# Solid State Relay, SPST-NO, 20 A, 230 VAC, Panel, Screw, Zero Crossing
**URL**: https://novapart.co/products/3RF2020-1AA22/solid-state-relay-spst-no-20-a-230-vac-panel-screw
**SKU**: 3RF2020-1AA22
**Manufacturer**: SIEMENS
**Price**: €55.3700
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Product Range | SIRIUS 3RF20 Series |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3454983/)
**3RF2020-1AA22**
**Data sheet**
***phase-out type*** semiconductor relay, 1-phase 3RF2 width 45 mm, 20 A 24230 V / 110-230 V AC screw terminal for mounting on available cooling surfaces
|Ra i
ca
‘6...@
oo|***phase-out type*** semiconductor relay, 1-phase 3RF2 width 45 mm, 20 A 24-
230 V / 110-230 V AC screw terminal for mounting on available cooling surfaces|
|---|---|
|**product brand name**|SIRIUS|
|**product designation**|solid-state relay|
|**design of theproduct**|1-pole|
|**product type designation**|3RF20|
|**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|28.6 W|
|● at AC in hot operatingstateperpole|28.6 W|
|● without load current share typical|3.5 W|
|**insulation voltage rated value**|600 V|
|**protection class IP**|IP20|
|protection class IP on the front accordingto IEC 60529|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 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**|0.085g|
|**Main circuit**
~~a~~||
|**number ofpoles for main current circuit**
~~a~~|1
~~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**|20 A|
|**operational current**||
|● at AC-1 at 400 V rated value|20 A|
Subject to change without notice © Copyright Siemens
3RF20201AA22 Page 1/5
5/31/2026
|● at AC-51 rated value|20 A|
|---|---|
|● accordingto UL 508 rated value|20 A|
|**ampacity maximum**|20 A|
|**operational current minimum**|100 mA|
|**rate of voltage rise at the thyristor for main contacts**
**maximumpermissible**|500 V/µs|
|**blocking voltage at the thyristor for main contacts**
**maximumpermissible**|800 V|
|**reverse current of the thyristor**|10 mA|
|**derating temperature**|40 °C|
|**surge current resistance rated value**|200 A|
|**I2t value maximum**|200 A²·s|
|**Control circuit/ Control**||
|**type of voltage of the control supply voltage**|AC|
|**control supply voltage 1 at AC**||
|● at 50 Hz|110 ... 230 V|
|● at 60 Hz|110 ... 230 V|
|**control supply voltage at AC**||
|● at 50 Hz full-scale value for signal<0> recognition|40 V|
|● at 60 Hz full-scale value for signal<0> recognition|40 V|
|● initial value for signal <1> detection|90 V|
|**control supply voltage frequency**||
|**● 1 rated value**|50 Hz|
|**● 2 rated value**|60 Hz|
|**symmetrical line frequency tolerance**|5 Hz|
|**control current at minimum control supply voltage**||
|● at AC|2 mA|
|control current at AC rated value|15 mA|
|**ON-delay time**|40 ms; additionallymax. one half-wave|
|**OFF-delay time**|40 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**|58 mm|
|**width**|45 mm|
|**depth**|48 mm|
|**Connections/ Terminals**||
|**product component removable terminal for auxiliary and**
**control circuit**|Yes|
|**type of electrical connection**||
|● for main current circuit|screw-type terminals|
|● for auxiliaryand control circuit|screw-type 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), 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 auxiliary and control contacts|1x (20 ... 12)|
Subject to change without notice © Copyright Siemens
3RF20201AA22 Page 2/5
5/31/2026
|**AWG number as coded connectable conductor cross**
**section for main contacts**|14 ... 10|
|---|---|
|**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|7 ... 10.3 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|
|● of the auxiliaryand control contacts|M3|
|**stripped length of the cable**||
|● for main contacts|10 mm|
|● for auxiliaryand control contacts|7 mm|
|**UL/CSA ratings**||
|**operational current according to UL 508 rated value**|20 A|
|Electrical Safety||
|**touch protection on the front according to IEC 60529**|finger-safe, for vertical contact from the front|
|**Ambient conditions**||
|installation altitude at height above sea level maximum|1 000 m|
|**ambient temperature**||
|● duringoperation|-25 ... +60 °C|
|● duringstorage|-55 ... +80 °C|
|**Electromagnetic compatibility**||
|**conducted interference**||
|● 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
61000-4-5|1 kV, behavior criterion 2|
|● due to high-frequency radiation according to IEC 61000-
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**
**CISPR11**|Class A for industrial environment|
|**field-bound HF interference emission according to CISPR11**|Class B for the domestic, business and commercial environments|
|**Short-circuit protection, design of the fuse link**||
|manufacturer's article number||
|● of gS fuse for semiconductor protection at NH design
usable|3NE1814-0|
|● of full range R fuse link for semiconductor protection at
cylindrical design usable|5SE1325|
|● of back-up R fuse link for semiconductor protection at NH
design usable|3NE8015-1|
|● of back-up R fuse link for semiconductor protection at
cylindrical design 10 x 38 mm usable|3NC1032|
|● of back-up R fuse link for semiconductor protection at
cylindrical design 14 x 51 mm usable|3NC1430|
|● of back-up R fuse link for semiconductor protection at
cylindrical design 22 x 58 mm usable|3NC2225|
|manufacturer's article number of thegG fuse||
|● at NH design usable|3NA6803; These fuses have a smaller rated current than the semiconductor
relays|
|● at NH design usable note|These fuses have a smaller rated current than the semiconductor relays|
|● at cylindrical design 10 x 38 mm usable|3NW6001-1; These fuses have a smaller rated current than the semiconductor
relays|
|● at cylindrical design 10 x 38 mm usable note|These fuses have a smaller rated current than the semiconductor relays|
|● at cylindrical design 14 x 51 mm usable|3NW6101-1; These fuses have a smaller rated current than the semiconductor
relays|
|● at cylindrical design 14 x 51 mm usable note|These fuses have a smaller rated current than the semiconductor relays|
|manufacturer's article number||
Subject to change without notice © Copyright Siemens
3RF20201AA22 Page 3/5
5/31/2026
● of NEOZED fuse usable
● of NEOZED fuse usable 5SE2306; These fuses have a smaller rated current than the semiconductor relays ~~ee~~ **Approvals Certificates Environment General Product Approval** Environmental Confirmations ~~—~~ se WW fA Ce eX **EMV Test Certificates other** Type Test CertificConfirmation Confirmation ates/Test Report ~~Bo e~~ **Further information** ~~e~~ **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=3RF2020-1AA22 **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RF2020-1AA22 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RF2020-1AA22
**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RF2020-1AA22&lang=en
Subject to change without notice © Copyright Siemens
3RF20201AA22 Page 4/5
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## Links
- [View this product on Novapart](https://novapart.co/products/3RF2020-1AA22/solid-state-relay-spst-no-20-a-230-vac-panel-screw)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/3rf2020-1aa22/solid-state-relays/dp/3454983)
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