Siemens 3RT20171AB01 Contactor
Key Specifications
| Parameter | Value |
|---|---|
| Base Product Number | 3RT2017 |
| Contact Form | 3PST-NO (3 Form A) |
| Contact Rating | 12 A |
| Coil Voltage | 24 VAC |
| Coil Power | 37 VA |
| Must Operate Voltage | 20.4 VAC |
| Operate Time | 33 ms |
| Mounting | Chassis Mount, DIN Rail |
| Operating Temperature | 25°C ~ 60°C |
| Encapsulation | Bulk |
| Features | Auxiliary Contacts |
The 3RT20171AB01 is a Siemens S00-size electromechanical contactor in the 3RT2 family, rated 12 A per pole with a 24 VAC control coil and one integrated auxiliary contact (normally open). It ships in bulk packaging.
Family Context
The 3RT2017 series uses a structured MPN format where the prefix 3RT20 identifies the series and frame size, followed by coil voltage and auxiliary contact type codes. The suffix "AB01" denotes the 24 VAC coil and 1NO auxiliary configuration. Series siblings span 42 VAC to 400 VAC coil options, allowing selection for different control system voltages within the same physical footprint.
Similar Catalog Parts
The table below shows shared specification values for the primary part and the two highest-similarity alternates.
| Parameter | 3RT20171AB01 | 3RT20171AB011AA0 | 3RT20171AB02 |
|---|---|---|---|
| Contact Rating | 12 A | 12 A | 12 A |
| Contact Form | 3PST-NO | 3PST-NO | 3PST-NO |
| Coil Voltage | 24 VAC | 24 VAC | 24 VAC |
| Mounting Type | Chassis, DIN Rail | Chassis, DIN Rail | Chassis, DIN Rail |
| Operating Temperature | 25°C ~ 60°C | 25°C ~ 60°C | 25°C ~ 60°C |
| Similarity | — | 1.0 | 1.0 |
All three contactors share the same 12 A rating, three-pole NO configuration, 24 VAC coil, and mounting style. The primary difference between the bulk and boxed versions lies in packaging quantity.
Why these are similar: All three are S00 frame members of the same base series with identical contact current and voltage ratings. The AB01 and AB02 differ in auxiliary contact state (1NO vs. 1NC). The AB011AA0 variant carries the same ratings in a boxed package versus the bulk-packed primary part.
Engineering Verification Checklist
- Control circuit nominal voltage matches coil rating (24 VAC here)
- Must-operate voltage (20.4 VAC) is compatible with available control voltage tolerance
- 12 A per-pole rating suits the targeted motor or resistive load current
- Auxiliary contact type (1NO) aligns with logic or interlocking requirements
- Mounting arrangement (chassis or DIN rail) fits the enclosure or cabinet layout
- Operating temperature range (25°C to 60°C) covers expected ambient conditions
- Bulk packaging quantity matches procurement or inventory needs; boxed variant available for lower quantities
- Clearances and spacing for three-pole power switching are accounted for in the panel layout
FAQ
What load types is the 3RT20171AB01 rated for? The 12 A contact rating applies to general-purpose switching of motor or resistive loads; specific utilization category coordination depends on the overall system design.
How does the boxed version differ from bulk packaging? The 3RT20171AB011AA0 carries identical electrical and mechanical specifications but is packaged as a boxed unit rather than bulk.
What is the must-operate voltage of the 3RT20171AB01? 20.4 VAC; the coil releases if the applied voltage falls below this threshold.