3RT20171BB443MA0

The Siemens SIRIUS 3RT2017-1BB44-3MA0 is a reversible (forward and reverse rotation) electromagnetic contactor, AC-3 rated at 12A, 5.5kW/400V, with a 24V DC coil. It has 4 sets of auxiliary contacts (2NO+2NC). The main circuit uses traditional screw terminals, and its specifications are the same as the spring terminal version in the same series, only the terminal type is different.

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Siemens 3RT2017-1BB44-3MA0 Reversible Contactor AC-3 12A 5.5kW Screw Terminal

Product Positioning

The 3RT2017-1BB44-3MA0 and the aforementioned 3RT2017-2BB44-3MA0 are twin models with the same auxiliary contact configuration. Both have 4 sets of auxiliary contacts (2NO+2NC), AC-3 rated 12A, 5.5kW/400V, and the coil is 24V DC. The biggest difference between the two is the terminal type: the "1" at the beginning of the model number indicates that this machine uses traditional screw terminals (as opposed to the spring terminal version starting with "2"). For switchboard manufacturers who are used to screwing in the terminals or need to conform to existing wiring standards, this is an alternative with the same function but different terminal interfaces, allowing for flexible selection based on on-site wiring habits.

Core Product Advantages and Features

Electrical specifications are the same as the spring terminal version.

The AC-3 is rated at 12A, 5.5kW/400V, with a 24V DC coil and 2NO+2NC auxiliary contacts, and is completely identical to the 3RT2017-2BB44-3MA0.

Traditional screw terminal design

The main circuit and control circuit adopt industry-standard screw terminals, which facilitates operation for production line and maintenance personnel accustomed to screw wiring.

Built-in 2NO+2NC four sets of auxiliary contacts

It can be used for forward and reverse interlocking and status feedback circuits without the need for external auxiliary contact modules.

S00 Small Frame

It shares the smallest S00 enclosure size with the 3RT2017 family, making it suitable for installation in space-constrained distribution boxes.

project	Specification
Model (MLFB)	3RT2017-1BB44-3MA0
Casing size	S00
Extreme number	3 poles
AC-3 rated current	12 A
AC-3 rated power	5.5 kW / 400V
coil voltage	24V DC
Auxiliary contacts	Built-in 4 groups (2 NO + 2 NC)
Terminal type	Screw terminals
Application type	Forward/Reverse/Reversible Control
Comparison within the same series	The terminal type differs from 3RT2017-2BB44-3MA0 (spring terminal version), but the other specifications are the same.

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