# Solid State Relay, DPST-NO, 55 A, 600 VAC, Panel, Screw, Zero Crossing
**URL**: https://novapart.co/products/3RF2255-3AB45/solid-state-relay-dpst-no-55-a-600-vac-panel-screw
**SKU**: 3RF2255-3AB45
**Manufacturer**: SIEMENS
**Price**: €168.0200
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Product Range | SIRIUS 3RF22 Series |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3455125/)
**3RF2255-3AB45**
**Data sheet**
***phase-out type*** semiconductor relay, 3-phase 3RF2 55 A / 40 °C 48-600 V / 4- 30 V DC 2-phase controlled ring cable terminal blocking voltage 1200 V for mounting on available cooling surfaces
|r+~~/~~|***phase-out type*** semiconductor relay, 3-phase 3RF2 55 A / 40 °C 48-600 V / 4-
30 V DC 2-phase controlled ring cable terminal blocking voltage 1200 V for
mounting on available cooling surfaces
~~/~~|
|---|---|
|**product brand name**|SIRIUS|
|**product designation**|solid-state relay|
|**design of theproduct**|2-pole controlled|
|**product type designation**|3RF22|
|**manufacturer's article number**||
|●_2 of the accessories that can be ordered|3RF2900-0EA18|
|**product designation**||
|● _2 of the accessories that can be ordered|converter|
|**General technical data**
~~a~~||
|**product function**
~~a~~|zero-point switching
~~a~~|
|**power loss[W] for rated value of the current**||
|● at AC in hot operatingstate|151 W|
|● at AC in hot operatingstateperpole|151 W|
|● without load current share typical|0.5 W|
|**insulation voltage rated value**|600 V|
|surge voltage resistance of main circuit rated value|6 kV|
|**protection class IP**|IP00|
|protection class IP on the front accordingto IEC 60529|IP00|
|**shock resistance according to IEC 60068-2-27**|15g/ 11 ms|
|**vibration resistance according to IEC 60068-2-6**|2g|
|**reference code according to IEC 81346-2**|Q|
|**Substance Prohibitance(day/month/year)**|07/01/2006|
|**SVHC substance name**|Lead CAS-No. 7439-92-1
Lead monoxide (lead oxide) CAS-No. 1317-36-8
2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one CAS-No. 71868-
10-5
Melamine CAS-No. 108-78-1|
|**Net Weight**|0.14 kg|
|**Main circuit**
~~a~~||
|**number ofpoles for main current circuit**
~~a~~|3
~~a~~|
|**number of NO contacts for main contacts**|2|
|**number of NC contacts for main contacts**|0|
|**type of voltage of the operating voltage**|AC|
|**operating voltage**||
|● at AC||
|— at 50 Hz rated value|48 ... 600 V|
|— at 60 Hz rated value|48 ... 600 V|
|**operating frequency rated value**|50 ... 60 Hz|
|**relative symmetrical tolerance of the operating frequency**|10 %|
|**operating range relative to the operating voltage at AC**||
Subject to change without notice © Copyright Siemens
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|● at 50 Hz|40 ... 660 V|
|---|---|
|● at 60 Hz|40 ... 660 V|
|**operational current rated value maximum**|55 A|
|**operational current**||
|● at AC-1 at 400 V rated value|55 A|
|● at AC-51 rated value|50 A|
|● accordingto UL 508 rated value|55 A|
|**ampacity maximum**|55 A|
|**operational current minimum**|500 mA|
|**rate of voltage rise at the thyristor for main contacts**
**maximumpermissible**|100 V/µs|
|**blocking voltage at the thyristor for main contacts**
**maximumpermissible**|1 200 V|
|**reverse current of the thyristor**|10 mA|
|**derating temperature**|40 °C|
|**surge current resistance rated value**|600 A|
|**I2t value maximum**|1 800 A²·s|
|**Control circuit/ Control**||
|**type of voltage of the control supply voltage**|DC|
|**control supply voltage 1 at DC**|4 ... 30 V|
|**control supply voltage at DC**||
|● initial value for signal <1> detection|4 V|
|● full-scale value for signal<0> recognition|1 V|
|**control current at minimum control supply voltage**||
|● at DC|22 mA|
|control current at DC rated value|30 mA|
|**ON-delay time**|1 ms; additionallymax. one half-wave|
|**OFF-delay time**|1 ms; additionallymax. one half-wave|
|**Installation/ mounting/ dimensions**||
|fasteningmethod side-by-side mounting|Yes|
|**fastening method**|screw fixing|
|**design of the thread of the screw for securing the**
**equipment**|M4|
|**tightening torque of fixing screw maximum**|1.5 N·m|
|**tightening torque[lbf·in] of fixing screw maximum**|13 lbf·in|
|**height**|95 mm|
|**width**|45 mm|
|**depth**|47 mm|
|**Connections/ Terminals**||
|**product component removable terminal for auxiliary and**
**control circuit**|Yes|
|**type of electrical connection**||
|● for main current circuit|Ringcable lugconnection|
|● for auxiliaryand control circuit|screw-type terminals|
|**type of connectable conductor cross-sections**||
|● for auxiliaryand control contacts||
|— solid|1x(0.5 ... 2.5 mm²), 2x(0.5 ... 1 mm²)|
|— finelystranded with core endprocessing|1x(0.5 ... 2.5 mm²), 2x(0.5 ... 1 mm²)|
|— finelystranded without core endprocessing|1x(0.5 ... 2.5 mm²), 2x(0.5 ... 1 mm²)|
|● for AWG cables for auxiliaryand control contacts|1x(20 ... 12)|
|**tightening torque**||
|● for main contacts with screw-type terminals|2 ... 2.5 N·m|
|● for auxiliary and control contacts with screw-type
terminals|0.5 ... 0.6 N·m|
|**tightening torque[lbf·in]**||
|● for main contacts with screw-type terminals|18 ... 22 lbf·in|
|● for auxiliary and control contacts with screw-type
terminals|4.5 ... 5.3 lbf·in|
|**design of the thread of the connection screw**||
|● for main contacts|M4|
Subject to change without notice © Copyright Siemens
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||||||
|---|---|---|---|---|
|● of the auxiliary and control contacts|M3|
|stripped length of the cable|
|● for main contacts|10 mm|
|● for auxiliary and control contacts|7 mm|
|a|UL/CSA ratings|
|operational current according to UL 508 rated value|55 A|
|a|Ambient conditions|
|installation altitude at height above sea level maximum|1 000 m|
|ambient temperature|
|● during operation|-25 ... +60 °C|
|● during storage|-55 ... +80 °C|
|a|Electromagnetic compatibility|
|conducted interference|
|● due to burst according to IEC 61000-4-4|2 kV / 5 kHz, behavior criterion 2|
|● due to conductor-earth surge according to IEC 61000-4-5|2 kV, behavior criterion 2|
|● due to conductor-conductor surge according to IEC|1 kV, behavior criterion 2|
|61000-4-5|
|● due to high-frequency radiation according to IEC 61000-|140 dBuV in the frequency range 0.15 ... 80 MHz, behavior criterion 1|
|4-6|
|electrostatic discharge according to IEC 61000-4-2|4 kV contact discharging / 8 kV air discharging, behavior criterion 2|
|conducted HF interference emissions according to|Class A for industrial environment|
|CISPR11|
|re|
|field-bound HF interference emission according to CISPR11|Class A for industrial environment|
|Short-circuit protection, design of the fuse link|
|manufacturer's article number|
|● of full range R fuse link for semiconductor protection at|3NE1803-0; These fuses have a smaller rated current than the semiconductor|
|NH design usable|relays|
|● of back-up R fuse link for semiconductor protection at NH|3NE8018-1|
|design usable|
|● of back-up R fuse link for semiconductor protection at|3NC1450; These fuses have a smaller rated current than the semiconductor|
|cylindrical design 14 x 51 mm usable|relays|
|● of back-up R fuse link for semiconductor protection at|3NC2250; These fuses have a smaller rated current than the semiconductor|
|cylindrical design 22 x 58 mm usable|relays|
|manufacturer's article number of the gG fuse at NH design|
|usable|
|● up to 460 V|3NA3807-6; These fuses have a smaller rated current than the semiconductor|
|relays|
|● up to 600 V|3NA3805-6; These fuses have a smaller rated current than the semiconductor|
|relays|
|a|Approvals Certificates|
|Environment|General Product Approval|
|Environmental Con-|
|firmations|
|General Product Ap-|EMV|Test Certificates|other|
|proval|
|Type Test Certific-|Confirmation|Miscellaneous|Confirmation|
|UK|——_—|ates/Test Report|OO|ee|
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**other**
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## **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/ic10
**Industry Mall (Online ordering system)** https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3RF2255-3AB45 **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RF2255-3AB45 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RF2255-3AB45
**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RF2255-3AB45&lang=en
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**last modified:**
4/4/2026
Subject to change without notice © Copyright Siemens
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## Links
- [View this product on Novapart](https://novapart.co/products/3RF2255-3AB45/solid-state-relay-dpst-no-55-a-600-vac-panel-screw)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/3rf2255-3ab45/solid-state-relays/dp/3455125)
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