SIEMENS
SIEMENS 3RT20151AB02 Contactor 24V AC 3P 1NC
A 3-pole non-reversing IEC magnetic contactor with a 24 V AC coil, 7 A inductive and 18 A resistive ratings, one NC auxiliary contact, and DIN-rail or surface mounting in an IP20 enclosure
- 3-pole main contacts switch power reliably
- 24 V AC coil fits standard control circuits
- 1 NC auxiliary contact enables interlock logic
- IP20 open design suits panel integration
- Rated 7 A inductive and 18 A resistive
SIEMENS 3RT20151AB02 Contactor
The SIEMENS 3RT20151AB02 is a 3-pole IEC magnetic contactor with a 24 V AC coil and one normally closed auxiliary contact. It belongs to the SIRIUS 3RT20 family in frame size S00 and mounts vertically on DIN rail or a surface. The unit provides IP20 protection without an enclosure and uses screw terminals for electrical connection. It is designed for non-reversing motor control in industrial automation panels.
Replaces worn 3-pole contactors
This contactor replaces a failed or aged 3-pole unit that uses a 24 V AC coil and requires a single NC auxiliary contact for interlocking or signalling. The jump is worth it when the existing device shows contact erosion, coil hum or unreliable switching at 50/60 Hz. It fits the same S00 footprint and DIN rail mounting, so panel layout and wiring remain unchanged during the swap.
Sustained load behaviour
Under continuous operation the contactor handles inductive loads up to 7 A and resistive loads up to 18 A at a maximum of 690 V AC. The electromagnetic coil maintains stable actuation during extended duty cycles at the rated 24 V AC. Typical power dissipation stays within the device's operational parameters, and the IP20 rating protects live parts during prolonged use in a vertical mounting orientation.
Highlights
- 3-pole main contacts switch power reliably
- 24 V AC coil fits standard control circuits
- 1 NC auxiliary contact enables interlock logic
- IP20 open design suits panel integration
- Rated 7 A inductive and 18 A resistive
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
Will the 3RT20151AB02 fit on a standard DIN rail?
Yes, the contactor is designed for DIN rail mounting and also supports surface mounting in a vertical orientation.
How is the 24 V AC coil wired during installation?
Connect the control circuit to the screw terminals marked for the coil; a common error is reversing the line and neutral wires on the AC coil.
When should the auxiliary NC contact be replaced?
The 1 NC auxiliary contact is built into the unit and not separately replaceable; replace the whole contactor if the auxiliary contact shows wear or fails to switch.
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