Datasheet
Solid-State Switching Devices for Resistive Loads
Solid-State Relays
SIRIUS 3RF20 solid-state relays,
single-phase, 45 mm
4/72
Siemens IC 10 · 2011
4
1)
I
max
provides information about the performance of the solid-state relay.
The actual permitted rated operational current I
e
can be smaller depend-
ing on the connection method and cooling conditions.
Note:
The required heat sinks for the corresponding load currents can
be determined from the characteristic curves (see note on
Technical Information, page 4/1). The minimum thickness values
for the mounting surface must be observed.
1)
Only for zero-point-switching devices.
Circuit diagrams
Order No. I
max
1)
I
e
acc. to IEC 60947-4-3 I
e
acc. to UL/CSA Power loss
at I
max
Minimum load
current
Leakage current
at R
thha
/T
u
= 40 °C at R
thha
/T
u
= 40 °C at R
thha
/T
u
= 50 °C
AK/WAK/WAK/WW A mA
Main circuit
3RF20 20-1.A.. 20 2.0 20 1.7 20 1.3 28.6 0.1 10
3RF20 30-1.A..
30 1.1 30 0.79 30 0.56 44.2 0.5 10
3RF20 50-1.A..
50 0.68 50 0.48 50 0.33 66 0.5 10
3RF20 70-1.A..
70 0.40 50 0.77 50 0.6 94 0.5 10
3RF20 90-1.A..
88 0.33 50 0.94 50 0.85 118 0.5 10
Order No. Rated impulse withstand capacity I
tsm
I
2
t value
AA²s
Main circuit
3RF20 20-1.A.. 200 200
3RF20 30-1.A.2
300 450
3RF20 30-1.A.4
300 450
3RF20 30-1.A.6
400 800
3RF20 50-1.A..
600 1800
3RF20 70-1.A.2
1200 7200
3RF20 70-1.A.4
1200 7200
3RF20 70-1.A.5
1200 7200
3RF20 70-1.A.6
1150 6600
3RF20 90-1.A..
1150 6600
Type 3RF20 .0-1.A.2 3RF20 .0-1.A.4 3RF20 .0-1.A.5 3RF20 .0-1.A.6
Main circuit
Rated operational voltage U
e
V AC 24 ... 230 48 ... 460 48 ... 600 48 ... 600
• Operating range V AC
20 ... 253 40 ... 506 40 ... 660 40 ... 660
• Rated frequency Hz
50/60 ± 10 %
Rated insulation voltage U
i
V 600
Blocking voltage V 800 1200 1600
Rage of voltage rise V/μs
1000
Type 3RF20 .0-1.A0. 3RF20 .0-1.A2. 3RF20 .0-1.A4.
Control circuit
Method of operation DC operation AC operation DC operation
Rated control supply voltage U
S
V 24 acc. to EN 61131-2 110 … 230 4 … 30
Rated frequency
of the control supply voltage
Hz
-- 50/60 ± 10 % --
Control supply voltage, max. V
30 253 30
Typical actuating current mA
20 15 20
Response voltage V
15 90 4
Drop-out voltage V
5 40 1
Operating times
• ON-delay ms 1 + max. one half-wave
1)
40 + max. one half-wave
1)
1 + max. one half-wave
1)
• OFF-delay ms 1 + max. one half-wave 40 + max. one half-wave 1 + max. one half-wave
DC control supply voltage AC control supply voltage
A1 +
A2 -
1L
2T
NSB0_01462
A1
A2
1L
2T
NSB0_01463
© Siemens AG 2010