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Siemens 3RT2024-1BB44-3MA0 DC Contactor - 12A, 24V DC

Siemens 3RT2024-1BB44-3MA0 3-pole power contactor with 24V DC coil.

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ManufacturerSiemens

Part number3RT2024-1BB44-3MA0

Type Power Contactor

Poles 3

AC-3e/AC-3 Rating 12A, 5.5 kW / 400 V

Coil Voltage 24V DC

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AC-3e/AC-3 rated 24V DC coil 2 NO + 2 NC auxiliary contacts Size S0 Captive auxiliary switch Screw terminals No surge suppressor retrofittable

Product description

The Siemens 3RT2024-1BB44-3MA0 is a 3-pole power contactor for AC-3e/AC-3 applications, rated at 12 A and 5.5 kW at 400 V. It features a 24 V DC coil and includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts. This size S0 contactor uses screw terminals and has a captive auxiliary switch, with no surge suppressor retrofittable.

This DC-operated contactor is designed for applications requiring a 24 V DC control voltage, such as in automation systems, emergency power circuits, or mobile equipment. The captive auxiliary switch ensures a secure connection and reliable operation in demanding environments.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation components, offers the Siemens 3RT2024-1BB44-3MA0. We provide quality, cost-effective parts to ensure your systems remain operational and efficient.

Technical specifications

Type	Power Contactor
Poles	3
AC-3e/AC-3 Rating	12A, 5.5 kW / 400 V
Coil Voltage	24V DC
Auxiliary Contacts	2 NO + 2 NC
Terminal Type	Screw
Size	S0
Auxiliary Switch	Captive

Common applications

DC Motor Control

Industrial Automation

Control Panels

Emergency Power

Mobile Equipment

Specialized Circuits

Compatible systems

DC control systems Siemens automation panels 24V DC power sources

Also known as

Siemens 3RT2024-1BB44-3MA0 Siemens Captive Aux Contactor 3RT2 S0 24V DC

Replaces / compatible with

This contactor is a direct replacement for Siemens 3RT2 series contactors with a 24V DC coil and captive auxiliary switches. It is compatible with Siemens S0 accessories.

Technical note

Expert tip

The captive auxiliary switch on the 3RT2024-1BB44-3MA0 ensures consistent contact operation and is integrated to prevent accidental detachment.

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Frequently asked questions

Does the Siemens 3RT2024-1BB44-3MA0 support surge suppression?

The Siemens 3RT2024-1BB44-3MA0 is designed with a captive auxiliary switch and does not support the retrofitting of a surge suppressor. For surge suppression, consider models with integrated varistors or diodes.