Siemens 3RT20171AP61: S00 Frame Electromechanical Contactor
Catalog comparison — family screening
The table below presents the primary part alongside representative in-catalog peers that differ in contact arrangement, coil voltage, or current class. All parts share the 3RT2017 base number and DIN-rail / chassis mount option.
| 3RT20171AP61 | 3RT20171AP62 | 3RT20171AP01 | 3RT20171AP02 | |
|---|---|---|---|---|
| Coil Voltage | 240 VAC | 240 VAC | 230 VAC | 230 VAC |
| Contact Form | 3PST-NO | 3PST-NO | 3PST-NO | SPST-NC |
| Contact Rating | 12 A | 12 A | 12 A | 22 A |
| Coil Power | 36 VA | 36 VA | 37 VA | — |
| Must Operate Voltage | 192 VAC | 192 VAC | 195.5 VAC | 184 VAC |
| Operate Time | 33 ms | 35 ms | 33 ms | — |
| Operating Temperature | 25–60 °C | 25–60 °C | 25–60 °C | 25–60 °C |
| Encapsulation | Bulk | Box | Bulk | Box |
| Similarity (catalog) | — | 1.0 | 1.0 | 1.0 |
Why these peers are listed
- 3RT20171AP62 — Same 240 VAC coil and 12 A NO contacts; differs only in encapsulation (box vs bulk) and a 2 ms slower operate time.
- 3RT20171AP01 — Matches 12 A NO contacts and similar power draw (37 VA); the 230 VAC coil and 195.5 VAC must-operate voltage reflect a 10 V lower nominal coil.
- 3RT20171AP02 — Shares the 230 VAC coil class and auxiliary-contact feature, but uses a SPST-NC main contact form rated at 22 A — a higher current class within the same frame.
These peers require the reader's own qualification before substitution.
Key parameters
| Parameter | Value |
|---|---|
| Brand | Siemens |
| Frame size | S00 |
| Main contact form | 3PST-NO (three normally-open poles) |
| Contact rating | 12 A |
| Coil voltage | 240 VAC |
| Coil power consumption | 36 VA |
| Must operate voltage | 192 VAC |
| Operate time | 33 ms |
| Mounting | Chassis mount, DIN rail |
| Features | Auxiliary contacts included |
| Operating temperature | 25 °C to 60 °C |
| Encapsulation | Bulk |
Application notes
The 3RT20171AP61 is a three-pole, normally-open contactor in the Siemens S00 frame family, intended for switching AC loads in motor or heating-branch applications. The 240 VAC coil operates reliably down to 192 VAC, providing a 20% pull-in margin typical for electromechanical designs in industrial control circuits.
The auxiliary-contact feature supports interlocking or signal feedback in a control scheme without requiring a separate relay block.
Because the operating temperature range (25–60 °C) reflects published bounds, evaluate thermal conditions inside the enclosure — particularly when adjacent devices contribute heat or when the contactor carries load current approaching rating in a confined space.