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Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3RT2026-1AG20 |
| Manufacturer | Siemens AG |
| Product Family | SIRIUS 3RT2 |
| Product Type | 3-Pole AC Power Contactor |
| Size | S0 |
| Rated Control Supply Voltage (Us) | 110 V AC, 50/60 Hz |
| Rated Operating Current (AC-3, 400V) | 25 A |
| Rated Operating Current (AC-1, 400V) | 40 A |
| Rated Operating Current (AC-4, 400V) | 15.5 A |
| Rated Operating Power (AC-3, 400V) | 11 kW |
| Main Contact Configuration | 3 NO (Normally Open) |
| Auxiliary Contacts | 1 NO + 1 NC (integrated) |
| Rated Insulation Voltage (Ui) | 690 V |
| Rated Impulse Withstand Voltage (Uimp) | 6 kV |
| Connection Type | Screw Terminal |
| Mechanical Service Life | 10,000,000 switching cycles |
| Electrical Service Life (AC-3) | ≥ 1,000,000 switching cycles |
| Loss Power per Pole (AC, hot) | 1.9 W |
| Total Loss Power (AC, hot) | 5.7 W typical |
| Operating Temperature Range | -25°C to +60°C |
| Storage Temperature Range | -55°C to +80°C |
| Maximum Installation Altitude | 2000 m above sea level |
| Degree of Protection (IP) | IP20 |
| Mounting Method | DIN Rail / Screw Fixing |
| Packaging Dimensions (L×W×H) | 92 × 54 × 105.5 mm |
| Net Weight | 0.416 kg |
| Standards Compliance | IEC 60947-4-1, UL 508, CCC, RoHS |
| Country of Origin | Germany |
| Product Lifecycle Status | Active |
Main Features and Advantages
The Siemens 3RT2026-1AG20 delivers outstanding value through a carefully balanced blend of compact design, long service life, and seamless system integration. Its defining characteristic is the ability to switch 11 kW motors at 400 V within the remarkably small S0 footprint—measuring just 92 × 54 × 105.5 mm and weighing only 0.416 kg. This space efficiency translates directly into higher component density per control cabinet, reducing enclosure size and overall panel cost.Exceptional Durability: The Siemens 3RT2026-1AG20 achieves a mechanical service life of 10 million switching cycles and an electrical endurance of over 1 million operations under AC-3 duty. This exceptional longevity minimizes replacement frequency and unplanned downtime, delivering a very low total cost of ownership across the product’s operational lifetime. The silver alloy contacts and optimized magnetic circuit ensure stable contact resistance and minimal arc energy, keeping temperature rise low even under continuous load.Energy-Efficient Coil Design: The Siemens 3RT2026-1AG20 incorporates a low-power consumption holding coil that requires approximately 2 W in the maintained state—significantly less than legacy contactor designs. This efficiency reduces control circuit loading and contributes to measurable energy savings in installations with numerous contactors operating simultaneously. The 110 V AC coil operates reliably across voltage fluctuations within ±15% of nominal, eliminating the risk of partial engagement that can cause contactor burnout.Integrated Auxiliary Contacts: Equipped with 1NO + 1NC auxiliary contacts as standard, the Siemens 3RT2026-1AG20 enables direct status feedback to PLCs or control relays without the need for separate auxiliary devices. This built-in functionality simplifies wiring, reduces component count, and lowers overall system complexity. The mirror-contact arrangement also supports safety-related feedback circuits when combined with appropriate monitoring.Robust Electrical Ratings: With 690 V insulation voltage and 6 kV impulse withstand capability for both main and auxiliary circuits, the Siemens 3RT2026-1AG20 provides a generous safety margin against transient overvoltages and grid disturbances. The device can handle AC-1 resistive loads up to 40 A and AC-4 inching/plug-in duty at 15.5 A, demonstrating remarkable versatility across diverse load types.Modular SIRIUS System Compatibility: The Siemens 3RT2026-1AG20 is designed as a native member of the SIRIUS 3RT2 ecosystem, allowing it to be directly coupled with 3RU thermal overload relays, 3RA solid-state combination starters, surge suppressors, and mechanical interlocks. This plug-together architecture creates standardized motor starter assemblies that are faster to design, simpler to install, and easier to maintain.Wide Environmental Tolerance: Rated for operation from -25°C to +60°C and storage from -55°C to +80°C, the Siemens 3RT2026-1AG20 performs reliably in harsh industrial settings including outdoor enclosures, cold storage facilities, and high-temperature machine rooms. Its resistance to humidity (up to 95% RH at 55°C per IEC 60068-2-30) ensures dependable operation in tropical and coastal environments.
