SIEMENS
SIEMENS 3RT20171BB41 IEC Magnetic Contactor 24V DC 3P 1NO
IEC magnetic contactor with 24 V DC coil, three poles and one normally-open auxiliary contact for DIN-rail or surface mounting
- Reliable 24V DC coil operation for consistent switching
- Handles 12A inductive and 22A resistive loads with IEC rating
- Compact 2.4 in height fits tight DIN rail spaces
- Screw terminals enable secure wiring without special tools
- Non-reversing 3-pole design with 1NO auxiliary contact for straightforward control
IEC Magnetic Contactor 24V DC 3P
The SIEMENS 3RT20171BB41 is a non-reversing IEC magnetic contactor designed for switching inductive loads up to 12 A and resistive loads up to 22 A. It operates on a 24 V DC coil and provides three main power poles plus one normally open auxiliary contact. The unit mounts on DIN rail or surface and uses screw terminals for wiring.
Replaces worn or undersized contactors
This contactor serves as a direct replacement for failed units in motor starter assemblies or control panels where a 24 V DC coil and three-pole switching are required. The jump is worth it when the existing contactor shows contact wear, coil failure, or cannot handle the 12 A inductive rating needed for the application.
Suits panel builders and maintenance teams
It fits applications needing a compact frame size S00 device with 2.4 in height and 2.3 in width for DIN rail mounting. Buyers who need reversing capability, a different coil voltage, additional auxiliary contacts, or a NEMA-rated enclosure should look at other models.
Highlights
- Reliable 24V DC coil operation for consistent switching
- Handles 12A inductive and 22A resistive loads with IEC rating
- Compact 2.4 in height fits tight DIN rail spaces
- Screw terminals enable secure wiring without special tools
- Non-reversing 3-pole design with 1NO auxiliary contact for straightforward control
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
What DIN rail width and overall dimensions does the 3RT20171BB41 contactor require?
The contactor is 2.4 in high and 2.3 in wide and mounts on a standard DIN rail or can be surface mounted using integral mounting feet.
How is the coil wired on this 24V DC contactor and what mistake should be avoided?
Connect the 24V DC supply to terminals A1 and A2; the common error is applying AC voltage to the DC coil.
When should the main contacts be inspected or replaced on a 12 A inductive load?
Inspect the three main poles after the rated electrical life for 12 A inductive duty; replace if contact erosion or overheating is evident.
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