With a 230 V AC, 50 Hz coil and a motor rating of 55 kW at 400 V, the Siemens 3RT2047-1AP00 is the size S3 member of the SIRIUS 3RT2 contactor range for 110 A AC-3 duty. It has 1 NO + 1 NC integrated auxiliary contacts, and Siemens rates it at 130 A for resistive (AC-1) loads at 40 °C. At 230 V the AC-3 motor rating is 30 kW.
Contactors in pump, fan, conveyor and compressor panels may switch thousands of times a day, and contact wear is the usual reason for replacement. Keeping a spare of the same order number avoids long stoppages.
See our Siemens industrial controls range, including SIRIUS 3RU2 overload relays and 3RV2 motor starter protectors for the same size.
Technical data
| Siemens order number | 3RT2047-1AP00 |
|---|---|
| Product | SIRIUS 3RT2 power contactor, 3-pole |
| Size | S3 |
| Utilisation category | AC-3 / AC-3e |
| Rated operational current AC-3 at 400 V | 110 A |
| Motor power AC-3 at 400 V | 55 kW |
| Motor power AC-3 at 230 V | 30 kW |
| Operational current AC-1 (40 °C, up to 690 V) | 130 A |
| Rated operating voltage, max. | 1,000 V |
| Coil voltage | 230 V AC, 50 Hz |
| Coil operating range | 0.8 … 1.1 x Us (50 Hz) |
| Coil pick-up power (50 Hz) | 296 V·A |
| Coil holding power (50 Hz) | 19 V·A |
| Auxiliary contacts (integrated) | 1 NO + 1 NC |
| Closing delay | 13 … 50 ms |
| Opening delay | 10 … 21 ms |
| Mechanical service life, typ. | 10,000,000 operating cycles |
| Power loss per pole (rated current) | 7.9 W |
| Short-circuit protection, main circuit (type 1) | gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 |
| Ambient temperature (operation) | -25 … +60 °C |
| Connection type | screw-type terminals |
| Mounting | screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715 |
| Dimensions (W x H x D) | 70 x 140 x 152 mm |
| Net weight | 1.649 kg |
| Condition | New, original Siemens |
Typical applications
- Star-delta starter assemblies
- Direct-on-line starters for motors up to 55 kW at 400 V
- Switching heaters and resistive loads (AC-1)
- Pump, fan and compressor control panels
Compatibility and replacement
For overload protection mount a SIRIUS 3RU2 thermal overload relay of size S3 directly under the contactor, or combine it with a 3RV2 motor starter protector of the same size using the Siemens link module. Auxiliary contact blocks (3RH2911) can be snapped on the front to add more NO/NC contacts.
Frequently asked questions
What coil voltage does it need?
Per Siemens: 230 V AC, 50 Hz, operating range 0.8 … 1.1 x Us (50 Hz).
How many auxiliary contacts does it have?
It has 1 NO + 1 NC integrated; more can be added with 3RH2911 auxiliary switch blocks.
Do you ship to my country, and what is the warranty?
Yes. RendatSP ships worldwide from Yiwu, China, by air in 5 to 7 days once the part is ready, and every part carries a 1-year warranty. Send the order number and quantity on WhatsApp and we will reply with a quotation.
Before you order
Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.
Need it fast? Send the order number, quantity and delivery country on WhatsApp or through the inquiry form and we reply with a quotation the same working day. All parts are new and original, covered by a 1-year warranty, and ship worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Local agents: Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
