Rated 16 A / 7.5 kW at 400 V (AC-3), the Siemens 3RT2018-1AF01 is a 3-pole SIRIUS 3RT2 contactor, size S00, operated by a 110 V AC, 50/60 Hz coil. It has 1 NO integrated auxiliary contact, and Siemens rates it at 22 A for resistive (AC-1) loads at 40 °C. At 230 V the AC-3 motor rating is 4 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 | 3RT2018-1AF01 |
|---|---|
| Product | SIRIUS 3RT2 power contactor, 3-pole |
| Size | S00 |
| Utilisation category | AC-3 / AC-3e |
| Rated operational current AC-3 at 400 V | 16 A |
| Motor power AC-3 at 400 V | 7.5 kW |
| Motor power AC-3 at 230 V | 4 kW |
| Operational current AC-1 (40 °C, up to 690 V) | 22 A |
| Rated operating voltage, max. | 690 V |
| Coil voltage | 110 V AC, 50/60 Hz |
| Coil operating range | 0.8 … 1.1 x Us (50 Hz) |
| Coil pick-up power (50 Hz) | 37 V·A |
| Coil holding power (50 Hz) | 5.7 V·A |
| Auxiliary contacts (integrated) | 1 NO |
| Closing delay | 9 … 35 ms |
| Opening delay | 4 … 15 ms |
| Mechanical service life, typ. | 30,000,000 operating cycles |
| Power loss per pole (rated current) | 1W |
| Short-circuit protection, main circuit (type 1) | gG: 50 A (690 V, 100 kA), aM: 25 A (690 V, 100 kA), BS88: 50 A (415 V, 80 kA) |
| 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) | 45 x 58 x 73 mm |
| Net weight | 0.22 kg |
| Condition | New, original Siemens |
Typical applications
- Conveyor, mixer and packaging machine drives
- Pump, fan and compressor control panels
- Compact starter combinations with 3RV2 or 3RU2 in size S00
- Direct-on-line starters for motors up to 7.5 kW at 400 V
Compatibility and replacement
For overload protection mount a SIRIUS 3RU2 thermal overload relay of size S00 directly under the contactor, or combine it with a 3RV2 motor starter protector of the same size using the Siemens link module. Older 3RT10 contactors were replaced by the 3RT20 series; send us the old order number and we will confirm the current equivalent.
Frequently asked questions
What coil voltage does it need?
Per Siemens: 110 V AC, 50/60 Hz, operating range 0.8 … 1.1 x Us (50 Hz).
How many auxiliary contacts does it have?
It has 1 NO integrated; more can be added with 3RH2911 auxiliary switch blocks.
How fast can you deliver, and is there a warranty?
Air shipping usually takes 5 to 7 days once the part is ready, to almost any country. Each part is new and original with a 1-year warranty. Message us on WhatsApp with the order number for a quotation.
Ordering tips
Send us the full order number from the label of the old part, or a clear photo of the label, together with the quantity you need. We check the number against the current manufacturer data before we quote and tell you if there is a newer replacement.
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.
