SIEMENS
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Siemens IC 10 · 2017
Solid-State Switching Devices for Resistive/Inductive Loads
Solid-State Relays
SIRIUS 3RF21 solid-state relays, single-phase, 22.5 mm
6
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Overview
Single-phase solid-state relays (without heat sink) with a width of 22.5 mm
With its compact design and a width of just 22.5 mm, which is
not exceeded even for currents of up to 88 A, the 3RF21 solid-
state relay offers an ultra-small footprint. The logical connection
method, with the power infeed from above and load connection
from below, ensures tidy installation in the control cabinet.
■
Technical specifications
1)
If two different conductor cross-sections are connected to one clamping
point, both cross-sections must lie in one of the ranges specified.
More information
System Manual and Manual,
see
FAQs,
Type
3RF21..-1
....
3RF21..-2
....
3RF21..-3
....
Dimensions (W x H x D)
mm
22.5 x 85 x 48 mm
22.5 x 85 x 48 mm
22.5 x 85 x 48 mm
General data
Ambient temperature
• During operation, derating from 40 °C
°C
-25 ... + 60
• During storage
°C
-55 ... + 80
Installation altitude
m
0 ... 1 000; derating from 1 000
Shock resistance
acc. to IEC 60068-2-27
g
/ms
15/11
Vibration resistance
acc. to IEC 60068-2-6
g
2
Degree of protection
IP20
IP00 (IP20 when using the
terminal cover
3RA2900-3PA88)
Electromagnetic compatibility
(EMC)
• Emitted interference
-
Conducted interference voltage
acc. to IEC 60947-4-3
Class A for industrial applications
-
Emitted, high-frequency interference voltage
acc. to IEC 60947-4-3
Class B for residential, business and commercial applications
• Interference immunity
-
Electrostatic discharge
acc. to IEC 61000-4-2
(corresponds to degree of severity 3)
kV
Contact discharge 4; air discharge 8; behavior criterion 2
-
Induced RF fields
acc. to IEC 61000-4-6
MHz
0.15 ... 80; 140 dBμV; behavior criterion 1
-
Burst acc. to IEC 61000-4-4
kV
2/5.0 kHz; behavior criterion 2
-
Surge acc. to IEC 61000-4-5
kV
Conductor - ground 2; conductor - conductor 1; behavior criterion 2
Mounting
• Screws (not included in the scope of supply)
2 x M4
• Tightening torque
Nm
1.5
Connection type
Screw terminals
Spring-type terminals
Ring terminal lug
connection
Connection, main contacts
• Conductor cross-sections
- Solid
mm
2
2 x (1.5 ... 2.5)
1)
, 2 x (2.5 ... 6)
1)
2 x (0.5 ... 2.5)
--
-
Finely stranded with end sleeve
mm
2
2 x (1 ... 2.5)
1)
; 2 x (2.5 ... 6)
1)
1 x 10
2 x (0.5 ... 1.5)
--
-
Finely stranded without end sleeve
mm
2
--
2 x (0.5 ... 2.5)
--
-
Solid or stranded, AWG cables
2 x (AWG 14 ... 10)
2 x (AWG 18 ... 14)
--
• Terminal screws
M4
--
M5
• Tightening torques
Nm
2 ... 2.5
--
2.5 ... 2
lb.in
7 ... 10.3
--
10.3 ... 7
• Cable lugs
--
--
-
According to DIN 46234
5-2.5, 5-6, 5-10, 5-16, 5-25
-
According to JIS C 2805
R 2-5, R 5.5-5, R 8-5, R 14-5
-
Width, maximum
mm
12
Connection, auxiliary/control contacts
• Conductor cross-sections
mm
AWG
1 x (0.5 ... 2.5), 2 x (0.5 ... 1.0)
20 ... 12
0.5 ... 2.5
20 ... 12
1 x (0.5 ... 2.5), 2 x (0.5 ... 1.0)
20 ... 12
• Stripped length
mm
7
10
7
• Terminal screw
M3
--
M3
• Tightening torques
Nm
0.5 ... 0.6
--
0.5 ... 0.6
lb.in
4.5 ... 5.3
--
4.5 ... 5.3
W
H
D
© Siemens AG 2016