SIRIUS 3RT2 contactors/contactor assemblies 
  2.8 Technical data 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
243 
2.8.1.7  General data and short-circuit protection for 3RT202. contactors without overload relay 
Table 2- 84  General data - 3RT202. contactors 
Type  3RT2023  3RT2024  3RT2025  3RT2026  3RT2027  3RT2028 
Size  S0  S0  S0  S0  S0  S0 
General data 
Permissible 
mounting position 
  AC and DC operation 
The contactors are 
dimensioned for 
operation on a 
vertical mounting 
plane. 
 
rrr
 
 
Vertical mounting 
position: 
  AC and DC operation 
Special version required, also applies for coupling 
relays 3RT20.-.K40. 
  Basic device 
10 million 
  Basic device 
with snap-on 
auxiliary switch 
block 
10 million 
Mechanical durability 
  Solid-state 
compatible 
auxiliary switch 
block 
Opera-
ting 
cycles 
5 million 
Electrical durability 
1)
 
Rated insulation voltage U
i
 (pollution 
degree 3) 
V  690 
Rated impulse withstand voltage U
imp
 kW 6 
Protective separation between coil and 
main contacts (acc. to DIN EN 60947-1, 
Annex N) 
V  400 
Mirror contacts 
  A mirror contact is an auxiliary NC contact that 
cannot be closed simultaneously with a main 
NO contact. 
 
- 3RT20 2., 3RT23 2. (removable 
auxiliary switch block) 
Yes, in accordance with DIN EN 60947-4-1, Annex F.  
- 3RT20 2., 3RT23 2. (permanently 
mounted auxiliary switch block) 
Yes, in accordance with DIN EN 60947-4-1, Annex F. 
  Operation 
°C  -25 … + 60 Permissible ambient 
temperature 
  Storage 
°C  -55 … + 80