3RT, 3RH, 3TB, 3TC, 3TH, 3TK Contactors for Special Applications
3TC Contactors for Switching DC Voltage
1- and 2-pole, 32 ... 400 A
3TC74
Size
Rated data
DC-3 and DC-5
1)
3TC78
Auxiliary Rated control DT Order No.
contacts
2)
supply
voltage
U
s
Price
per PU
PU
PS*
(UNIT,
SET, M)
Ratings of DC motors at
Opera-
tional
current
I
e
110 V 220 V 440 V 600 V 750 V 1200 V 1500 V
A
kW
kW
kW
kW
kW
kW
kW
NO
NC V
kg
3TC74 1-pole contactors
¼
Operating voltage up to 750 V
DC operation
12
400
35
70
140
200
250
--
--
4
4
24 DC
110 DC
C
C
3TC74 14-0EB
3TC74 14-0EF
3TC74 14-1CM
1 1 unit 101 10.728
1 1 unit 101 10.660
1 1 unit 101 10.850
AC operation, 50 Hz
12
400
35
70
140
200
250
--
--
4
4
230 / 220 AC
3)
C
3TC78 2-pole contactors
¼
Operating voltage up to 1500 V
DC operation
12
400
35
70
140
200
250
400
500
4
4
24 DC
110 DC
C
C
3TC78 14-0EB
3TC78 14-0EF
3TC78 14-1CM
1 1 unit 101 22.500
1 1 unit 101 15.960
1 1 unit 101 23.824
AC operation, 50 Hz
12
400
35
70
140
200
250
400
500
4
4
230 / 220 AC
3)
C
For more rated control supply voltages U
s
, see below.
For spare parts, see page 3/144.
1) For the permissible load for utilization category DC-1,
see Technical Specifications.
2) The auxiliary switch complement cannot be altered on DC-operated
contactors.
3) Upper operating range limit at 230 V: 1.14 x
U
s
.
Contactor type
Rated control supply voltage
U
s
3TC44
3TC48
3TC52/56
3TC74/78
Rated control supply voltages (the 10th and 11th position of the order number must be changed)
AC operation · Coils for 50 Hz
24 V AC
110 V AC
230/220 V AC
240 V AC
B0
F0
P0
1)
U0
C2
G2
K2
N2
L2
B4
W4
E4
F4
G4
M4
P4
B0
F0
P0
1)
U0
--
--
--
--
--
B4
W4
E4
F4
G4
M4
P4
--
F0
P0
1)
--
--
--
--
--
--
B4
--
--
F4
--
M4
--
--
--
M
2)
--
--
--
--
--
--
B
--
--
F
--
M
--
AC operation · Coils for 50/60 Hz
24 V AC
110 V AC
120 V AC
220 V AC
230 V AC
DC operation
24 V DC
48 V DC
60 V DC
110 V DC
125 V DC
220 V DC
230 V DC
1) Coil operating range at 220 V or 380 V: 0.85 to 1.15 x
U
s
;
lower operating range limit according to IEC 60947.
2) Upper operating range limit at 230 V: 1.14 x
U
s
.
* You can order this quantity or a multiple thereof.
Siemens LV 1 · 2006
3/77
3
PG
Weight
per PU
approx.
SIEMENS [ Siemens Semiconductor Group ]
