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Siemens 3RT2027-1BB44-3MA0 SIRIUS Contactor — 32A 15kW 24V DC, Captive Aux

Siemens 3RT2027-1BB44-3MA0 3-pole contactor, 32A, 15kW, 24V DC, captive aux.

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ManufacturerSiemens

Part number3RT2027-1BB44-3MA0

Type Power Contactor

Poles 3

AC-3e/AC-3 Rating 32A

Max Power (400V) 15 kW

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CAGE: 9NK75

AC-3e/AC-3 rating 32A switching current 15kW power capacity 24V DC coil Captive 2 NO + 2 NC auxiliary contacts No retrofittable surge suppressor

Product description

The Siemens 3RT2027-1BB44-3MA0 is a 3-pole power contactor for AC-3e/AC-3 applications, rated at 32A and 15kW at 400V. It features a 24V DC coil and 2 NO + 2 NC auxiliary contacts, with screw terminals. A key characteristic is its captive auxiliary switch, meaning the auxiliary contacts are integrated and not removable, and it is noted that no surge suppressor can be retrofitted.

This contactor is suitable for robust motor control and switching tasks within DC-controlled systems where integrated auxiliary contacts are preferred and additional surge suppression is not required or handled elsewhere. Industries such as industrial automation, manufacturing, and machine building benefit from its specialized design.

Stanlo Automation, a veteran-owned distributor of surplus industrial parts, offers the Siemens 3RT2027-1BB44-3MA0. Secure reliable components for your specific automation needs with confidence from Stanlo.

Technical specifications

Type	Power Contactor
Poles	3
AC-3e/AC-3 Rating	32A
Max Power (400V)	15 kW
Coil Voltage	24V DC
Auxiliary Contacts	2 NO + 2 NC
Terminal Type	Screw
Size	S0
Auxiliary Switch	Captive

Common applications

Motor control

DC control systems

Industrial automation

Machine building

Control panels

Integrated circuits

Compatible systems

Designed for use in 24V DC control systems and compatible with other Siemens SIRIUS components.

Also known as

Siemens 3RT2027 Contactor SIRIUS 3RT2027-1BB44-3MA0 32A 24V DC captive auxiliary contactor

Replaces / compatible with

This contactor is a specific variant within the Siemens SIRIUS 3RT2 series, featuring integrated auxiliary contacts and designed for applications where retrofitting surge suppressors is not intended.

Technical note

Expert tip

Due to the captive auxiliary switch and lack of a retrofittable surge suppressor, this specific model is ideal for applications where these features are not critical or are managed by other components in the system.

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Frequently asked questions

What does 'captive auxiliary switch' mean for the 3RT2027-1BB44-3MA0?

A captive auxiliary switch on the Siemens 3RT2027-1BB44-3MA0 means the auxiliary contacts are permanently attached to the contactor body and cannot be removed or replaced independently. This design offers enhanced reliability in certain environments.