Siemens SIRIUS 3RT2 Power Contactor 11kW/400V 2NO+2NC 24V DC Coil, Screw Terminals, IP20 3RT20261BB443MA0

Rated for 11 kW at 400 V AC-3, this SIRIUS 3RT2 contactor switches motors up to 25 A with a 24 V DC coil and 2 NO + 2 NC auxiliary contacts.

Overview

The Siemens 3RT2026-1BB44-3MA0 is a 3-pole power contactor from the SIRIUS 3RT2 series, size S0. It is designed for switching three-phase motors up to 11 kW at 400 V AC-3. The contactor features a 24 V DC control coil and screw terminals for both main and auxiliary circuits. It mounts on a 35 mm DIN rail or with screws.

What stands out

• High electrical endurance: 10 million switching cycles at AC-3
• Mechanical endurance: 30 million cycles
• Rated insulation voltage 690 V, impulse withstand 6 kV
• Wide operating temperature range: -25 to +60 °C
• Compact S0 size for space-saving installation

Technical details

• Rated operational current (AC-3, 400 V): 25 A
• Number of poles: 3
• Auxiliary contacts: 2 NO + 2 NC
• Control supply voltage: 24 V DC
• Main circuit connection: screw terminals
• Auxiliary circuit connection: screw terminals
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Mounting: screw and snap-on onto 35 mm DIN rail
• Short-circuit protection: gG fuse 40 A

Our verdict

A robust industrial contactor with proven SIRIUS reliability, ideal for motor control in demanding environments.