The Siemens 3RT2026-1AB00 is a SIRIUS 3RT2 power contactor in size S0 that switches three-phase motors up to 11 kW at 400 V (25 A in utilisation category AC-3), with a 24 V AC, 50 Hz operating coil. It has 1 NO + 1 NC integrated auxiliary contacts, and Siemens rates it at 40 A for resistive (AC-1) loads at 40 °C. Per the Siemens data sheet the coil picks up within 8 … 40 ms and drops out within 4 … 16 ms.
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 | 3RT2026-1AB00 |
|---|---|
| Product | SIRIUS 3RT2 power contactor, 3-pole |
| Size | S0 |
| Utilisation category | AC-3 / AC-3e |
| Rated operational current AC-3 at 400 V | 25 A |
| Motor power AC-3 at 400 V | 11 kW |
| Motor power AC-3 at 230 V | 5.5 kW |
| Operational current AC-1 (40 °C, up to 690 V) | 40 A |
| Rated operating voltage, max. | 690 V |
| Coil voltage | 24 V AC, 50 Hz |
| Coil operating range | 0.8 … 1.1 x Us (50 Hz) |
| Coil pick-up power (50 Hz) | 77 V·A |
| Coil holding power (50 Hz) | 9.8 V·A |
| Auxiliary contacts (integrated) | 1 NO + 1 NC |
| Closing delay | 8 … 40 ms |
| Opening delay | 4 … 16 ms |
| Mechanical service life, typ. | 10,000,000 operating cycles |
| Power loss per pole (rated current) | 1.9 W |
| Short-circuit protection, main circuit (type 1) | gG: 100 A (690 V, 100 kA), aM: 50 A (690 V, 100 kA), BS88: 100 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) | 45 x 85 x 97 mm |
| Net weight | 0.391 kg |
| Condition | New, original Siemens |
Typical applications
- Pump, fan and compressor control panels
- Switching heaters and resistive loads (AC-1)
- Direct-on-line starters for motors up to 11 kW at 400 V
- Conveyor, mixer and packaging machine drives
Compatibility and replacement
For overload protection mount a SIRIUS 3RU2 thermal overload relay of size S0 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 24 V AC, 50 Hz), so check it against your control circuit before ordering.
Frequently asked questions
What coil voltage does it need?
Per Siemens: 24 V AC, 50 Hz, operating range 0.8 … 1.1 x Us (50 Hz).
Which overload relay fits it?
A SIRIUS 3RU2 overload relay of size S0, for example 3RU2126, set to the motor full-load current.
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.
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.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the order number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
