3RT2024-1BB44

Siemens 3RT2024-1BB44 24V DC coil 2NO+2NC contactor
Siemens 3RT2024-1BB44 24V DC coil 2NO+2NC contactor

The S0 contactor has a 24V DC coil and four sets of auxiliary contacts (2NO+2NC) built into one unit, which can complete multi-circuit interlocking and feedback configuration without the need for external auxiliary contact sockets.

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Siemens 3RT2024-1BB44 24V DC coil 2NO+2NC contactor
Product Positioning

The 3RT2024-1BB44 is also an S0 contactor with a 24V DC coil. The biggest difference between it and the -1BB40 is the number of built-in auxiliary contact groups: this model provides four instantaneous contact groups (2NO + 2NC), eliminating the need for external auxiliary contact sockets and simultaneously meeting the needs of multiple signals such as operation feedback, fault interlocking, and indicator light drive. The main circuit AC-3 remains 12A, 5.5kW/400V. The body depth has increased to 151mm to accommodate the increased number of contact groups. It is recommended to confirm the existing installation depth of the control box before selecting this model.

Core Product Advantages and Features
2NO+2NC integrated molding
Four sets of auxiliary contacts are built into the contactor body, eliminating the need for external auxiliary contact sockets, and can meet the needs of multiple feedback and interlocking.
24V DC coil, with clearly defined holding power.
The closing and holding power are both 5.9W, which facilitates power module capacity planning and DC power supply design.
690V rated insulation voltage
Both the main circuit and the auxiliary circuit have passed the 690V insulation level test and the pollution level is 3, making them suitable for high-voltage power distribution environments.
Original factory type testing and certification complete
It has type test certificates and EMC compatibility documents, which facilitates verification requirements when shipping the complete machine.
project Specification
Rated operating current AC-3 12 A (400 V)
Rated power AC-3 5.5 kW / 400 V
Control power supply voltage 24 V DC
Coil power Closing 5.9W / Holding 5.9W
auxiliary contacts 2 NO + 2 NC (Instantaneous)
Extreme number 3 poles
Body size S0 (45×85×151 mm)
Terminal type The main circuit, auxiliary circuit, and coil all use screw terminals.
Protection level IP20 (Front-facing fingertip protection)
Mechanical life Approximately 10 million operation cycles
Electrical life Approximately 200,000 times (AC-4)
Rated insulation voltage 690 V, pollution level 3
Original manufacturer certification Type test certificate, EMC compatibility test documents

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