Siemens 3RT20174AR61 S00 Contactor
Application Context
The 3RT20174AR61 is a three-pole contactor designed for installation in motor branch circuits and feeder assemblies, typically mounted on a DIN rail within an enclosure. As a size S00 device, it occupies a compact form factor suited for distributed control panels and modular starter combinations.
Key Specifications
Coil and Control Parameters
| Parameter | Value |
|---|---|
| Coil Voltage | 440 VAC |
| Coil Power | 43 VA |
| Must Operate Voltage | 374 VAC |
| Operate Time | 35 ms |
Main Contact and Mechanical Ratings
| Parameter | Value |
|---|---|
| Contact Form | 3PST-NO (3 Form A) |
| Contact Rating (Current) | 12 A |
| Mounting Type | Chassis Mount, DIN Rail |
| Encapsulation | Box |
| Operating Temperature | 25°C ~ 60°C |
The auxiliary contact feature listed in the catalog indicates an integrated auxiliary contact block for signaling or interlock purposes.
Similar Catalog Parts
The table below presents a side-by-side screening of in-catalog comparison rows sharing the same base product number (3RT2017) and physical frame. These are parametric peers requiring the reader's own qualification before substitution.
| MPN | Coil Voltage | Contact Form | Coil Power | Must Operate Voltage | Similarity (0–1) |
|---|---|---|---|---|---|
| 3RT20174AR61 | 440 VAC | 3PST-NO | 43 VA | 374 VAC | — |
| 3RT20174AR62 | 440 VAC | 3PST-NO | 43 VA | 374 VAC | 1.00 |
| 3RT20174AK61 | 120 VAC | 3PST-NO | 36 VA | 96 VAC | 0.96 |
| 3RT20174AN61 | 220 VAC | 3PST-NO | 43 VA | 187 VAC | 0.96 |
Why they are similar
- 3RT20174AR62: Matches the seed across all recorded parameters; the sole difference is catalog-level auxiliary contact designation.
- 3RT20174AK61: Shares the S00 frame, 12 A contact rating, and three-pole NO configuration; the coil voltage of 120 VAC and reduced must-operate threshold (96 VAC) reflect a different control voltage class.
- 3RT20174AN61: Matches the 43 VA coil power and 35 ms operate time of the seed; the 220 VAC coil class yields a must-operate threshold of 187 VAC.
FAQ
What does the S00 size designation mean for the 3RT20174AR61? S00 refers to the Siemens size classification for this contactor series, defining a compact frame suitable for DIN rail or chassis mounting in motor feeder and control circuits.
Can the 3RT20174AR61 be mounted on a standard DIN rail? Yes. The catalog lists both Chassis Mount and DIN Rail mounting types, which is typical for modular starter and feeder combinations.
What is the must-operate voltage of this contactor? The must-operate voltage is listed as 374 VAC, meaning the coil reliably energizes at or above that threshold.