3RT2023-1BB44-3MA0

Siemens 3RT2023-1BB44-3MA0 DC24V threaded terminal block with 2NO+2NC fixed auxiliary contacts, electromagnetic contactor.
Siemens 3RT2023-1BB44-3MA0 DC24V threaded terminal block with 2NO+2NC fixed auxiliary contacts, electromagnetic contactor.

The Siemens 3RT2023-1BB44-3MA0 is based on a standard DC24V contactor and is equipped with 2NO+2NC non-removable auxiliary contacts manufactured in accordance with SUVA safety specifications, making it suitable for safety interlocking circuits.

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Siemens 3RT2023-1BB44-3MA0 DC24V threaded terminal block with 2NO+2NC fixed auxiliary contacts, electromagnetic contactor.
Product Positioning

The 3RT2023-1BB44-3MA0 is based on the standard 3RT2023-1BB44 (DC24V, 2NO+2NC, threaded terminals), and additionally features the safety specifications represented by the "-3MA0" code at the end of the model number: an auxiliary contact assembly manufactured according to Swiss SUVA safety application specifications, permanently fixed to the main body, and non-replaceable. This design ensures a stable correspondence between the on/off state of the auxiliary contacts and the action of the main contacts, preventing the reliability of the safety interlock circuit from being affected by accidental replacement or loosening of the contact module. It is commonly used in mechanical safety protection circuits, emergency stop circuits, and other applications requiring high-reliability feedback signals. The main circuit specifications are consistent with the same series, with a rated current of 9A for AC-3 and a rated power of 4kW at 400V. The main contacts have been verified to withstand 690V AC voltage.

Core Product Advantages and Features
SUVA Safety Specification Fixed Auxiliary Contacts
The auxiliary contact assembly is designed and permanently fixed according to the Swiss SUVA safety application specifications, and cannot be replaced. It is suitable for high-reliability feedback requirements such as safety interlocks and emergency stops.
2NO+2NC auxiliary contacts
It provides 2 sets of normally open and 2 sets of normally closed fixed contacts, which can simultaneously meet the needs of multiple interlocking signals and operating status indications.
DC24V, screw terminal
The coil has a rated voltage of 24V DC, and both the main circuit and the auxiliary circuit are secured with threaded terminals, ensuring stable and reliable wiring.
S0 frame, 690V withstand voltage
The AC-3 three-pole main contact has a rated current of 9A and a rated power of 4kW at 400V. The main contacts can withstand 690V AC voltage and comply with IEC/EN 60947-4-1.
project Specification
model 3RT2023-1BB44-3MA0
Coil rated voltage DC 24 V
Coil type DC electromagnetic coil
Auxiliary contact configuration 2 NO + 2 NC, permanently fixed (non-replaceable)
Special Specifications Manufactured in accordance with Swiss SUVA safety application standards (order code suffix -3MA0)
Wiring method Screw terminal
Rated operating current Ie (AC-3, 400V) 9 A
Rated operating power (AC-3, 400V) 4 kW
Main contact withstand voltage 690 V AC
Main contact pole number 3-pole (3NO)
Contactor size class S0
Rated insulation voltage Ui 690 V
Mechanical life 10 million cycles