# Residual Current Unit, for 5SY Series Circuit Breaker

![Product image](https://novapart.co/image/farnell:3474960/)

**URL**: https://novapart.co/products/5SM2842-8/residual-current-unit-for-5sy-series-circuit
**SKU**: 5SM2842-8
**Manufacturer**: SIEMENS
**Category**: Circuit Protection || Circuit Breakers || Circuit Breaker Accessories
**Price**: €157.3700
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Product Range | SENTRON Series |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3474960/)

**5SM2842-8** 

**Data sheet** 

RC unit for 5SY, 4-pole, type A, selective, In: 40 A, 1000 mA, Un AC: 400 V 

|-<br>enna<br>5=<br>——___<br>in<br>1<br>an<br>=<br>F|<br>P<br>]<br>Figure similar|RC unit for 5SY, 4-pole, type A, selective, In: 40 A, 1000 mA, Un AC: 400 V|
|---|---|
|**Model**||
|**product brand name**|SENTRON|
|**product designation**|RCD-unit|
|**design of theproduct**|Selective|
|**product type designation**|5SM2|
|**product version**|for 5SY|
|**General technical data**||
|**number ofpoles**|4|
|**design ofpole**|4poles|
|**size of installation devices according to DIN 43880**|1|
|**touch protection against electrical shock according to EN**<br>**50274**|Finger and back-of-hand safe|
|**mechanical service life(operating cycles) typical**|10 000|
|**overvoltage category**|III|
|**degree of pollution**|2|
|**Voltage**||
|**type of voltage of the operating voltage**|AC|
|insulation voltage(Ui)rated value|460 V|
|surge voltage resistance rated value|4 000 V|
|**tripping fault current rated value**|1 000 mA|
|||
|**● operational current at AC rated value**|40 A|
|**residual current type**|A|
|**surge current resistance rated value**|5 kA|
|**supply voltage**||
|● at AC|400 V|
|● for testingequipment minimum|195 V|
|**value range of the supply voltage frequency**|50 Hz|
|**value range of the operating frequency**|50/60 Hz|
|**Protection class**||
|**protection class IP**|IP20, if the distribution board is installed, with connected conductors|
|**protection function false tripping**|Yes|
|**Dissipation**||
|**power loss[W]**||
|● for rated value of the current at AC in hot operating state<br>perpole|1.9 W|
|● maximum|5.7 W|
|**Product details**||



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|**product feature OFF-delay time adjustable**|||No||||
|---|---|---|---|---|---|---|
|**product feature rated fault current adjustable**<br>**product feature sealable**<br>~~re~~|||No<br>No||||
|**Connections**|||||||
|**connectable conductor cross-section solid**|||||||
|● minimum|||1.5 mm²||||
|● maximum|||25 mm²||||
|**connectable conductor cross-section stranded**|||||||
|● minimum|||1.5 mm²||||
|● maximum|||25 mm²||||
|**tightening torque with screw-type terminals**|||||||
|● minimum|||2.5 N·m||||
|● maximum<br>~~re~~|||3 N·m||||
|**position of power supply cord**|||top or bottom||||
|**Mechanical Design**|||||||
|**height**|||90 mm||||
|**width**|||72 mm||||
|**depth**|||77 mm||||
|**installation depth**|||70 mm||||
|**number of modular width units**|||4||||
|**fastening method**|||DIN rail||||
|**mounting position**<br>**Net Weight**<br>~~ee~~|||any<br>315g||||
|**Environmental conditions**|||||||
|**ambient temperature during operation**|||||||
|● minimum|||-25 °C||||
|● maximum|||45 °C||||
|**ambient temperature during storage**|||||||
|● minimum|||-40 °C||||
|● maximum|||75 °C||||
|**number of test cycles for environmental testing according**|||28||||
|**to IEC 60068-2-30**|||||||
|**Certificates**<br>~~ee~~|||||||
|**reference code according to IEC 81346-2**|||F||||
|**Approvals Certificates**<br>~~a~~|||||||
|**Environment**|**General Product Approval**||||||
|Environmental Con-<br>firmations<br>Environmental Con-<br>firmations<br>~~——_—~~|||Miscellaneous<br>~~——~~||Miscellaneous<br>~~—~~||
|**General Product Approval**|||||**other**||
|Confirmation<br>FAL|ce|||cA|||
|**other**<br>**Dangerous goods**|||||||
|Confirmation<br>Transport Information|||||||
|**Further information**<br>~~ee~~|||||||
|**Information on the packaging**|||||||
|https://support.industry.siemens.com/cs/ww/en/view/109813875|||||||
|**Information for datageneration and storage**|||||||
|5SM28428||||Subject to change without notice|||
|Page 2/5|||5/31/2026|© Copyright Siemens||© Copyright Siemens|



https://support.industry.siemens.com/cs/ww/en/view/109995012 **Information- and Downloadcenter (Catalogs, Brochures,…)** https://www.siemens.com/lowvoltage/catalogs 

**Industry Mall (Online ordering system)** https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=5SM2842-8 

**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/5SM2842-8 

**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)** https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5SM2842-8 

**CAx-Online-Generator** https://www.siemens.com/cax 

**Tender specifications** https://www.siemens.com/specifications 

## **Characteristic curves** 

https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no> 

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70,3<br>53,8<br>123,9<br>451,<br>99,9<br>**----- End of picture text -----**<br>


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**last modified:** 

4/12/2025 

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## Links

- [View this product on Novapart](https://novapart.co/products/5SM2842-8/residual-current-unit-for-5sy-series-circuit)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/5sm2842-8/circuit-breaker-accessories/dp/3474960)
---

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