Buy genuine Siemens 3RT20261KB40 online
The Siemens 3RT20261KB40 is a premium SIRIUS power contactor designed for demanding industrial automation environments. Rated for a maximum load current of 25 A and capable of switching motors with a power rating up to 11 kW at 400 V AC, this robust 3-pole, non-reversing contactor ensures reliable performance in motor control and switching applications. Featuring a 24 V DC coil and auxiliary contacts (1 NO + 1 NC), it includes a plugged-in varistor for enhanced coil protection. Its compact SZ0 size and IP20 protection class make it easy to install on DIN rails while maintaining safety standards. The rugged design supports up to 10 million operating cycles and offers finger-safe terminals, supporting continuous operation in ambient temperatures ranging from -25 to +60 °C. Designed by Siemens, a leader in industrial control components, the 3RT20261KB40 balances high performance with durability, making it ideal for factory automation and machine control systems.
Key Features of Siemens 3RT20261KB40
- Rated load current of 25 A for AC-3 motor switching at 400 V
- Power rating of 11 kW for three-phase motors up to 20 hp
- 24 V DC coil with plugged-in varistor for coil surge protection
- 3-pole non-reversing contactor with 1 NO + 1 NC auxiliary contacts
- Compact SZ0 size for easy DIN rail mounting
- IP20 protection class and finger-safe screw terminals
- Operating temperature range: -25 to +60 °C for industrial environments
- Designed for up to 10 million mechanical operating cycles
- Shock and impulse voltage tested for enhanced reliability
Explore Siemens 3RT20261KB40 specifications for detailed parameters
| Specification |
Value |
| Rated operational current AC-3 (400 V) |
25 A |
| Power rating (3-phase motor, 400 V) |
11 kW / 20 hp |
| Coil voltage |
24 V DC |
| Number of poles |
3 |
| Auxiliary contacts |
1 NO + 1 NC |
| Protection class |
IP20 |
| Operating temperature |
-25 to +60 °C |
| Mounting type |
DIN Rail / Snap-On / Threaded |
| Mechanical operating cycles |
10,000,000 |
Applications / Use Case
This Siemens 3RT20261KB40 is commonly used in industrial automation settings where reliable motor switching and control are essential. It is ideal for production line systems, factory control panels, and motion control setups, delivering consistent performance under heavy loads. Its robust construction and built-in varistor make it a preferred choice for conveyor belt systems, packaging machinery, and process control applications requiring safe, long-lasting operation. The contactor’s compatibility with standard DIN rail mounting further simplifies integration into existing automation architecture, ensuring smooth installation and maintenance.
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