# Solid State Relay, SPST-NO, 50 A, 230 VAC, Panel, Screw, Zero Crossing

![Product image](https://novapart.co/image/farnell:3455006/)

**URL**: https://novapart.co/products/3RF2050-4AA02/solid-state-relay-spst-no-50-a-230-vac-panel-screw
**SKU**: 3RF2050-4AA02
**Manufacturer**: SIEMENS
**Price**: €59.5400
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Product Range | SIRIUS 3RF20 Series |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3455006/)

**3RF2050-4AA02** 

**Data sheet** 

***phase-out type*** semiconductor relay, 1-phase 3RF2 width 45 mm, 50 A 24230 V / 24 V DC screw terminal spring-loaded control connector for mounting on available cooling surfaces 

|nny<br>eo...@~~a~~|***phase-out type*** semiconductor relay, 1-phase 3RF2 width 45 mm, 50 A 24-<br>230 V / 24 V DC screw terminal spring-loaded control connector for mounting on<br>available cooling surfaces<br>~~a~~|
|---|---|
|**product brand name**|SIRIUS|
|**product designation**|solid-state relay|
|**design of theproduct**|1-pole|
|**product type designation**|3RF20|
|**General technical data**<br>~~a~~||
|**product function**<br>~~a~~|zero-point switching<br>~~a~~|
|**power loss[W] for rated value of the current**||
|● at AC in hot operatingstate|66 W|
|● at AC in hot operatingstateperpole|66 W|
|● without load current share typical|0.4 W|
|**insulation voltage rated value**|600 V|
|**protection class IP**|IP20|
|**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)**|05/28/2009|
|**SVHC substance name**|Lead monoxide (lead oxide) CAS-No. 1317-36-8<br>2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one CAS-No. 71868-<br>10-5<br>Melamine CAS-No. 108-78-1|
|**Net Weight**|0.086 kg|
|**Main circuit**<br>~~a~~||
|**number ofpoles for main current circuit**<br>~~a~~|1<br>~~a~~|
|**number of NO contacts for main contacts**|1|
|**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|24 ... 230 V|
|— at 60 Hz rated value|24 ... 230 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**||
|● at 50 Hz|20 ... 253 V|
|● at 60 Hz|20 ... 253 V|
|**operational current rated value maximum**|50 A|
|**operational current**||
|● at AC-1 at 400 V rated value|50 A|
|● at AC-51 rated value|50 A|
|● according to UL 508 rated value|50 A|



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|**ampacity maximum**|50 A|
|---|---|
|**operational current minimum**|500 mA|
|**rate of voltage rise at the thyristor for main contacts**<br>**maximumpermissible**|1 000 V/µs|
|**blocking voltage at the thyristor for main contacts**<br>**maximumpermissible**|800 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 rated value maximum**<br>**permissible**|30 V|
|**control supply voltage 1 at DC**|15 ... 24 V|
|**control supply voltage at DC**||
|● initial value for signal <1> detection|15 V|
|● full-scale value for signal<0> recognition|5 V|
|**control current at minimum control supply voltage**||
|● at DC|13 mA|
|control current at DC rated value|15 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**<br>**equipment**|M4|
|**tightening torque of fixing screw maximum**|1.5 N·m|
|**tightening torque[lbf·in] of fixing screw maximum**|13 lbf·in|
|**height**|58 mm|
|**width**|45 mm|
|**depth**|48 mm|
|**Connections/ Terminals**||
|**product component removable terminal for auxiliary and**<br>**control circuit**|Yes|
|**type of electrical connection**||
|● for main current circuit|screw-type terminals|
|● for auxiliaryand control circuit|spring-loaded terminals|
|**type of connectable conductor cross-sections**||
|● for main contacts||
|— solid|2x(1.5 ... 2.5 mm²), 2x(2.5 ... 6 mm²)|
|— finelystranded with core endprocessing|2x(1 ... 2.5 mm²), 2x(2.5 ... 6 mm²), 1x 10 mm²|
|● for AWG cables for main contacts|2x(14 ... 10)|
|**connectable conductor cross-section for main contacts**||
|● solid or stranded|1.5 ... 6 mm²|
|● finelystranded with core endprocessing|1 ... 10 mm²|
|**type of connectable conductor cross-sections**||
|● for auxiliaryand control contacts||
|— solid|1x(0.5 ... 2.5 mm²)|
|— finelystranded with core endprocessing|1x(0.5 ... 2.5 mm²)|
|— finelystranded without core endprocessing|1x(0.5 ... 2.5 mm²)|
|● for AWG cables for auxiliaryand control contacts|1x(20 ... 12)|
|**AWG number as coded connectable conductor cross**<br>**section for main contacts**|14 ... 10|
|**tightening torque**||
|● for main contacts with screw-type terminals|2 ... 2.5 N·m|
|**tightening torque[lbf·in]**||
|● for main contacts with screw-type terminals|7 ... 10.3 lbf·in|
|● for auxiliary and control contacts with screw-type<br>terminals|4.5 ... 5.3 lbf·in|



Subject to change without notice © Copyright Siemens 

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|**design of the thread of the connection screw**|**design of the thread of the connection screw**||
|---|---|---|
|● for main contacts||M4|
|● of the auxiliaryand control contacts||M4|
|**stripped length of the cable**|||
|● for main contacts||10 mm|
|● for auxiliaryand control contacts||10 mm|
|**UL/CSA ratings**<br>~~a~~|||
|**operational current according to UL 508 rated value**<br>~~a~~||50 A<br>~~a~~|
|**Ambient conditions**<br>~~a~~|||
|installation altitude at height above sea level maximum<br>~~a~~||1 000 m<br>~~a~~|
|**ambient temperature**|||
|● duringoperation||-25 ... +60 °C|
|● duringstorage||-55 ... +80 °C|
|**Electromagnetic compatibility**<br>~~ee~~|||
|**conducted interference**<br>~~ee~~||~~ee~~|
|● due to burst accordingto IEC 61000-4-4||2 kV / 5 kHz, behavior criterion 2|
|● due to conductor-earth surge accordingto IEC 61000-4-5||2 kV, behavior criterion 2|
|● due to conductor-conductor surge according to IEC<br>61000-4-5||1 kV, behavior criterion 2|
|● due to high-frequency radiation according to IEC 61000-<br>4-6||140 dBuV in the frequency range 0.15 ... 80 MHz, behavior criterion 1|
|**field-based interference according to IEC 61000-4-3**||80 MHz ... 1 GHz 10 V/m, behavior criterion 1|
|**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**<br>**CISPR11**<br>~~ee~~||Class A for industrial environment<br>~~ee~~|
|**field-bound HF interference emission according to CISPR11**<br>~~ee~~||Class B for the domestic, business and commercial environments<br>~~ee~~|
|**Short-circuit protection, design of the fuse link**|||
|manufacturer's article number|||
|● of gS fuse for semiconductor protection at NH design<br>usable||3NE1817-0|
|● of full range R fuse link for semiconductor protection at<br>cylindrical design usable||5SE1350|
|● of back-up R fuse link for semiconductor protection at NH<br>design usable||3NE8017-1|
|● of back-up R fuse link for semiconductor protection at<br>cylindrical design 14 x 51 mm usable||3NC1450|
|● of back-up R fuse link for semiconductor protection at<br>cylindrical design 22 x 58 mm usable||3NC2263|
|manufacturer's article number of thegG fuse|||
|● at NH design usable||3NA6810; These fuses have a smaller rated current than the semiconductor<br>relays|
|● at NH design usable note||These fuses have a smaller rated current than the semiconductor relays|
|● at cylindrical design 14 x 51 mm usable||3NW6107-1; These fuses have a smaller rated current than the semiconductor<br>relays|
|● at cylindrical design 14 x 51 mm usable note||These fuses have a smaller rated current than the semiconductor relays|
|● at cylindrical design 22 x 58 mm usable||3NW6207-1; These fuses have a smaller rated current than the semiconductor<br>relays|
|● at cylindrical design 22 x 58 mm usable note||These fuses have a smaller rated current than the semiconductor relays|
|manufacturer's article number|||
|● of DIAZED fuse usable||5SB2711; These fuses have a smaller rated current than the semiconductor<br>relays|
|● of DIAZED fuse usable note||These fuses have a smaller rated current than the semiconductor relays|
|● of NEOZED fuse usable<br>~~ee~~||5SE2320; These fuses have a smaller rated current than the semiconductor<br>relays<br>~~ee~~|
|**Approvals Certificates**<br>~~ee~~|||
|**Environment**<br>~~ee~~|**General Product Approval**<br>~~ee~~||



Subject to change without notice © Copyright Siemens 

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**EMV** 

**Test Certificates other** Type Test CertificConfirmation Confirmation ates/Test Report ~~—_— ——~~ 

~~a~~ **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=3RF2050-4AA02 **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RF2050-4AA02 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RF2050-4AA02 

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**last modified:** 4/4/2026 

Subject to change without notice © Copyright Siemens 

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