LZS:RT78726

**LZS:RT78726** 

**Data sheet** 

|~~oo~~|plug-in socket for RT relay base with logical isolation, screw terminal<br>~~oo~~|
|---|---|
|**product brand name**<br>~~oo~~|SIRIUS<br>~~oo~~|
|**product type designation**<br>~~oo~~|LZS<br>~~oo~~|
|**General technical data**<br>~~oo~~||
|**display version LED**<br>~~oo~~|No<br>~~oo~~|
|**reference code according to IEC 81346-2**|U|
|**Substance Prohibitance(Date)**|05/01/2012|
|**Net Weight**|43g|
|**Mechanical data**||
|**product componentplug-in socket**|Yes|
|**design of the snap-on socket base**|Socket with logic isolation|
|**design of the relay operating mechanism**|poled|
|**Auxiliary circuit**||
|**number of NC contacts for auxiliary contacts**|0|
|**number of NO contacts for auxiliary contacts**|0|
|number of CO contacts for auxiliarycontacts|0|
|**Connections/ Terminals**||
|**product function removable terminal**|No|
|**type of electrical connection**|screw terminal|
|**type of connectable conductor cross-sections**||
|● solid|1x(1,0 ... 2,5), 2x 1,0, 2x 1,5, 2x 2,5|
|● finelystranded with core endprocessing|1x(1.0 ... 1.5), 2x 1.0, 2x 1.5|
|● for AWG cables solid|1x(18 ... 14), 2x 18, 2x 16, 2x 14|
|**connectable conductor cross-section**||
|● solid|1 ... 2.5 mm²|
|● finelystranded with core endprocessing|1 ... 1.5 mm²|
|**AWG number as coded connectable conductor cross**<br>**section**||
|● solid|18 ... 14|
|tighteningtorque with screw-type terminals|0.5 ... 0.7 N·m|
|**Installation/ mounting/ dimensions**||
|**mounting position**|any|
|**fastening method**|snap-on mounting|
|**height**|77 mm|
|**width**|15.5 mm|
|**depth**|61.5 mm|
|**required spacing**||
|● with side-by-side mounting||
|— forwards|0 mm|
|— backwards|0 mm|



LZS:RT78726 Page 1/5 

Subject to change without notice © Copyright Siemens 

5/10/2026 

— upwards 0 mm — downwards 0 mm — at the side 0 mm ● for grounded parts — forwards 0 mm — backwards 0 mm — upwards 0 mm — at the side 0 mm — downwards 0 mm ● for live parts — forwards 0 mm — backwards 0 mm — upwards 0 mm — downwards 0 mm — at the side 0 mm **Ambient conditions** ~~|~~ **ambient temperature** ● during operation -40 ... +70 °C ● during storage -20 ... +70 °C ● during transport -20 ... +70 °C ~~pT~~ **Approvals Certificates Environment General Product Approval other** Environmental ConConfirmation firmations ~~or~~ 

## **other** 

Confirmation 

**Further information** ~~OO—C™SCSC“‘CC;CéiéCs~~ **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=LZS:RT78726 **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=LZS:RT78726 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/LZS:RT78726 

**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=LZS:RT78726&lang=en 

LZS:RT78726 Page 2/5 

Subject to change without notice © Copyright Siemens 

5/10/2026 

**==> picture [511 x 360] intentionally omitted <==**

LZS:RT78726 Page 3/5 

Subject to change without notice © Copyright Siemens 

5/10/2026 

LZS:RT78726 Page 4/5 

Subject to change without notice © Copyright Siemens 

5/10/2026 

**==> picture [390 x 333] intentionally omitted <==**

**----- Start of picture text -----**<br>
-U<br>last modified: 10/22/2025<br>A1 11 21<br>A2 12 14 22 24<br>**----- End of picture text -----**<br>


LZS:RT78726 Page 5/5 

Subject to change without notice © Copyright Siemens 

5/10/2026