Siemens 3RT1955-5AP31 SIRIUS Contactor Replacement Coil / Withdrawable Drive, 220-240V AC/DC Original Brand New

Overview: Siemens 3RT1955-5AP31 Solenoid Coil

The Siemens 3RT1955-5AP31 is a high-performance, withdrawable solenoid coil (or drive) designed as a spare part or replacement for the SIRIUS 3RT105 and 3RT145 power contactors. As part of the highly reliable SIRIUS modular system, this magnet coil is essential for the electrical operation of your industrial contactors.

Key Technical Specification

• Product Brand: SIRIUS
• Product Designation: Changeover Operating Mechanism / Magnet Coil
• Contactor Compatibility: Siemens 3RT105 and 3RT145 Contactors (Size S6)
• Control Supply Voltage (UC): $220\dots 240$ V AC/DC
  • AC (50/60 Hz): $220-240$ V
  • DC: $220-240$ V
• Operating Mechanism: Standard, Economy Circuit
• Connection Type: Screw Terminal
• Apparent Pick-up Power (AC): $300$ VA (at 50/60 Hz)
• Apparent Holding Power (AC): $5.8$ VA (at 50/60 Hz)
• Weight: $0.546$ kg

Benefit

• Cost-Effective Maintenance: Instead of replacing the entire contactor, this replacement coil kit offers a low-cost, high-value alternative to restore full functionality to your SIRIUS 3RT1 contactors.
• Universal Control Voltage (UC): The AC/DC (UC) multi-voltage capability simplifies inventory and spares management, as a single coil can be used for both AC and DC control circuits within the specified voltage range.
• Easy Installation: Designed as a “withdrawable drive” for size S6 contactors, the coil can typically be replaced quickly and easily without needing to remove the contactor from the mounting panel.
• High Reliability: Manufactured by Siemens under the SIRIUS product line, this coil is engineered for a long service life and high switching reliability in demanding industrial environments.

Function & Application

The 3RT1955-5AP31 functions as the electromagnetic actuator for the compatible SIRIUS power contactors. It is responsible for drawing in the armature to close the main contacts when the control voltage ($220-240$ V AC or DC) is applied.

It is an indispensable spare part for various industrial applications, including:

• Motor control (start/stop)
• Switching heating elements
• Lighting control systems
• Any industrial process requiring high-current switching using 3RT105 and 3RT145 contactors.

Keep your critical control systems running efficiently with the genuine Siemens 3RT1955-5AP31 replacement solenoid coil.

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