Siemens 3TB4212-0A Contactor 220 V – 3-Pole AC Motor Contactor
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Product Information
The Siemens 3TB4212-0A is a three-pole IEC electromagnetic motor contactor from the Siemens 3TB42 product family. It is designed for switching and controlling three-phase AC motors in industrial machinery, motor starter assemblies and control panels. The contactor has a 220 V AC control coil and three main power poles for switching the motor phases.
For a replacement contactor, confirm that the installed control circuit provides a matching 220 V AC coil supply and that the motor application matches the 3TB4212-0A ratings. The device has a 30 A continuous current rating and a maximum operational voltage of 500 V AC. It supports motor loads up to 5 HP at 230 V AC, three-phase, or up to 10 HP at 460 V AC, three-phase. Matching the part number, coil voltage, pole configuration, current rating, motor power and operating voltage helps preserve existing panel wiring where the application conditions are suitable.
The Siemens 3TB4212-0A is a discontinued legacy contactor used for maintaining installed Siemens 3TB42 motor control equipment. When troubleshooting a failed unit, check the control circuit coil supply, the three-phase motor voltage, the current rating and the motor power before fitting a spare. Also confirm that the replacement has the required three-pole configuration and matches the existing motor starter assembly. Repair or exchange of the contactor can be relevant when restoring an existing machine or control panel.
Technical Specifications
| Manufacturer | Siemens |
| Part number | 3TB4212-0A |
| Model/type | Contactor 220 V |
| Component type | Motor contactor |
| Product family | 3TB42 |
| Contactor design | 3-pole IEC electromagnetic contactor |
| Control coil voltage | 220 V AC |
| Rated current | 30 A |
| Maximum operational voltage | 500 V AC |
| Number of main poles | 3 |
| Motor power rating at 230 V AC, 3-phase | 5 HP |
| Motor power rating at 460 V AC, 3-phase | 10 HP |
| Lifecycle status | Discontinued |
Replacement and Spare Part Considerations
The Siemens 3TB4212-0A is intended for replacement and maintenance of installed Siemens 3TB42 motor starter assemblies and other existing three-phase motor control equipment. Before ordering a spare, compare the part number, 220 V AC coil voltage, three-pole configuration, 30 A current rating, maximum operational voltage and motor power rating with the installed application.
The motor rating is up to 5 HP at 230 V AC, three-phase, or up to 10 HP at 460 V AC, three-phase. A suitable replacement must also match the requirements of the existing control circuit and motor starter assembly. When these specifications match, the replacement can help preserve existing panel wiring and control architecture.
As a discontinued Siemens component, the 3TB4212-0A may be required when maintaining legacy equipment. ABC Industrial Parts can support repair or exchange requirements for installed control equipment where an original replacement contactor is needed.
Frequently Asked Questions
What is the Siemens 3TB4212-0A?
The Siemens 3TB4212-0A is a three-pole IEC electromagnetic motor contactor from the Siemens 3TB42 product family, with a 220 V AC control coil for three-phase motor switching.
What current and voltage is the 3TB4212-0A rated for?
The contactor has a 30 A continuous current rating and a maximum operational voltage rating of 500 V AC.
What motor power can the Siemens 3TB4212-0A switch?
The rated motor capacity is up to 5 HP at 230 V AC, three-phase, or up to 10 HP at 460 V AC, three-phase.
What should be checked before replacing a 3TB4212-0A?
Check the exact part number, 220 V AC coil supply, three-pole configuration, 30 A current rating, operating voltage and motor power against the installed motor starter assembly.
Is the Siemens 3TB4212-0A suitable for legacy Siemens equipment?
Yes. The discontinued 3TB4212-0A is used to maintain installed Siemens 3TB42 motor control assemblies and existing three-phase motor control panels when the application ratings match.
Which applications use the Siemens 3TB4212-0A?
The contactor is used in three-phase motor control applications such as conveyor, pump, fan, compressor, machine tool and general industrial control equipment, provided the application conditions match its ratings.
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Disclaimer:
We are not an authorised distributor of Siemens.
Product photos are for illustration purposes only and may differ from the actual product delivered.
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