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.