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Siemens 3RT1024-1BB44 SIRIUS DC Contactor w/ Aux

Siemens 3RT1024-1BB44 SIRIUS 3-pole DC contactor with 2NO+2NC.

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ManufacturerSiemens

Part number3RT1024-1BB44

Poles 3

AC-3 Current 12A

AC-3 Power 5.5kW @ 400V

Coil Voltage 24V DC

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3-pole main contacts 12A AC-3 rating 2 NO + 2 NC auxiliary contacts 24V DC coil Screw terminals DIN rail mountable

Product description

The Siemens 3RT1024-1BB44 is a 3-pole SIRIUS power contactor featuring integrated 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, with a 24V DC coil. It is rated for AC-3 applications at 12A and 5.5 kW at 400V. This Size S0 contactor uses screw terminals and is designed for standard 35mm DIN rail mounting.

This contactor is ideal for DC control applications that require both power switching and auxiliary signaling for interlocking or status feedback. It is commonly used in industrial automation, control panels, and specialized DC power systems.

Stanlo Automation, a veteran-owned distributor, provides the Siemens 3RT1024-1BB44. We are committed to offering high-quality industrial parts and exceptional customer support to ensure your operational continuity.

Technical specifications

Poles	3
AC-3 Current	12A
AC-3 Power	5.5kW @ 400V
Coil Voltage	24V DC
Aux Contacts	2 NO + 2 NC
Size	S0
Termination	Screw

Common applications

DC motor control with signaling

Automation systems

Control panels

Renewable energy

Battery systems

Machine safety

Compatible systems

Compatible with Siemens SIRIUS 3RU11/3RB20 overload relays.

Also known as

Siemens SIRIUS Contactor 3RT1024 Contactor 12A 3-Pole DC Contactor with Aux

Replaces / compatible with

This product is phased out. The preferred successor is the SIRIUS 3RT2024-1BB44.

Technical note

Expert tip

The integrated 2 NO + 2 NC auxiliary contacts are captive and provide reliable signaling for complex DC control schemes.

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Frequently asked questions

Does the Siemens 3RT1024-1BB44 include auxiliary contacts?

Yes, the Siemens 3RT1024-1BB44 features integrated auxiliary contacts, consisting of 2 normally open (NO) and 2 normally closed (NC) contacts, in addition to its main power poles. These are useful for control and signaling within DC circuits.