# Soft Starting Device, 400 VAC, 3 Phase, 90 mm x 105 mm x 55 mm, SENTRON Series
**URL**: https://novapart.co/products/5TT3440/soft-starting-device-400-vac-3-phase-90-mm-x-105
**SKU**: 5TT3440
**Manufacturer**: SIEMENS
**Category**: Automation & Process Control || Process Controllers, Programmers & Indicators || Controllers || Controller Accessories
**Price**: €279.3600
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3555022/)
**5TT3440**
**Data sheet**
Soft starting device 400 V AC 300-5500W 3PH Overall depth 55 mm
**==> picture [510 x 412] intentionally omitted <==**
**----- Start of picture text -----**
||||
|---|---|---|
|ees|Model|
|product brand name|SENTRON|
|product designation|Soft-starting device|
|design of the product|55 mm|
|ees|Supply voltage|
|operating voltage rated value|
|● minimum|230 V|
|● maximum|230 V|
|protection class IP|IP20|
|ns|Dissipation|
|power loss [W]|4.6 W|
|power loss [W] for rated value of the current at AC in hot|4.6 W|
|operating state per pole|
|Control current|
|ns|
|control supply voltage|
|● at AC at 50 Hz rated value minimum|230 V|
|● at AC at 50 Hz rated value maximum|230 V|
|● at AC at 60 Hz rated value minimum|230 V|
|● at AC at 60 Hz rated value maximum|230 V|
|Product function|
|ee|
|product function motor overload protection|No|
|ees|Mechanical Design|
|height|90 mm|
|width|105 mm|
|depth|55 mm|
|Net Weight|444 g|
|Environmental conditions|
|Ost|
|ambient temperature without derating rated value|55 °C|
|ee|Approvals Certificates|
|Environment|General Product Approval|
|Environmental Con-|Environmental Con-|Confirmation|
|firmations|firmations|
**----- End of picture text -----**
**other**
Subject to change without notice © Copyright Siemens
5TT3440 Page 1/3
6/4/2026
Confirmation Miscellaneous ~~—_ ——~~
## **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=5TT3440 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/5TT3440 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)** https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5TT3440 **CAx-Online-Generator** https://www.siemens.com/cax
**Tender specifications** https://www.siemens.com/specifications
**Characteristic curves** https://curves.simaris.siemens.com/curves/
**last modified:**
4/12/2025
Subject to change without notice © Copyright Siemens
5TT3440 Page 2/3
6/4/2026
Subject to change without notice © Copyright Siemens
5TT3440 Page 3/3
6/4/2026
## Links
- [View this product on Novapart](https://novapart.co/products/5TT3440/soft-starting-device-400-vac-3-phase-90-mm-x-105)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/5tt3440/controller-accessories/dp/3555022)
---
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