Rated 95 A / 45 kW at 400 V (AC-3), the Siemens 3RT2046-1AF00 is a 3-pole SIRIUS 3RT2 contactor, size S3, operated by a 110 V AC, 50 Hz coil. 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 22 kW.
A contactor is the switching element of a motor starter: the PLC or a push-button energises the coil, and the main contacts connect the motor to the supply. Contactors wear with every start, so they are among the most frequently replaced parts in motor control centres.
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 | 3RT2046-1AF00 |
|---|---|
| Product | SIRIUS 3RT2 power contactor, 3-pole |
| Size | S3 |
| Utilisation category | AC-3 / AC-3e |
| Rated operational current AC-3 at 400 V | 95 A |
| Motor power AC-3 at 400 V | 45 kW |
| Motor power AC-3 at 230 V | 22 kW |
| Operational current AC-1 (40 °C, up to 690 V) | 130 A |
| Rated operating voltage, max. | 1,000 V |
| Coil voltage | 110 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) | 6.6 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 | 1.656 kg |
| Condition | New, original Siemens |
Typical applications
- Switching heaters and resistive loads (AC-1)
- Star-delta starter assemblies
- Conveyor, mixer and packaging machine drives
- 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. The coil voltage is coded in the order number (here 110 V AC, 50 Hz), so check it against your control circuit before ordering.
Frequently asked questions
Can I use it for a 7.5 kW motor?
This contactor is rated 45 kW at 400 V (AC-3, 95 A). Choose a contactor whose AC-3 rating at your supply voltage is at least the motor rating.
Which overload relay fits it?
A SIRIUS 3RU2 overload relay of size S3, for example 3RU2136, set to the motor full-load current.
Can I get a price and delivery time?
Prices are quoted on request. Send the order number, quantity and delivery country on WhatsApp and we will reply with price and delivery time; air shipping is usually 5 to 7 days once ready, with a 1-year warranty.
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.
