SIEMENS
SIEMENS 3RT20161BB42 Contactor 24V DC 3P 9A 1NC
Controls three-phase circuits up to 9 A inductive load with a 24 V DC coil and one normally-closed auxiliary contact
- Reliable switching for 9 A inductive loads
- 24 V DC coil fits standard control circuits
- Three-pole design handles three-phase motor control
- Single NC auxiliary contact simplifies status feedback
- DIN-rail or surface mounting suits compact panels
SIEMENS SIRIUS 3RT20 Contactor 24V DC
This SIEMENS SIRIUS 3RT20 contactor is a three-pole IEC magnetic starter rated for 9 A inductive and 22 A resistive loads. It suits control panels and machine builders who need a compact non-reversing switch for motor or heating circuits.
DIN rail mount with screw terminals
The unit mounts on DIN rail or a flat surface and uses screw terminals for wiring. Its frame size S00 keeps the footprint to 2 in wide by 2.4 in high, and the 24 V DC coil draws minimal power during normal operation.
Single normally-closed auxiliary contact
The built-in 1NC auxiliary contact provides one status or interlock signal without extra accessories. Buyers who need additional auxiliary poles or a normally-open contact must select a different contactor variant.
Highlights
- Reliable switching for 9 A inductive loads
- 24 V DC coil fits standard control circuits
- Three-pole design handles three-phase motor control
- Single NC auxiliary contact simplifies status feedback
- DIN-rail or surface mounting suits compact panels
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
How do I mount the SIRIUS 3RT20 contactor on a DIN rail and what step is often missed?
Clip the unit onto the rail until the latch engages, then tighten the screw terminals to the specified torque before energising the 24 V DC coil.
What maintenance will the 1NC auxiliary contact need over time?
Inspect the contact tips for erosion after high-cycle operation and replace the contactor if the 9 A inductive rating can no longer be broken cleanly.
Which limit appears first when the contactor runs continuously at full load?
The 9 A inductive full-load current defines the thermal boundary; sustained operation above this value will trip the overload protection first.
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