SIEMENS
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Siemens IC 10 · 2017
Contactors for Special Applications
3TK20 miniature contactors for resistive loads (AC-1), 4-pole
4
Type
3TK20. .-0. . .
3TK20. .-3. . .,
3TK20. .-6. . .,
3TK20. .-7. . .
Size
00
Main circuit
Load rating with AC
Utilization category AC-1, switching resistive loads
• Rated operational current
I
e
(at 40 °C)
Up to 400/380 V
A
18
690/660 V
A
18
--
• Rated operational current
I
e
(at 55 °C)
400/380 V
A
16
690/660 V
A
16
--
• Rated power of AC loads
with p.f. = 1
At 230/220 V
kW
6.0
400/380 V
kW
10
500 V
kW
13
690/660 V
kW
17
--
• Minimum conductor cross-section for loads with
I
e
mm
2
2.5
Utilization categories AC-2 and AC-3
• Rated operational current
I
e
Up to 220 V
A
9.0
230 V
A
9.0
380 V
A
9.0
400 V
A
8.4
500 V
A
6.5
660 V
A
5.2
--
690 V
A
5.2
--
• Rated power for motors
with slipring or squirrel cage
At 50 and 60 Hz
At 110 V
kW
1.2
115 V
kW
1.2
120 V
kW
1.3
127 V
kW
1.4
200 V
kW
2.2
220 V
kW
2.4
230 V
kW
2.5
240 V
kW
2.6
380 V
kW
4.0
400 V
kW
4.0
415 V
kW
4.0
440 V
kW
4.0
460 V
kW
4.0
500 V
kW
4.0
575 V
kW
4.0
--
660 V
kW
4.0
--
690 V
kW
4.0
--
• Power loss per conducting path
At
I
e
/AC-3
W
0.3
Utilization category AC-4
(Contact endurance approx. 200 000 operating cycles at
I
a
= 6 x
I
e
)
• Rated operational current
I
e
Up to 400 V
A
2.6
690 V
A
1.8
--
• Rated power for motors with squirrel cage
At 50 and 60 Hz
At 110 V
kW
0.32
115 V
kW
0.33
120 V
kW
0.35
• Max. permissible rated operational current
I
e
/AC-4
r
I
e
/AC-3 up to 500 V, for reduced contact
endurance and reduced switching frequency.
127 V
kW
0.37
200 V
kW
0.58
220 V
kW
0.64
230 V
kW
0.67
240 V
kW
0.70
380 V
kW
1.10
400 V
kW
1.15
415 V
kW
1.20
440 V
kW
1.27
460 V
kW
1.33
500 V
kW
1.45
575 V
kW
1.30
--
660 V
kW
1.10
--
690 V
kW
1.15
--
© Siemens AG 2016