3RA2942-1A

**3RA2942-1A** 

**Data sheet** 

|||busbar adapter Size S3 for mechanical mounting of circuit breaker and contactor|busbar adapter Size S3 for mechanical mounting of circuit breaker and contactor|busbar adapter Size S3 for mechanical mounting of circuit breaker and contactor|
|---|---|---|---|---|
|||Can be snapped onto standard mounting rail or for screw mounting (multi-unit|||
|||packaging)|||
|**product brand name**||SIRIUS|||
|**product category**||DIN-rail adapter|||
|**product designation**||DIN rail adapter|||
|**product type designation**||3RA29|||
|**General technical data**<br>~~eee~~|||||
|**material**||plastic|||
|**certificate of suitability**||CE / UL / CSA|||
|**size of the circuit-breaker**||S3|||
|**size of contactor**||S3|||
|**Substance Prohibitance(day/month/year)**||07/01/2006|||
|**Net Weight**||0.258 kg|||
|**Installation/ mounting/ dimensions**<br>~~eee~~|||||
|**fastening method**||screw and snap-on mountingonto 35 mm DIN rail|||
|**height**||332.5 mm|||
|**width**||70 mm|||
|**depth**||23.3 mm|||
|**Approvals Certificates**<br>~~ee~~|||||
|**Environment**|**General Product Approval**||**Test Certificates**|**Maritime application**|
|Environmental Con-<br>firmations<br>~~_~~|FL<br><€||Special Test Certific-<br>ate<br>~—|©|
|**Maritime application**|||||
|**other**||**Railway**|||
|Confirmation<br>~~—~~|Confirmation<br>||Special Test Certific-|||
|||ate|||



**Further information** ~~eC~~ **Information on the packaging** https://support.industry.siemens.com/cs/ww/en/view/109813875 **Information for data generation and storage** https://support.industry.siemens.com/cs/ww/en/view/109995012 **Information- and Downloadcenter (Catalogs, Brochures,…)** https://www.siemens.com/ic10 **Industry Mall (Online ordering system)** https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3RA2942-1A **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RA2942-1A **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RA2942-1A 

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Subject to change without notice © Copyright Siemens 

3RA29421A Page 1/2 

5/31/2026 

https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RA2942-1A&lang=en 

**last modified:** 10/22/2025 

Subject to change without notice © Copyright Siemens 

3RA29421A Page 2/2 

5/31/2026