Datasheet
Solid-State Switching Devices for Resistive Loads
Solid-State Relays
SIRIUS 3RF20 solid-state relays,
single-phase, 45 mm
4/71
Siemens IC 10 · 2011
4
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Overview
The solid-state relays with a width of 45 mm provide for connec-
tion of the power supply lead and the load from above. This
makes it easy to replace existing solid-state relays in existing ar-
rangements. The connection of the control cable also saves
space in much the same way as the 22.5 mm design, as it is sim-
ply plugged on.
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Technical specifications
1)
If two different conductor cross-sections are connected to one clamping
point, both cross-sections must lie in the range specified. If identical cross-
sections are used, this restriction does not apply.
Type 3RF20 ..-1.... 3RF20 ..-4....
Dimensions (W x H x D) mm
45 x 58 x 48 45 x 58 x 48
General data
Ambient temperature
• During operation, derating from 40 °C °C -25 ... +60
• During storage °C -55 ... +80
Installation altitude m0 ... 1000; derating from 1000
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
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
Connection type
Screw terminals Spring-type terminals
Connection, main contacts
• Conductor cross-sections
- Solid mm
2
2 x (1.5 ... 2.5)
1)
; 2 x (2.5 ... 6)
1)
--
- Finely stranded with end sleeve mm
2
2 x (1 ... 2.5)
1)
; 2 x (2.5 ... 6)
1)
; 1 x 10 --
- Solid or stranded, AWG cables
2x (AWG 14 ... 10) --
• Terminal screw
M4 --
• Tightening torque Nm
2 ... 2.5 --
lb.in
7 ... 10.3 --
Connection, auxiliary/control contacts
• Conductor cross-sections mm
2
1 x (0.5 ... 2.5), 2 x (0.5 ... 1.0),
AWG 20 ... 12
0.5 ... 2.5,
AWG 20 ... 12
• Stripped length mm
7 10
• Terminal screw
M3 --
• Tightening torque Nm
0.5 ... 0.6 --
lb.in
4.5 ... 5.3 --
W
H
D
© Siemens AG 2010