SIEMENS
4/81
Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate.
Contactors for Special Applications
3TC contactors for switching DC voltage, 1-pole and 2-pole
4
1)
Permissible load for DC-1 utilization category:
see detailed technical specifications in the reference manual
"Switching Devices – Contactors and Contactor Assemblies",
.
2)
The fitting of auxiliary switches cannot be altered on DC-operated
contactors.
3)
Upper operating range limit at 230 V AC: 1.14 x
U
s
.
Other rated control supply voltages
according to page 4/82
on
request.
For spare parts,
see page 4/84
.
3TC74
3TC78
Size
Utiliza-
tion cate-
gory
1)
Opera-
tional
cur-
rent
I
e
Ratings of
DC motors at
Auxiliary
con-
tacts
2)
Rated con-
trol supply
voltage
U
s
SD
Screw
terminals
PU
(UNIT,
SET,
M)
PS*
PG
110 V
220 V
440 V
600 V
750 V
1 200 V
1 500 V
Version
Article No.
Price
per PU
A
kW
kW
kW
kW
kW
kW
kW
NO
NC
V
d
3TC74 1-pole contactors · Operational voltage up to 750 V
DC operation
Terminal designations acc. to EN 50005
12
DC-3,
DC-5
400
35
70
140
200
250
--
--
4
4
24 DC
15
3TC7414-0EB
1
1 unit
41B
110 DC
15
3TC7414-0EF
1
1 unit
41B
AC operation, 50 Hz
Terminal designations acc. to EN 50005
12
DC-3,
DC-5
400
35
70
140
200
250
--
--
4
4
230/220 AC
3)
15
3TC7414-1CM
1
1 unit
41B
3TC78 2-pole contactors · Operational voltage up to 1 500 V
DC operation
Terminal designations acc. to EN 50005
12
DC-3,
DC-5
400
35
70
140
200
250
400
500
4
4
24 DC
15
3TC7814-0EB
1
1 unit
41B
110 DC
15
3TC7814-0EF
1
1 unit
41B
AC operation, 50 Hz
Terminal designations acc. to EN 50005
12
DC-3,
DC-5
400
35
70
140
200
250
400
500
4
4
230/220 AC
3)
15
3TC7814-1CM
1
1 unit
41B
84
83
72
71
62
61
54
53
44
43
32
31
22
21
A1
A2
2/T1 14
13
1/L1
Z
~A1
~A2
84
83
72
71
62
61
54
53
44
43
32
31
22
21
14
13
2/T1
1/L1
4/T4
3/L2
84
83
72
71
62
61
54
53
44
43
32
31
22
21
14
13
A1
A2
2/T1
1/L1
4/T2
3/L2
Z
~A1
~A2
84
83
72
71
62
61
54
53
44
43
32
31
22
21
14
13
2/T1
1/L1
© Siemens AG 2016