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3RF2255-2AB45
Solid State Relay, DPST-NO, 55 A, 600 VAC, DIN Rail, Spring, Zero Crossing
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: SIEMENS
- Product type:
- Product Range: SIRIUS 3RF22 Series
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 176.2 € |
| Current stock | 10+ |
| Lead time | 30 days |
**3RF2255-2AB45** **Data sheet** ***phase-out type*** semiconductor relay, 3-phase 3RF2 55 A / 40 °C 48-600 V / 4- 30 V DC 2-phase controlled spring-loaded terminal blocking voltage 1200 V for mounting on available cooling surfaces |80° 0“os<br>BERR<br>un<br>tie<br>= = bh<br>varies“ee|***phase-out type*** semiconductor relay, 3-phase 3RF2 55 A / 40 °C 48-600 V / 4-<br>30 V DC 2-phase controlled spring-loaded terminal blocking voltage 1200 V for<br>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**<br>~~ee~~|| |**product function**<br>~~ee~~|zero-point switching<br>~~ee~~| |**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**|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)**|07/01/2006| |**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**|0.135 kg| |**Main circuit**<br>~~ee~~|| |**number ofpoles for main current circuit**<br>~~ee~~|3<br>~~ee~~| |**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**|| |● at 50 Hz|40 ... 660 V| Subject to change without notice © Copyright Siemens 3RF22552AB45 Page 1/5 5/29/2026 |● 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|20 A| |● accordingto UL 508 rated value|20 A| |**ampacity maximum**|55 A| |**operational current minimum**|500 mA| |**rate of voltage rise at the thyristor for main contacts**<br>**maximumpermissible**|100 V/µs| |**blocking voltage at the thyristor for main contacts**<br>**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**<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**|95 mm| |**width**|45 mm| |**depth**|47 mm| |**Connections/ Terminals**|| |**product component removable terminal for auxiliary and**<br>**control circuit**|Yes| |**type of electrical connection**|| |● for main current circuit|spring-loaded terminals| |● for auxiliaryand control circuit|spring-loaded terminals| |**type of connectable conductor cross-sections**|| |● for main contacts|| |— solid|2x(0.5 ... 2.5 mm²)| |— finelystranded with core endprocessing|2x(0.5 ... 1.5 mm²)| |— finelystranded without core endprocessing|2x(0.5 ... 2.5 mm²)| |● for AWG cables for main contacts|2x(18 ... 14)| |**connectable conductor cross-section for main contacts**|| |● solid or stranded|0.5 ... 2.5 mm²| |● finelystranded with core endprocessing|0.5 ... 1.5 mm²| |● finelystranded without core endprocessing|0.5 ... 2.5 mm²| |**type of connectable conductor cross-sections**|| |● for auxiliaryand control contacts|| |— solid|0.5 ... 1.5 mm²| |— finelystranded with core endprocessing|0.5 ... 2.5 mm²| |— finelystranded without core endprocessing|0.5 ... 2.5 mm²| |● for AWG cables for auxiliaryand control contacts|1x(20 ... 12)| |**AWG number as coded connectable conductor cross**|10 ... 14| Subject to change without notice © Copyright Siemens 3RF22552AB45 Page 2/5 5/29/2026 |**section for main contacts**|**section for main contacts**|| |---|---|---| |**tightening torque**||| |● for main contacts with screw-type terminals||2 ... 2.5 N·m| |**design of the thread of the connection screw**||| |● for main 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~~<br>~~a~~||20 A<br>~~a~~<br>~~a~~| |Electrical Safety<br>~~a~~||| |**touch protection on the front according to IEC 60529**<br>~~a~~||finger-safe, for vertical contact from the front<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>~~a~~||| |**conducted interference**<br>~~a~~||~~a~~| |● 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| |**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**||Class A for industrial environment| |**field-bound HF interference emission according to CISPR11**<br>~~re~~||Class A for industrial environment<br>~~re~~| |**Short-circuit protection, design of the fuse link**||| |manufacturer's article number||| |● of full range R fuse link for semiconductor protection at<br>NH design usable||3NE1803-0; These fuses have a smaller rated current than the semiconductor<br>relays| |● of back-up R fuse link for semiconductor protection at NH<br>design usable||3NE8018-1| |● of back-up R fuse link for semiconductor protection at<br>cylindrical design 14 x 51 mm usable||3NC1450; These fuses have a smaller rated current than the semiconductor<br>relays| |● of back-up R fuse link for semiconductor protection at<br>cylindrical design 22 x 58 mm usable||3NC2250; These fuses have a smaller rated current than the semiconductor<br>relays| |manufacturer's article number of the gG fuse at NH design<br>usable||| |● up to 460 V||3NA3807-6; These fuses have a smaller rated current than the semiconductor<br>relays| |● up to 600 V<br>~~a~~||3NA3805-6; These fuses have a smaller rated current than the semiconductor<br>relays<br>~~a~~| |**Approvals Certificates**<br>~~a~~||| |**Environment**<br>~~a~~|**General Product Approval**<br>~~a~~|| **other** Subject to change without notice © Copyright Siemens 3RF22552AB45 Page 3/5 5/29/2026 ~~sii~~ **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=3RF2255-2AB45 **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RF2255-2AB45 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RF2255-2AB45 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RF2255-2AB45&lang=en Subject to change without notice © Copyright Siemens 3RF22552AB45 Page 4/5 5/29/2026 **==> picture [438 x 469] intentionally omitted <==** **----- Start of picture text -----**<br> -Q<br>| a a [a] GS A [a] a aa BGa a a a aaCSS|GG |O "| d 160 SSRee, ——————SS— a aS EE ES S ee T__<br>aaaa aa aaaa Aaa aaaAa A | aaa aa eea O /|| 140 ___esaaa SEE aa a a a aeS Rthha0,15K/W<br>aaaa Aaa aBOaGGa |a aeG ee GGa | 120 a aa aaaa Ssa sO 0,18K/W0,25K/W<br>aaa aa a a a Oe 100 aa aa aA a seSO a 0,35K/W<br>aaa A a A aa aa a aGOa ee|| 80 a—a SSOea a 0,43K/W0,55K/W<br>a Aa aaa a a Goa | a a a<br>a a a a ee ee a a 0,75K/W<br>a a aaaceceaSG a aaaaa aaaa acsaaaaaa a| a aaaeaaa aaaaGea eeeeaaa eeaaa eeeeeeeeee eeeeee| 604020 rea|ee|aeeaeSaeeaa| Osa a|eerersa| 1,15K/W1,8K/W2,8K/W4K/W5K/W7K/W<br>SA A A CS SS ( 0 a CSa C SC<br>5 15 25 35 45 55 0 10 20 30 40 50 60<br>Device curren t / Gerätestrom I e (A) — Ambien t tempe rature/ Umgebung stempe ratur T a (°C)<br>+ -<br>1/L1 3/L2 5/L3 A1 A2<br>1 2 3<br>T T T<br>2/ 4/ 6/<br>(A)<br> (W) M I e<br>P<br> (W)<br> M<br>P<br>/ Modulverlustleistung<br>loss<br>power<br>Module<br>**----- End of picture text -----**<br> **last modified:** 4/4/2026 Subject to change without notice © Copyright Siemens 3RF22552AB45 Page 5/5 5/29/2026
Updated at June 10, 2026
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