Siemens 3RT20232BB443MA0 Contactor
3RT2023 series S0 frame contactors
The 3RT20232BB443MA0 sits in Siemens' 3RT2023 S0 contactor family with a 9 A contact rating and 24 VDC coil. Base product 3RT2023 is shared across all listed alternates.
24 VDC coil and contact specifications
| Parameter | Value |
|---|---|
| Coil Voltage | 24 VDC |
| Coil Power | 5.9 W |
| Must Operate Voltage | 19.2 VDC |
| Coil Resistance | — (not specified) |
| Contact Form | 3PST-NO (3 Form A) |
| Contact Rating | 9 A |
| Auxiliary Contacts | 2NO + 2NC |
Coil power draw is 5.9 W across the DC-coil variants. The 170 ms operate time is consistent with electromechanical contactors of this frame size. No hold power or sealing current values appear in the source record.
Mechanical mounting and enclosure
Chassis mount with DIN rail adapter is standard for S0 frame. Box encapsulation indicates individual packaging versus bulk. Operating temperature range is 25°C to 60°C—no sub-zero rating appears.
Alternate comparison (same series, DC coil, 9 A)
All listed alternates are Siemens 3RT2023 family parts with 9 A contact rating, chassis/DIN mounting, and matching or equivalent coil power.
| Spec | Seed | 3RT20232BB44 | 3RT20232FB443MA0 |
|---|---|---|---|
| Coil Voltage | 24 VDC | 24 VDC | 24 VDC |
| Auxiliary Contacts | 2NO/2NC | 2NO/2NC | 2NO/2NC |
| Encapsulation | Box | Box | Box |
| Operate Time | 170 ms | 170 ms | 170 ms |
| Similarity | — | 1.0 | 1.0 |
3RT20232BB44 carries identical specs as the seed; the suffix difference is a packaging/terminal variation. 3RT20232FB443MA0 matches the seed on all recorded specs but uses a different MPN prefix—verify termination style and any supplementary markings before cross-selecting.
The 1NO/1NC variants (3RT20232BB40, 3RT20232BB400CC0) drop one auxiliary contact pair—acceptable where one auxiliary is sufficient for coil-seal or interlock feedback.