Article number 3RQ3018-2AB00 3RQ4018-2AB00
!!! phased-out product !!! the preferred successor is 3RQ4018-2AB00 output coupler relay coupler, 1 change-over contact 24 V AC/DC width 6.2 mm spring-loaded terminal (push-in) thermal current 6 A output coupler with integrated relay, 24 V AC/DC, 1 change-over contact, spring-loaded terminal (push-in), width 6.2 mm, thermal current 6 A
product brand name SIRIUS
product category SIRIUS 3RQ3 coupling relays in slim design SIRIUS 3RQ4 coupling relay, narrow design
product designation Coupling relays with relay output (not plug-in) Coupling relay with integrated relay output
design of the product Output coupling link output coupling link
product type designation 3RQ3 3RQ4
General technical data
display version LED Yes
product feature protective coating on printed-circuit board No No
product component
● relay output Yes
● semi-conductor output No
consumed active power 0.3 W
insulation voltage for overvoltage category III according to IEC 60664 with degree of pollution 3 rated value 300 V
type of voltage of the operating voltage AC/DC
● for actuation AC/DC
surge voltage resistance rated value 4 kV
maximum permissible voltage for protective separation
● between control and auxiliary circuit 300 V
percental drop-out voltage related to the input voltage 10 %
flammability class of enclosure material UL94 V-0
shock resistance
● according to IEC 60068-2-27 sinusoidal half-wave 15g / 11 ms
vibration resistance
● according to IEC 60068-2-6 6 ... 150 Hz: 2 g
operating frequency maximum 72 000 1/h
switching behavior monostable
mechanical service life (operating cycles) typical 10 000 000
thermal current 6 A
reference code according to IEC 81346-2 K
Substance Prohibitance (Date) 03/25/2015 09/26/2024
Net Weight 0.034 kg 0.035 kg
Control circuit/ Control
control supply voltage at AC
● at 50 Hz rated value 24 V
● at 50 Hz rated value 110 ... 230 V
● at 60 Hz rated value 24 V
● at 60 Hz rated value 110 ... 230 V
control supply voltage frequency
● 1 rated value 50 Hz
● 2 rated value 60 Hz
control supply voltage at DC rated value 24 V
control supply voltage at DC rated value 110 ... 230 V
operating range factor control supply voltage rated value at DC
● initial value 0.8 0.85
● full-scale value 1.25
operating range factor control supply voltage rated value at AC at 50 Hz
● initial value 0.8
● full-scale value 1.25
operating range factor control supply voltage rated value at AC at 60 Hz
● initial value 0.8
● full-scale value 1.25
ON-delay time
● at AC maximum 12 ms 10 ms
● at DC maximum 12 ms 10 ms
OFF-delay time maximum 14 ms 10 ms
Mechanical data
product component plug-in socket No
design of the relay operating mechanism poled
Short-circuit protection
design of the fuse link for short-circuit protection of the auxiliary switch required fuse gG: 4 A
Auxiliary circuit
type of switching contact Changeover contact
material of switching contacts AgSnO2 Silver tin oxide (AgSnO2)
number of NC contacts for auxiliary contacts 0
number of NO contacts for auxiliary contacts 0
number of CO contacts for auxiliary contacts 1
operational current of auxiliary contacts at AC-15
● at 24 V 3 A
● at 250 V 3 A
operational current of auxiliary contacts at DC-13
● at 24 V 1 A
● at 125 V 0.2 A
● at 250 V 0.1 A
contact reliability of auxiliary contacts one incorrect switching operation of 100 million switching operations (17 V, 5 mA)
Main circuit
type of voltage AC/DC
Inputs/ Outputs
property of the output short-circuit proof No
ampacity of the output relay at AC-15 at 250 V at 50/60 Hz 3 A
ampacity of the output relay at DC-13
● at 24 V 1 A
● at 125 V 0.2 A
● at 250 V 0.1 A
Electromagnetic compatibility
EMC emitted interference according to IEC 60947-1 ambience A (industrial sector)
EMC immunity according to IEC 60947-1 corresponds to degree of severity 3
conducted interference
● due to burst according to IEC 61000-4-4 2 kV
● due to conductor-earth surge according to IEC 61000-4-5 2 kV
● due to conductor-conductor surge according to IEC 61000-4-5 1 kV
field-based interference according to IEC 61000-4-3 10 V/m
electrostatic discharge according to IEC 61000-4-2 6 kV contact discharge / 8 kV air discharge
Display
display version as status display by LED LED green
Safety related data
B10d value 600 000
Connections/ Terminals
product function removable terminal No
type of electrical connection spring-loaded terminals
● for auxiliary and control circuit spring-loaded terminals (push-in) spring-loaded terminals
wire length
● at AC maximum 500 m
● at DC maximum 1 000 m
type of connectable conductor cross-sections
● solid 1x (0.25 ... 2.5 mm²)
● finely stranded with core end processing 1x (0.25 ... 1.5 mm²)
● finely stranded without core end processing 1x (0.25 ... 2.5 mm²)
● for AWG cables solid 1x (20 ... 14)
● for AWG cables stranded 1x (20 ... 14)
connectable conductor cross-section
● solid 0.25 ... 2.5 mm²
● finely stranded with core end processing 0.25 ... 1.5 mm²
● finely stranded without core end processing 0.25 ... 2.5 mm²
AWG number as coded connectable conductor cross section
● solid 20 ... 14
● stranded 20 ... 14
Installation/ mounting/ dimensions
mounting position any
fastening method snap-on mounting
height 93 mm
width 6.2 mm
depth 72.5 mm 84.5 mm
required spacing
● with side-by-side mounting
— forwards 0 mm
— backwards 0 mm
— upwards 0 mm
— downwards 0 mm
— at the side 0 mm
● for grounded parts
— forwards 0 mm
— backwards 0 mm
— upwards 0 mm
— at the side 0 mm
— downwards 0 mm
● for live parts
— forwards 0 mm
— backwards 0 mm
— upwards 0 mm
— downwards 0 mm
— at the side 0 mm
Ambient conditions
installation altitude at height above sea level maximum 2 000 m
ambient temperature
● during operation -25 ... +60 °C
● during storage -40 ... +85 °C
● during transport -40 ... +85 °C
relative humidity during operation 10 ... 95 %
Approvals Certificates
General Product Approval
CCC CCC
Yes Yes
CSA CSA
Yes Yes
EU declaration of conformity EU declaration of conformity Yes Yes
UK Declaration of Conformity UK Declaration of Conformity
Yes Yes
UL UL
Yes Yes
EAC EAC
Yes Yes
EMV
RCM RCM
Yes Yes
KC Yes Yes
Test Certificates
Type Test Certificates/Test Report Yes Yes
Maritime application
DNV (Det Norske Veritas) DNV (Det Norske Veritas) Yes Yes
other
Chinese Quality Checkmark Chinese Quality Checkmark Yes Yes
Confirmation Yes Yes
Environment
Environmental Confirmations Yes Yes
Further information
Information on the packaging
Information for data generation and storage
Information- and Downloadcenter (Catalogs, Brochures,…)
Industry Mall (Online ordering system)
Cax online generator
Service&Support (Manuals, Certificates, Characteristics, FAQs,...)
Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)
3RQ3018-2AB00 3RQ4018-2AB00
3RQ3018-2AB00 3RQ4018-2AB00
3RQ3018-2AB00 3RQ4018-2AB00
3RQ3018-2AB00 3RQ4018-2AB00
last modified: 10/27/2025
Date
12/1/2025
Subject to change without notice
© Copyright Siemens 2025