5SM2645-8

**5SM2645-8** 

**Data sheet** 

RC unit for 5SY, 4-pole, type A, selective, In: 63 A, 300 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**|Finger and back-of-hand safe|
|**50274**||
|**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**|300 mA|
|||
|**● operational current**||
|**— at 40 °C rated value**|58.6 A|
|— at 45 °C rated value|58.59 A|
|— at 50 °C rated value|56.7 A|
|— at 55 °C rated value|54.81 A|
|— at 60 °C rated value|53.55 A|
|— at 65 °C rated value|52.29 A|
|— at 70 °C rated value|50.4 A|
|**● operational current at AC rated value**|63 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**||



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|**protection class IP**<br>~~re~~|**protection class IP**<br>~~re~~|IP20, if the distribution board is installed, with connected conductors<br>~~re~~|
|---|---|---|
|**protection function false tripping**<br>~~re~~||Yes<br>~~re~~|
|**Dissipation**|||
|**power loss[W]**|||
|● for rated value of the current at AC in hot operating state<br>perpole||3 W|
|● maximum||9 W|
|**Product details**<br>~~a~~|||
|**product feature OFF-delay time adjustable**<br>~~a~~<br>~~ee~~||No<br>~~ee~~|
|**product feature rated fault current adjustable**<br>~~ee~~||No<br>~~ee~~|
|**product feature sealable**<br>~~ee~~||No<br>~~ee~~|
|**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<br>~~re~~|
|**position of power supply cord**<br>~~re~~||top or bottom<br>~~re~~|
|**Mechanical Design**|||
|**height**||90 mm|
|**width**||54 mm|
|**depth**||77 mm|
|**installation depth**||70 mm|
|**number of modular width units**||3|
|**fastening method**<br>~~re~~||DIN rail<br>~~re~~|
|**mounting position**<br>~~re~~||any<br>~~re~~|
|**Net Weight**<br>~~re~~||311g<br>~~re~~|
|**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**<br>**to IEC 60068-2-30**<br>~~a~~||28<br>~~a~~|
|**Certificates**<br>~~a~~|||
|**reference code according to IEC 81346-2**<br>~~a~~||F<br>~~a~~|
|**Approvals Certificates**<br>~~a~~|||
|**Environment**<br>~~a~~|**General Product Approval**<br>~~a~~||



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Confirmation Transport Information 

## **Further information** 

**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/lowvoltage/catalogs **Industry Mall (Online ordering system)** https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=5SM2645-8 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/5SM2645-8 

**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)** https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5SM2645-8 **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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**last modified:** 

4/12/2025 

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