Description
The Siemens 3RT1026-1AL20 is a SIRIUS S0 motor starter contactor engineered for AC-3 motor loads up to 11 kW at 400 V. With a 230 V AC coil and rugged screw-terminal construction, it provides dependable switching performance in industrial motor-control applications.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Siemens |
| Category |
Contactors & Starters |
| Part Number |
3RT1026-1AL20 |
| Subcategory |
Contactor |
| Product Family |
SIRIUS 3RT10 |
| Contactor Size |
S0 |
| Number of Poles |
3 |
| Main Contacts |
3NO |
| Auxiliary Contacts |
None |
| Coil Voltage |
230 V AC, 50/60 Hz |
| Coil Operating Range |
0.8–1.1× (50 Hz), 0.85–1.1× (60 Hz) |
| Pickup Power (AC) |
64 VA |
| Holding Power (AC) |
8.4 VA |
| Operating Temperature |
–25 °C to +60 °C |
| Mechanical Life |
Up to 10,000,000 cycles |
| Electrical Ratings AC-1 |
40 A @ 400–690 V |
| Electrical Ratings AC-3 |
25 A @ 400 V |
| AC-3 Motor Power |
11 kW @ 400/500/690 V |
| AC-4 Rating |
15.5 A @ 400 V |
| DC-1 Rating (1-path) |
35 A @ 24 V; 4.5 A @ 110 V |
| DC-1 Rating (2-path) |
35 A @ 24 V; 35 A @ 110 V |
| DC-1 Rating (3-path) |
35 A @ 24 V; 35 A @ 110 V |
| DC-3 / DC-5 (1-path) |
20 A @ 24 V; 2.5 A @ 110 V |
| DC-3 / DC-5 (2-paths) |
35 A @ 24 V; 15 A @ 110 V |
| DC-3 / DC-5 (3-paths) |
35 A @ 24 V; 35 A @ 110 V |
| Contact Reliability |
1 faulty switching / 100 million ops |
| Protection Class |
IP20 (front), IP00 (terminals) |
| Short-Circuit Protection |
gL/gG fuse 100 A (coord. 1), 35 A (coord. 2) |
| Mounting |
Screw or snap-on DIN rail (35 mm) |
| Dimensions (H×W×D) |
85 × 45 × 91 mm |
| Conductor Size (Main) |
Solid: up to 2×10 mm²; Stranded: up to 2×10 mm² |
| Conductor Size (Aux) |
Solid/stranded up to 4 mm² |
| Side-by-Side Mounting |
Yes |
| Status |
Discontinued by manufacturer |
| Weight |
0.71 lbs |
Information About 3RT1026-1AL20
The 3RT1026-1AL20 belongs to Siemens’ SIRIUS 3RT10 contactor family, designed for motor starting, switching, and control in three-phase power systems. This S0-size device includes three normally-open main contacts with no auxiliary contacts, optimized for compact control-panel layouts while supporting side-by-side mounting. The contactor is rated for demanding operating categories such as AC-3 and AC-4 and supports both AC and DC load paths. As a discontinued Siemens product, it is used primarily as a replacement unit for legacy machinery, CNC equipment, and industrial control panels.
Key Features:
- 11 kW AC-3 Rating: Suitable for motor loads up to 11 kW at 400/500/690 V.
- 230 V AC Coil (50/60 Hz): Wide operating range: 0.8–1.1× (50 Hz) and 0.85–1.1× (60 Hz).
- S0 Contactor Size: Compact industrial design for efficient control-panel integration.
- 3-Pole Main Contact Set: Three normally-open main contacts with no auxiliary contacts.
- High Mechanical Durability: Up to 10 million mechanical switching cycles typical.
- Strong Electrical Ratings: 25 A AC-3 at 400 V; 40 A AC-1 at 400–690 V.
- Multi-Path DC Switching: Supports DC-1 and DC-3 loads with 1-, 2-, or 3-path series switching options.
- IP20/IP00 Protection: IP20 at the front, IP00 at terminals for safe internal mounting.
- Flexible Installation: Snap-on or screw mounting onto 35 mm DIN rail (EN 50022).
- Robust Screw-Type Terminals: Accepts a wide range of solid, stranded, and AWG conductors.
The 3RT1026-1AL20 delivers the reliability and precision required for motor switching, control-circuit integration, and industrial automation.
