SIEMENS 3RT2024-1BB44-3MA0

Siemens SIRIUS Power Contactor Assembly

Description

This is a 3RT2024-1BB44-3MA0 power contactor from the Siemens SIRIUS series. It is a robust and reliable component designed for switching motors. This specific model is a factory assembly that includes a permanently mounted auxiliary switch block, making it a complete solution for various control applications, particularly in elevators. The 24V DC coil makes it suitable for direct control from PLC outputs.

Specifications

• Manufacturer: Siemens
• Series: SIRIUS
• Model: 3RT2024-1BB44-3MA0
• Type: Power Contactor, 3-pole
• Size: S0
• Coil Voltage: 24V DC
• AC-3 Power Rating (400V): 5.5 kW
• AC-3 Current Rating (400V): 12 A
• AC-1 Current Rating: 40 A
• Auxiliary Contacts: 2 NO (Normally Open) + 2 NC (Normally Closed)
• Connection Type: Screw terminals

Label Info

• Siemens AG, DE-92220 Amberg
• EAN: 4011209837065
• Instr.Ord.No.: 3ZX1012-0RT22-1AA1

Application

Ideal for motor control, automation systems, and specifically designed for use in elevator control panels. Also suitable for pumps, fans, and conveyor systems where reliable switching is critical.

Country of Origin

Made in Germany.

CO2 Impact

Opting for this component saves approximately 16 kg of CO2 compared to manufacturing a new one. This is equivalent to the emissions from driving a standard car for 80 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the significance of the “-3MA0” suffix on this contactor?

The “-3MA0” suffix indicates this is a specific factory-assembled unit, combining the base contactor (3RT2024-1BB40) with a permanently mounted 2NO+2NC auxiliary switch block (3RH2911-1HA22). It is often specified for applications like elevators that require this exact contact configuration from the factory.

Can the auxiliary switch block be removed or replaced?

On this specific “-3MA0” assembly, the auxiliary switch is permanently mounted and not designed to be removed. If you require a different contact configuration, you would need to select a standard 3RT2024 contactor and a separate, removable 3RH29 auxiliary switch.

Is this contactor suitable for use with PLCs?

Yes, the 24V DC coil is ideal for direct control from PLC transistor outputs without the need for an interposing relay, provided the PLC output can supply the required coil power. Its low power consumption is well-suited for modern automation systems.

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Last Update: Friday, March 13, 2026