SIEMENS
4/55
Siemens IC 10 · 2017
Contactors for Special Applications
3TK20 miniature contactors for resistive loads (AC-1), 4-pole
4
1)
Applies to 50/60 Hz coil:
At 50 Hz, 1.1 x
U
s
,
with side-by-side mounting and 100 % ON period the
max. ambient temperature is +40 °C.
2)
According to excerpt from IEC 60947-4-1:
-
Type of coordination "1"
Destruction of the contactor and the overload relay is permissible.
The contactor and/or overload relay can be replaced if necessary.
-
Type of coordination "2"
The overload relay must not suffer any damage. Contact welding on
the contactor is permissible, however, if the contacts can be easily
separated.
3)
A short-circuit current of
I
q
6 kA applies to type of coordination "2".
Type
3TK20
Size
00
General data
Dimensions (W x H x D)
mm
45 x 48 x 63
Permissible mounting position
AC and DC operation
Any
Mechanical endurance
• AC operation
Operat-
ing cy-
cles
10 million
• DC operation
30 million
• Auxiliary switch block
10 million
Rated insulation voltage
U
i
(Pollution degree 3)
• Screw terminals
V
690
• Plug-type terminal 6.3 mm x 0.8 mm
V
500
• Solder pin connections
V
500
Rated impulse withstand voltage
U
imp
(Pollution degree 3)
• Screw terminals
kV
6
• Plug-type terminal 6.3 mm x 0.8 mm
kV
6
• Solder pin connections
kV
6
Protective separation
between coil and main contacts
According to IEC 60947-1, Appendix N
V
Up to 300
Permissible ambient temperature
1)
• During operation
°C
-25 ... +55
• During storage
°C
-55 ... +80
Degree of protection
acc. to IEC 60529
• On front
IP20 (with screw terminals)
• Connecting terminal
IP20 (with screw terminals)
Touch protection
acc. to IEC 60529
Finger-safe (for screw terminals)
Shock resistance
• Rectangular pulse
-
AC operation
g
/ms
8.3/5 and 5.2/10
-
DC operation
g
/ms
11.3/5 and 9.2/10
• Sine pulse
-
AC operation
g
/ms
13/5 and 8/10
-
DC operation
g
/ms
17.4/5 and 12.9/10
Short-circuit protection
Main circuit
2)
• Fuse links, operational class gG:
LV HRC, type 3NA; DIAZED, type 5SB; NEOZED, type 5SE
acc. to IEC 60947-4-1/EN 60947-4-1
-
Type of coordination "1"
A
25
-
Type of coordination "2"
3)
A
10
- Weld-free
A
10
• Miniature circuit breaker with C characteristic
A
10
Auxiliary circuit
Short-circuit test
• With fuse links of operational class gG:
DIAZED, type 5SB; NEOZED, type 5SE
with short-circuit current
I
k
= 1 kA acc. to IEC 60947-5-1
A
6
W
H
D
© Siemens AG 2016