3RT1044-1AC20 (24v 50/60Hz Coil)
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Siemens Contactor 3RT1044-1AC20
Frame Size 3 65 amp 3-Pole 24v50/60Hz coil
3RT10 contactors, 3-pole, sizes S2 to S3
AC and DC operation
IEC 60947, EN 60947 (VDE 0660)
The 3RT1 contactors are climate-proof. They are finger-safe
according to EN 50274.
Size S00 & Size S0 contactors have an auxiliary contact integrated in the
basic unit. The basic units of sizes S2 to S3 contain only the
main current paths.
All basic units can be extended with auxiliary switch blocks.Contact reliability
If voltages ≤ 110 V and current ≤ 100 mA are to be switched,
the auxiliary contacts of the 3RT1 contactor or 3RH11 contactor
relay should be used as they guarantee a high level of contact
These auxiliary contacts are suitable for solid-state circuits with
currents ≥ 1 mA at a voltage of 17 V.
3RT1 contactors can be retrofitted with RC elements, varistors,
diodes or diode assemblies (assembly of diode and Zener diode
for short break times) for damping opening surges in the coil.
The surge suppressors are plugged onto the front of size S00
contactors. Space is provided for them next to a snap-on
auxiliary switch block.
For size S0 to S3 contactors, varistors and RC elements can be
snapped on either on the top or directly below the coil
terminals. Diode assemblies are available in 2 different versions
on account of their polarity. Depending on the application they
can be connected either only at the bottom (assembly with
motor starter protector) or only at the top (assembly with
The plug-in direction of the diodes and diode assemblies is
specified by coding.