Product Description

Siemens SIRIUS Conventional Operating Mechanism AC/DC Coil 110–127 V, S12 Size - 3RT1975-5AF318K

Product Description

The Siemens 3RT1975-5AF318K is a SIRIUS conventional operating mechanism with a universal AC/DC coil, designed for use with compatible Siemens power contactors. It is intended for S12-size contactor applications and operates with a 110–127 V AC/DC control supply at 40–60 Hz. Siemens product price-list documentation identifies this model as the conventional operating mechanism for S12-size SIRIUS contactors.

The 3RT1975-5AF318K is suitable for industrial motor-control panels, electrical control cabinets, machine automation systems, OEM equipment, and maintenance applications where a compatible replacement operating mechanism or coil is required.

Its universal AC/DC coil provides flexibility for control circuits using either AC or DC supply within the specified voltage range. The S12-size construction is designed for compatible larger-frame Siemens SIRIUS power contactor assemblies.

Key Features

• Brand: Siemens

• Product Family: SIRIUS

• Model: 3RT1975-5AF318K

• Product Type: Conventional Operating Mechanism

• Coil Type: AC/DC Conventional Coil

• Rated Control Supply: 110–127 V AC/DC

• Frequency: 40–60 Hz

• Contactor Size: S12

• Operating Mechanism: Conventional

• Application: Compatible Siemens SIRIUS power contactors

• Use: Replacement and maintenance applications

Applications

The Siemens 3RT1975-5AF318K is suitable for:

• Industrial motor-control panels

• SIRIUS power contactor assemblies

• Electrical control cabinets

• Motor starter systems

• Industrial automation equipment

• Machine control panels

• Factory automation systems

• OEM control panels

• Contactor maintenance and replacement

• Industrial switching applications

Benefits

• 110–127 V AC/DC universal control operation

• Suitable for 40–60 Hz applications

• Designed for S12-size SIRIUS contactor systems

• Conventional operating mechanism design

• Suitable for replacement and maintenance requirements

• Compatible with appropriate Siemens SIRIUS contactor assemblies

• Flexible AC/DC control operation

• Genuine Siemens SIRIUS component

• Suitable for industrial and automation applications

Why Choose Siemens 3RT1975-5AF318K?

The Siemens SIRIUS 3RT1975-5AF318K is designed for applications requiring a conventional operating mechanism with a 110–127 V AC/DC universal coil. Its S12 size and 40–60 Hz operating range make it suitable for compatible Siemens SIRIUS power contactors used in industrial control and motor-switching systems.

The universal AC/DC coil provides flexibility when the control circuit may operate from either AC or DC supply within the specified voltage range. This makes the component useful for industrial maintenance, replacement requirements, OEM equipment, electrical panels, and automation systems.

At SB Smart, Faridabad, we supply genuine Siemens SIRIUS power contactors, conventional operating mechanisms, replacement contact sets, thermal overload relays, motor protection relays, motor protection circuit breakers, soft starters, MCCBs, MCBs, and industrial automation products at competitive prices. We provide GST invoices, technical assistance, bulk-order support, secure packaging, and delivery across Faridabad, Delhi NCR, and major cities throughout India.

Whether you are sourcing a Siemens SIRIUS operating mechanism for contactor replacement, industrial maintenance, control-panel assembly, automation equipment, or bulk procurement, SB Smart provides product assistance and nationwide supply support.

Frequently Asked Questions

Q1. What is Siemens 3RT1975-5AF318K?
It is a Siemens SIRIUS conventional operating mechanism with a universal AC/DC coil for compatible power contactor assemblies.

Q2. What is the control voltage?
The operating mechanism is specified for 110–127 V AC/DC.

Q3. What is the operating frequency?
It is specified for a 40–60 Hz frequency range for AC operation.

Q4. What is the contactor size?
The 3RT1975-5AF318K is designed for S12-size SIRIUS contactor applications.

Q5. Is it an AC or DC coil?
It is a universal AC/DC conventional coil, allowing AC or DC operation within the specified voltage range.

Q6. Is 3RT1975-5AF318K a complete power contactor?
No. It is a conventional operating mechanism/coil component intended for compatible Siemens SIRIUS power contactor assemblies.

Q7. Where is it used?
It is used with compatible SIRIUS power contactors in industrial motor control, automation panels, electrical control cabinets, OEM equipment, and maintenance applications.

Q8. Where can I buy Siemens 3RT1975-5AF318K in India?
SB Smart, Faridabad supplies Siemens SIRIUS contactors, operating mechanisms, spare parts, and industrial electrical and automation products with GST billing, technical assistance, bulk-order support, secure packaging, and delivery across India.