SIEMENS
SIEMENS 3RT23171BB40 IEC Magnetic Contactor 4NO 24V DC 4P Non-Reversing
A four-pole IEC magnetic contactor with 24 V DC coil, non-reversing action, four normally open auxiliary contacts, screw terminals, and DIN rail or surface mounting
- 24 V DC coil enables low-voltage control
- Four normally open main contacts switch three-phase loads
- Four auxiliary NO contacts provide status feedback
- Screw terminals allow secure wiring without special tools
- DIN-rail and surface mounting fit standard panels
SIRIUS 3RT23 Four-Pole Contactor
The Siemens SIRIUS 3RT23 contactor provides four normally open main contacts and four normally open auxiliary contacts in a single frame S00 unit. It operates on a 24 V DC coil and is designed for non-reversing switching applications in industrial control panels.
Coil Voltage and Terminal Compatibility
Verify that your control circuit supplies 24 V DC to match the coil rating before installation. The device uses screw terminals for all connections and mounts on a standard DIN rail or directly on a surface in a vertical position.
Open-Frame Thermal Performance
With no enclosure and an IP20 rating, the contactor relies on natural convection within the cabinet for cooling during normal operation. The open-frame design keeps acoustic noise minimal while the 24 V DC coil maintains low steady-state power draw.
Highlights
- 24 V DC coil enables low-voltage control
- Four normally open main contacts switch three-phase loads
- Four auxiliary NO contacts provide status feedback
- Screw terminals allow secure wiring without special tools
- DIN-rail and surface mounting fit standard panels
Specifications
| Brand | SIEMENS |
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Questions about this item
Does the contactor ship with any cables, DIN rail clips or mounting screws, or do I need to source those separately?
The unit is supplied as the contactor only; DIN rail clips and mounting screws are not included and must be purchased separately.
Which coil voltage and pole configuration should I select for a 24 V DC control circuit that switches three-phase loads?
Choose the 24 V DC coil version with 4 NO main poles, which matches a three-phase circuit plus a neutral or auxiliary path.
What does the IP20 rating mean once the contactor is installed on a DIN rail inside a panel?
IP20 indicates finger-safe terminals; the device is protected against solid objects over 12 mm but not against water ingress.
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