The Siemens 3RA1921-1DA00 is a SIRIUS link module designed for the electrical and mechanical connection of compatible 3RV2.1/3RV2.2 motor starter protectors with 3RT2.1 contactors. It is suitable for AC and DC operated contactors, uses a three-pole configuration, and is designed for S00 contactor applications. Siemens lists the exact article as an active product with individual-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.
The 3RA1921-1DA00 belongs to the Siemens SIRIUS 3RA19 mounting accessory range. Its primary function is to create both an electrical and mechanical connection between compatible motor starter protectors and contactors. Siemens specifies the exact module for 3RV2.1/3RV2.2 and 3RT2.1 devices.
This dedicated connection accessory can simplify the assembly of compact motor starters and load-feeder configurations.
The 3RA1921-1DA00 is designed for compatible 3RV2.1 and 3RV2.2 motor starter protectors/circuit breakers.
Siemens specifies the circuit-breaker side for Size S00 and S0 devices, making this link module suitable for compatible SIRIUS motor-protection configurations.
The exact 3RV2 article should be checked against the Siemens compatibility documentation before ordering.
The link module is designed for use with 3RT2.1 contactors, with the contactor side specified as Size S00.
This allows a compatible 3RV2 motor starter protector and S00 3RT2 contactor to be mechanically and electrically linked as part of a motor-starter assembly.
The main purpose of the 3RA1921-1DA00 is to provide both:
Electrical connection:
Creates the required connection between the compatible motor starter protector and contactor.
Mechanical connection:
Helps physically align and connect the compatible SIRIUS components.
Using a dedicated Siemens link module can help simplify assembly and maintain a standardized arrangement within a compatible motor starter or load-feeder configuration.
The exact 3RA1921-1DA00 is specified for AC and DC operation of the compatible contactor. Siemens' Industry Mall description explicitly identifies the article for 3RT2.1 AC and DC operation.
This makes the accessory suitable for compatible Siemens contactor configurations with either AC or DC operating systems, subject to the specific contactor article.
The 3RA1921-1DA00 is intended for a Size S00 contactor. Siemens identifies the circuit-breaker side as S00/S0 and the contactor side as S00.
This compact arrangement is useful where a motor starter needs to combine motor protection and contactor switching in a space-efficient assembly.
Siemens specifies the 3RA1921-1DA00 as a three-pole link module.
The three-pole construction is suitable for compatible three-phase motor starter and load-feeder assemblies.
Siemens' SIRIUS load-feeder documentation lists the 3RA1921-1DA00 for a motor starter protector-to-contactor arrangement in Size S00, with a maximum rated current of 16 A for this link-module version.
The complete assembly must always remain within the ratings of the connected motor starter protector, contactor, wiring and other protection components.
The 3RA1921-1DA00 is part of the SIRIUS link-module range for compatible terminal configurations. Siemens documentation lists it as the link module for a motor starter protector to contactor in Size S00, while the broader load-feeder documentation distinguishes the screw-type connection system from other connection versions.
Before purchasing, the terminal configuration of the selected 3RV2 and 3RT2 devices should be verified.
The 3RA1921-1DA00 is supplied in individual-unit packaging.
Siemens specifies:
Quantity unit: 1 piece
Packaging quantity: 1
Net weight: approximately 0.030 kg
Packaging dimensions: approximately 63 × 83 × 46 mm
Single-unit packaging makes the product convenient for individual replacement, maintenance and procurement requirements.
The exact 3RA1921-1DA00 is currently listed by Siemens as PLM PM300: Active Product. Siemens' current Industry Mall records from February 2026 confirm the article number and product designation.
This makes the exact article relevant for current procurement and replacement requirements.
The 3RA1921-1DA00 is used within Siemens SIRIUS motor-starter and load-feeder arrangements.
Siemens documentation lists this article for connecting a motor starter protector to a contactor in Size S00, with the S00 arrangement rated up to 16 A.
This provides a standardized accessory solution for compatible SIRIUS assemblies.
The link module can be used to connect a compatible 3RV2 motor starter protector with an S00 3RT2 contactor.
It can be incorporated into suitable motor starter assemblies for pump applications.
Suitable for compatible SIRIUS motor-protection and contactor combinations.
Can be used in compact motor starter assemblies for conveyor equipment.
Useful for motor-control panels using compatible Siemens SIRIUS components.
Suitable for industrial machinery requiring coordinated motor protection and switching.
The 3RA1921-1DA00 is suitable for OEM equipment manufacturers, electrical panel builders, industrial maintenance teams, industrial buyers and electrical product dealers.
For SB Smart, this product is best positioned around industrial electrical product supply, dealer/distributor procurement and replacement sourcing, rather than 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.
Siemens SIRIUS link module
Article number 3RA1921-1DA00
Electrical and mechanical connection
Designed for 3RV2.1 / 3RV2.2
Designed for 3RT2.1 contactors
Circuit-breaker side: S00/S0
Contactor side: S00
AC and DC contactor operation
Three-pole construction
Suitable for SIRIUS load-feeder assemblies
Maximum rated current up to 16 A for the specified S00 arrangement
Individual-unit packaging
Packaging quantity: 1 piece
Net weight approximately 0.030 kg
Active Siemens product
Electrical and mechanical linking: Provides a dedicated connection between compatible Siemens motor-protection and switching devices.
3RV2 compatibility: Designed for compatible 3RV2.1 and 3RV2.2 motor starter protectors.
3RT2 compatibility: Designed for compatible 3RT2.1 contactors.
AC/DC operation: Supports compatible contactors with AC or DC operating systems.
Compact S00 arrangement: Suitable for space-conscious motor-starter assemblies.
Three-pole construction: Suitable for compatible three-phase motor applications.
Individual packaging: Convenient for replacement and single-component procurement.
Standardized SIRIUS accessory: Helps maintain a consistent Siemens component arrangement.
The Siemens 3RA1921-1DA00 is a dedicated electrical and mechanical link module for compatible 3RV2.1/3RV2.2 motor starter protectors and 3RT2.1 S00 contactors. Siemens specifies the module for AC and DC operation, with a three-pole design and S00 contactor application.
Its S00 configuration, individual-unit packaging and compatibility with Siemens SIRIUS motor-starter components make it suitable for customers looking to buy replacement accessories or assemble compatible industrial motor-control equipment.
For SB Smart, this product should be presented as a Siemens industrial electrical accessory for supply and procurement, suitable for industrial buyers, panel builders, maintenance teams and electrical dealers.
SB Smart supplies Siemens industrial electrical products and accessories across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and other major Indian cities.
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
It is a Siemens SIRIUS link module that provides an electrical and mechanical connection between compatible 3RV2.1/3RV2.2 motor starter protectors and 3RT2.1 S00 contactors.
Siemens specifies compatible 3RV2.1 and 3RV2.2 devices, with the circuit-breaker side covering S00 and S0 sizes.
The contactor side is specified for Size S00.
Yes. The exact product is specified for AC and DC operation of compatible 3RT2.1 contactors.
The 3RA1921-1DA00 is a three-pole link module.
For the specified S00 motor starter protector-to-S00 contactor arrangement, Siemens lists a maximum rated current of 16 A.
Yes. Siemens lists individual-unit packaging with one piece per package.
The net weight is approximately 0.030 kg.
Yes. Siemens currently lists 3RA1921-1DA00 as an active product.
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.
| Specification | Details |
|---|---|
| Product Name | Link Module |
| Manufacturer | Siemens |
| Series | SIRIUS 3RA |
| Order Code | 3RA1921-1DA00 |
| Product Type | Link Module |
| Packaging Type | Single Unit |
| Function | Electrical & Mechanical Connection |
| Application | Load Feeder Assembly |
| Compatible Series | Siemens 3RA Load Feeders |
| Suitable Devices | Motor Starter Protectors & Contactors |
| Connection Type | Direct Coupling |
| Installation Method | Tool-Assisted Mounting |
| Industrial Application | Yes |
| Panel Integration | Compact Design |
| Maintenance Requirement | Low |
| Product Category | Load Feeder Accessory |
| Brand | Siemens |
| Condition | New & Genuine Product |
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