3RT2023-2BB44

Siemens 3RT2023-2BB44 DC24V spring-loaded electromagnetic contactor (2NO+2NC) 9A/4kW
Siemens 3RT2023-2BB44 DC24V spring-loaded electromagnetic contactor (2NO+2NC) 9A/4kW

Siemens SIRIUS 3RT2023-2BB44, S0 frame, DC24V coil, spring-loaded (screwless) terminal blocks, built-in 2 sets of normally open and 2 sets of normally closed auxiliary contacts, AC-3 rated 9A/4kW.

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Product Introduction
Product Positioning

The 3RT2023-2BB44 is a standard electromagnetic contactor with the smallest frame (S0) in the Siemens SIRIUS 3RT2 series. Its main circuit has an AC-3 rated current of 9A and a rated power of 400V/4kW. The three-pole main contacts can be directly used for on/off control of small motors or loads. A key difference in this model is the use of spring-loaded (cage clamp, screwless) terminals. Wiring is simple; just press the wire in to complete the connection, significantly reducing panel wiring and maintenance time. The auxiliary contacts include two normally open (NO) and two normally closed (NC) contacts, facilitating the simultaneous acquisition of multiple interlocking and indication signals, making it suitable for control panel designs requiring numerous auxiliary circuits.

Core Product Advantages and Features
Spring-loaded terminal blocks
Both the main circuit and the auxiliary circuit use spring-loaded terminals, eliminating the need for screw fastening. This allows for fast wiring and prevents loosening due to vibration, making it suitable for mass-produced panels and applications requiring frequent maintenance.
2NO+2NC auxiliary contacts
It has two sets of normally open and two sets of normally closed auxiliary contacts built in, which can simultaneously provide self-holding circuits, interlocking signals and status indications, reducing the need for additional auxiliary contact modules.
S0 small frame, 9A/4kW
The main contact AC-3 has a rated current of 9A and a rated power of 4kW at 400V, conforming to IEC/EN 60947-4-1. The three-pole design is suitable for switching applications of small motors and electric heating loads.
690V insulation, IP20 protection
With a rated insulation voltage of 690V and a rated impulse withstand voltage of 6kV, it features IP20 protection on the front and a finger-proof structure to prevent electric shock. Its mechanical life reaches 10 million cycles, making it suitable for long-term use in industrial distribution boxes.
project Specification
model 3RT2023-2BB44
Coil rated voltage DC 24 V
Coil type DC electromagnetic coil
Auxiliary contact configuration 2 NO + 2 NC (Instantaneous Type)
Wiring method Screwless spring clamp terminals
Rated operating current Ie (AC-3, 400V) 9 A
Rated operating power (AC-3, 400V) 4 kW
Rated operating power (AC-3, 690V) 7.5 kW
Main contact pole number 3-pole (3NO)
Contactor size class S0
External dimensions (width x height x depth) 45 x 85 mm, depth approximately 97 mm (AC coil) or 107 mm (DC coil) depending on coil type.
Rated insulation voltage Ui 690 V
Rated impulse withstand voltage Uimp 6 kV
Mechanical life 10 million cycles
Protection level IP20 (Front-side touch protection, conforms to finger-proof electric shock structure)