Contactor relays are switching devices for control and auxiliary circuits and are used for controlling, signaling and locking switching devices and switchgear. The SIRIUS 3RH2 contactor relays come with standard-compliant connection designations and a connection system that saves both time and installation overhead. This makes them particularly suitable for practical applications.

3RH2 contactor relays and size S00 motor contactors are the same size and have an identical design – a significant advantage, particularly with regard to the accessories.

They are designed for AC or DC operation and are available with screw or spring-type terminals. The basic version of the contactor relays is a 4‑pole design which can be extended up to eight poles by means of snap-on auxiliary switch blocks.

Key Technical Benefits Bar.jpg

Technical data specific to Contactor relay, 6 NO + 2 NC, 125 V DC, Size S00, Ring cable lug connection, Captive auxiliary switch

Product brand name SIRIUS
Product designation Auxiliary contactor
Product type designation 3RH2
General technical data
Size of contactor S00
Product extension  
● Auxiliary switch No
Insulation voltage  
● with degree of pollution 3 rated value 690 V
Degree of pollution 3
Surge voltage resistance rated value 6 kV
Protection class IP  
● on the front IP00
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 10 000 000
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 125 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 6
● instantaneous contact 6
Identification number and letter for switching elements 62 E
Operating current at AC-12 maximum 10 A
Operating current at AC-15  
● at 230 V rated value 6 A
● 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 6 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  
● 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 up to 230 V C characteristic: 6 A; 0.4 kA
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 required fuse gL/gG: 10 A
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 117 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
Connections/ Terminals
Type of electrical connection  
● for auxiliary and control current circuit ring cable connection
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 60947-5-1 Yes
T1 value for proof test interval or service life acc. to IEC 61508 20 y
Certificates/ approvals
General Product Approval EMC

CCC

CSA

UL

KC

EAC

RCM

Functional Safety/Safety of Machinery Declaration of Conformity Test Certificates Marine / Shipping

Type Examination Certificate

EC/EU-Declaration of Conformity

Miscellaneous

Type Test Certificates/Test Report

Special Test Certificate

ABS (American Bureau of Shipping)

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https://support.industry.siemens.com/cs/pd/445960?pdti=td&dl=en&pnid=16187&lc=en-WW

https://mall.industry.siemens.com/mall/en/WW/Catalog/Products/8210404?tree=CatalogTree#More information

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