Product Description

Siemens 3RA2921-1AA00 Link Module for 3RV2 to 3RT2 – S0, AC, Screw Terminal

The Siemens 3RA2921-1AA00 is a SIRIUS link module for screw-terminal connections, designed to provide an electrical and mechanical connection between compatible 3RV2 motor starter protectors/circuit breakers and 3RT2 contactors. Siemens specifies this exact article for S00/S0 motor starter protectors to S0 contactors, with AC contactor operation, and supplies it in single-unit packaging.

For SB Smart, this product is positioned as a Siemens industrial electrical accessory for product supply, procurement, panel-building and replacement requirements, without claiming automation integration or automation-service work.

Siemens SIRIUS 3RA2921-1AA00 Link Module

The 3RA2921-1AA00 belongs to the Siemens SIRIUS 3RA29 load-feeder and connection accessory range. Its primary function is to establish a standardized electrical and mechanical connection between a compatible 3RV2 motor starter protector and 3RT2 contactor.

This can help simplify the assembly of compact motor starters and load-feeder arrangements.

Designed for 3RV2 Motor Starter Protectors and 3RT2 Contactors

Siemens specifies the 3RA2921-1AA00 for connection between:

• 3RV2 motor starter protectors/circuit breakers

• 3RT2 contactors

For this exact article, the motor starter protector side supports Size S00/S0, while the contactor side is Size S0. Siemens specifies the corresponding contactor operation as AC.

The exact 3RV2 and 3RT2 article numbers should be checked for compatibility before ordering.

Screw-Terminal Configuration

The 3RA2921-1AA00 is the screw-terminal version of the link module. Siemens lists this article specifically under link modules for motor starter protector to contactor with screw terminals.

This makes it suitable for compatible Siemens devices using the corresponding screw-terminal connection system.

Electrical and Mechanical Connection

The link module provides both an electrical and mechanical connection between the compatible motor starter protector and contactor.

This can help provide:

• Standardized component alignment

• Reduced interconnection work

• Consistent assembly

• Simplified panel construction

• Easier replacement of compatible accessories

The module is intended to be used only with the specified compatible Siemens devices and configurations.

S00/S0 to S0 Configuration

Siemens identifies the exact 3RA2921-1AA00 as the link module for S00/S0 motor starter protectors to S0 contactors.

This configuration is especially relevant for compact SIRIUS motor-starter and load-feeder arrangements.

The applicable current limit for link modules is up to 32 A for Size S0, while the general SIRIUS link-module family also includes versions for other sizes. The actual application must remain within the ratings of all connected components.

AC Contactor Version

The 3RA2921-1AA00 is specified for AC-operated S0 contactors. Siemens lists the similar 3RA2921-1BA00 as the corresponding S0 version for DC/AC-DC contactor operation.

Therefore, the contactor operating system should be checked carefully before selecting the link module.

Three-Pole Link Module

The Siemens SIRIUS link-module arrangement is intended for three-phase motor-starter assemblies. The exact 3RA2921-1AA00 is used to connect compatible three-pole motor starter protector and contactor combinations in the SIRIUS system.

This makes the module suitable for common three-phase motor-control applications.

Single-Unit Packaging

The 3RA2921-1AA00 is supplied as a single-unit package, with a packaging quantity of 1 piece. Siemens lists this article under the single-unit packaging category.

Single-unit packaging is useful for:

• Replacement requirements

• Maintenance orders

• Individual component sourcing

• Panel-building procurement

• Spare-parts requirements

Suitable for SIRIUS Load Feeders

The 3RA2921-1AA00 is used within Siemens 3RA load-feeder configurations, where the motor starter protector and contactor are assembled as a coordinated motor-control arrangement. Siemens' current catalog shows the article as a dedicated link module in the SIRIUS load-feeder system.

It is therefore relevant for industrial motor starters, control cabinets and electrical distribution assemblies using compatible SIRIUS components.

Industrial Applications

Motor Starter Assemblies

The link module can be used to connect a compatible 3RV2 motor starter protector with an S0 3RT2 contactor.

Load Feeders

It is suitable for standardized SIRIUS load-feeder arrangements in electrical control panels.

Pumps

Compatible motor starters for pumps can use the module as part of the protection and switching assembly.

Fans and Blowers

The accessory can be incorporated into compatible S0 motor-control arrangements.

Conveyors

It can be used in motor starter assemblies for conveyor equipment.

Machine and Production Equipment

The standardized SIRIUS connection is suitable for compatible industrial machinery and production equipment.

Suitable for OEMs, Panel Builders and Electrical Dealers

The 3RA2921-1AA00 is suitable for OEM equipment manufacturers, electrical panel builders, industrial maintenance teams, industrial buyers and electrical product dealers.

For SB Smart, the product is best positioned around industrial electrical product supply, dealer/distributor procurement and replacement sourcing, without claiming automation integration or automation-service work.

SB Smart supplies Siemens industrial electrical accessories and motor-control components for procurement requirements across Faridabad, Delhi NCR, Gurgaon/Gurugram, Noida, Haryana, Punjab, Mumbai and other major Indian cities.

Key Features

• Siemens SIRIUS link module

• Article number 3RA2921-1AA00

• Designed for screw-terminal connections

• Connection between compatible 3RV2 motor starter protectors and 3RT2 contactors

• Motor starter protector side: S00/S0

• Contactor side: S0

• AC contactor version

• Electrical and mechanical connection

• Suitable for SIRIUS load-feeder assemblies

• Suitable for compatible three-phase motor starters

• Single-unit packaging

• Packaging quantity: 1 piece

• Suitable for industrial procurement and replacement applications

Benefits

• Standardized connection: Provides a dedicated Siemens connection between compatible motor protection and switching devices.

• Screw-terminal compatibility: Suitable for the corresponding screw-terminal SIRIUS components.

• S00/S0 to S0 configuration: Designed for compact SIRIUS motor-starter assemblies.

• AC contactor application: Suitable for the specified AC-operated S0 contactors.

• Electrical and mechanical linking: Helps organize the complete assembly.

• Single-unit supply: Convenient for replacement and individual procurement.

• Compact load-feeder accessory: Suitable for industrial control-panel applications.

• Siemens SIRIUS compatibility: Designed specifically for the listed SIRIUS product families.

Why Choose Siemens 3RA2921-1AA00?

The Siemens 3RA2921-1AA00 is a dedicated SIRIUS link module for screw-terminal connections, intended to connect compatible 3RV2 motor starter protectors with S0 3RT2 contactors in load-feeder and motor-starter arrangements. Siemens specifies the exact article for S00/S0 motor starter protectors, S0 contactors and AC contactor operation.

Its single-unit packaging makes it particularly suitable for customers who need an individual replacement or a specific accessory for a Siemens motor-starter assembly.

For SB Smart, this product is best presented as a Siemens industrial electrical accessory for supply and procurement, suitable for industrial buyers, panel builders, maintenance teams and electrical dealers.

Delivery Across India

SB Smart supplies Siemens industrial electrical products and accessories across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and other major cities across India.

Major delivery locations include:

• Faridabad

• Delhi

• Gurgaon/Gurugram

• Delhi NCR

• Noida

• Greater Noida

• Haryana

• Punjab

• Mumbai

• Pune

• Ahmedabad

• Bengaluru

• Hyderabad

• Chennai

• Kolkata

• Jaipur

• Chandigarh

• Lucknow

• Indore

• Surat

• Vadodara

• Nagpur

• Coimbatore

• And other major cities across India

Frequently Asked Questions

1. What is Siemens 3RA2921-1AA00?

It is a Siemens SIRIUS link module for connecting compatible 3RV2 motor starter protectors with 3RT2 S0 contactors using screw-terminal connections.

2. Which motor starter protectors are compatible?

Siemens specifies the link module for compatible 3RV2 motor starter protectors/circuit breakers in S00/S0 sizes.

3. Which contactor size is supported?

The contactor side is specified for Size S0.

4. Is it for AC or DC contactors?

The exact 3RA2921-1AA00 is for AC-operated S0 contactors.

5. What type of connection does it use?

It is designed for screw-terminal connections.

6. What is the purpose of the link module?

It provides the electrical and mechanical connection between the compatible motor starter protector and contactor.

7. Is it supplied individually?

Yes. Siemens specifies single-unit packaging with one piece per package.

8. Can it be used in SIRIUS load feeders?

Yes. Siemens lists the 3RA2921-1AA00 as a link module used within SIRIUS load-feeder configurations.

9. Is it suitable for replacement requirements?

Yes. Single-unit packaging makes it suitable for individual replacement and maintenance procurement.

10. Where can I buy Siemens 3RA2921-1AA00 in India?

SB Smart supplies Siemens industrial electrical products and accessories in India, including SIRIUS link modules, load-feeder accessories and related motor-control components for industrial procurement and replacement requirements.