# Phase Monitor, 4 A, 230 VAC, IP20, Screw Terminal, SENTRON Series
**URL**: https://novapart.co/products/5TT3421/phase-monitor-4-a-230-vac-ip20-screw-terminal
**SKU**: 5TT3421
**Manufacturer**: SIEMENS
**Category**: Automation & Process Control || Process Controllers, Programmers & Indicators || Controllers || Controller Accessories
**Price**: €78.4700
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3555018/)
**5TT3421**
**Data sheet**
Phase monitor 230 V AC 4 A
|~~{~~|Phase monitor 230 V AC 4 A
~~{~~|
|---|---|
|**Model**
~~|~~||
|**product brand name**
~~|~~|SENTRON
~~|~~|
|**product designation**|Phase monitor|
|**General technical data**
~~|~~||
|**operating range factor of control voltage_1**
~~|~~|0.8
~~|~~|
|**adjustablepickup delay time initial value**|0 s|
|**determinants for climatic applicability according to IEC**
**60068-1**|20/60/4|
|**measurable voltage at AC initial value**
~~Oe~~|400 V
~~Oe~~|
|**switching voltage of the contacts at AC minimum**
~~Oe~~|10 V
~~Oe~~|
|**switching current at AC per contact minimum**
~~Oe~~|100 mA
~~Oe~~|
|**Voltage**||
|**type of voltage of the operating voltage for actuation**|AC|
|**measurable voltage at AC full-scale value**|400 V|
|surge voltage resistance between contacts of the relay
operatingmechanism|2.5 kV|
|**Supply voltage**
~~|~~||
|operatingvoltage at AC rated value
~~|~~|250 V
~~|~~|
|**protection class IP**
~~Oe~~|IP20, with connected conductors
~~Oe~~|
|**operating resourceprotection class**
~~Oe~~|II
~~Oe~~|
|operational current rated value
~~Oe~~|4 A
~~Oe~~|
|**Control current**||
|**control supply voltage**||
|● at DC rated value minimum|0 V|
|● at DC rated value maximum|0 V|
|● at AC at 50 Hz rated value minimum|400 V|
|● at AC at 50 Hz rated value maximum|400 V|
|● at AC at 60 Hz rated value minimum
~~Oc~~|400 V|
|● at AC at 60 Hz rated value maximum
~~Oc~~|400 V|
|**operating range factor of control voltage_2**
~~Oc~~|1.1|
|**Auxiliary circuit**||
|**number of CO contacts for auxiliary contacts**
~~Oc~~|1|
|**number of NC contacts for auxiliary contacts**
~~Oc~~|0|
|**number of NO contacts for auxiliary contacts**
~~Oc~~|0|
|**Adjustable parameters**||
|adjustablepickupdelaytime full-scale value|0 s|
|adjustable OFF-delaytime||
|● initial value|0 s|
|● full-scale value|0 s|
Subject to change without notice © Copyright Siemens
5TT3421 Page 1/4
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|**Product function**
~~a~~|**Product function**
~~a~~|**Product function**
~~a~~|**Product function**
~~a~~|
|---|---|---|---|
|**product function**||||
|● asymmetrydetection|||No|
|●phase failure detection|||Yes|
|●phase sequence recognition|||No|
|● overvoltage detection|||No|
|● undervoltage detection|||No|
|**Number**
~~a~~||||
|**number of terminals with cross-head screw**|||1|
|**Connections**
~~a~~||||
|**type of connectable conductor cross-sections**|||2 × 2.5 mm²(rigid, max.)|
|**type of electrical connection**|||screw terminal|
|● plug-in socket|||No|
|**Mechanical Design**
~~a~~||||
|**height**|||90 mm|
|**width**|||18 mm|
|**depth**|||64 mm|
|**required spacing between contacts of the relay operating**||**required spacing between contacts of the relay operating**|4 mm|
|**mechanism**
~~re~~||||
|**Net Weight**|||0.077 kg|
|**Environmental conditions**||||
|**ambient temperature during operation**||||
|● minimum|||-20 °C|
|● maximum|||60 °C|
|**Approvals Certificates**
~~ee~~||||
|**Environment**||**General Product Approval**||
|Environmental Con-
Environmental Con-|||Confirmation|
|firmations
firmations||||
|**other**||||
|Confirmation||Miscellaneous||
|~~OO~~||||
|QC PASS||||
|**Further information**
~~ee~~||||
|**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=5TT3421||||
|**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)**||||
|https://support.industry.siemens.com/cs/ww/en/ps/5TT3421||||
|**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)**||||
|https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5TT3421||||
|**CAx-Online-Generator**||||
|https://www.siemens.com/cax||||
|**Tender specifications**||||
|https://www.siemens.com/specifications||||
|**Characteristic curves**||||
|https://curves.simaris.siemens.com/curves/||||
Subject to change without notice © Copyright Siemens
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L1 N L2 L3 12 14 11 18 5 43 ~~i~~ i ~~r~~ 64 ~~6a~~ **last modified:** 4/12/2025 G
Subject to change without notice © Copyright Siemens
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Subject to change without notice © Copyright Siemens
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## Links
- [View this product on Novapart](https://novapart.co/products/5TT3421/phase-monitor-4-a-230-vac-ip20-screw-terminal)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/5tt3421/controller-accessories/dp/3555018)
---
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