{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RF2190-1AA45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RF2190-1AA45","canonicalUrl":"https://aoctrl.com/siemens/3RF2190-1AA45","factsUrl":"https://aoctrl.com/api/mcp/products/3RF2190-1AA45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RF2190-1AA45 single-phase solid-state relay, 50 A AC-51, 600 V insulation, zero-point switching, screw-type terminals, 22.5 mm DIN rail.","salesMarkdown":"## Active SIRIUS relay, sized for AC-51 heating duty The 3RF2190-1AA45: It carries 50 A at AC-51 (resistive heating duty) and 50 A per UL 508, with a maximum ampacity figure of 90 A on the housing label — the AC-51 number, not the 90 A, is the rating that governs continuous heating-element switching. Per-pole dissipation is 118 W at full load, which drives the thermal budget for cabinet layout and forced-air decisions inside any enclosure it lands in. ## Operating window, insulation class, and switching behaviour ON-delay and OFF-delay are each 1 ms plus at most one additional half-wave — zero-point switching plus that half-wave floor is what keeps turn-on transients off the load on the first cycle after a control signal arrives. Reverse (off-state) current through the thyristor is 10 mA — relevant when the relay feeds a low-power load, because that leakage floor plus the 500 mA operational minimum defines the working envelope at the bottom end. ## Thermal envelope and the derating anchor at 40 °C Operating temperature spans -25... +60 °C, storage -55... +80 °C, with derating temperature anchored at 40 °C — past that point the published current curve steps down and cabinet-side cooling (or spacing) becomes mandatory to hold the 50 A AC-51 figure. Side-by-side mounting is permitted, which is useful in a multi-loop heater panel where the SSR rows stack tightly along the DIN rail — but the 40 °C derating anchor still applies to the bank as a whole, not just to the relay fitted alone. ## Footprint, wiring, and short-circuit coordination Body dimensions are 22.5 mm wide × 48 mm deep × 85 mm tall, screw-fixed onto the mounting surface — a slim 22.5 mm footprint that lets multi-loop panels stack tightly along a DIN rail. Short-circuit coordination is documented against the 3NA6812 NH fuse and the 5SE2335 NEOZED fuse — both are sized below the relay's continuous current so they clear the 6 600 A²·s I²t let-through before the output stage is damaged. ## Compliance anchor and panel-side integration With 600 V insulation, a 50 A AC-51 rating, and a 22.5 mm DIN-rail-ready footprint, the 3RF2190-1AA45 drops into a heater or soft-load panel without re-engineering the surrounding wiring — the control-side 30 V DC / 13 mA draw interfaces directly with a PLC output card or a low-voltage driver.","metaTitle":"Siemens 3RF2190-1AA45 SIRIUS solid-state relay, 50 A, 600 V","metaDescription":"Siemens 3RF2190-1AA45 SIRIUS single-phase solid-state relay, 50 A AC-51, 600 V insulation, zero-point switching, screw terminals.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Solid State Relays"],"specifications":{"Depth":"48 mm","Solid":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","Width":"22.5 mm","at DC":"13 mA","title":"3RF2190-1AA45","Height":"85 mm","Per Pole":"118 W","at 50 Hz":"40 ... 660 V","at 60 Hz":"40 ... 660 V","description":"Semiconductor relay, 1-phase 3RF2 Overall width 22.5 mm, 90 A 48-600 V / 4-30 V DC screw terminal Blocking voltage 1200 V","ON-delay time":"1 ms; additionally max. one half-wave","During Storage":"-55 ... +80 °C","OFF-delay time":"1 ms; additionally max. one half-wave","lifecycle_stage":"current","Ampacity Maximum":"90 A","During Operation":"-25 ... +60 °C","Fastening Method":"screw fixing","Product Function":"zero-point switching","For Main Contacts":"7 mm","I2t value maximum":"6 600 A²·s","Solid Or Stranded":"1.5 ... 6 mm²","at DC rated value":"30 V","Product Brand Name":"SIRIUS","Product Designation":"solid-state relay","at NH design usable":"3NA6812; These fuses have a smaller rated current than the semiconductor relays","Derating Temperature":"40 °C","at 50 Hz rated value":"48 ... 600 V","at 60 Hz rated value":"48 ... 600 V","at AC-51 rated value":"50 A","Design Of The Product":"single-phase","Side-By-Side Mounting":"Yes","of NEOZED fuse usable":"5SE2335; These fuses have a smaller rated current than the semiconductor relays","For Main Current Circuit":"screw-type terminals","acc. to UL 508 rated value":"50 A","power loss [V∙A] maximum":"118 V·A","Operational Current Minimum":"500 mA","Substance Prohibitance (Date)":"28.05.2009","Insulation Voltage Rated Value":"600 V","Operating Frequency Rated Value":"50 ... 60 Hz","at AWG cables for main contacts":"2x (14 ... 10)","Reverse Current Of The Thyristor":"10 mA","For Auxiliary And Control Circuit":"screw-type terminals","control current at DC rated value":"15 mA","For Auxiliary And Control Contacts":"7 mm","due to burst acc. to IEC 61000-4-4":"2 kV / 5 kHz behavior criterion 2","reference code acc. to IEC 81346-2":"Q","Surge Current Resistance Rated Value":"1 150 A","Of The Auxiliary And Control Contacts":"M3","At Cylindrical Design 22 X 58 Mm Usable":"3NW6212-1; These fuses have a smaller rated current than the semiconductor relays","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"1","shock resistance acc. to IEC 60068-2-27":"15g / 11 ms","1 Of The Accessories That Can Be Ordered":"terminal cover","2 Of The Accessories That Can Be Ordered":"power regulator","3 Of The Accessories That Can Be Ordered":"converter","4 Of The Accessories That Can Be Ordered":"load monitoring","5 Of The Accessories That Can Be Ordered":"load monitoring, basis","Finely Stranded With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","Number Of Poles For Main Current Circuit":"1","Tightening Torque Of Fixing Screw Maximum":"1.5 N·m","vibration resistance acc. to IEC 60068-2-6":"2g","Finely Stranded Without Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","For Main Contacts With Screw-Type Terminals":"7 ... 10.3 lbf·in","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","Type Of Voltage Of The Control Supply Voltage":"DC","electrostatic discharge acc. to IEC 61000-4-2":"4 kV contact discharging / 8 kV air discharging, behavior criterion 2","field-based interference acc. to IEC 61000-4-3":"80 MHz ... 1 GHz 10 V/m, behavior criterion 1","touch protection on the front acc. to IEC 60529":"finger-safe, for vertical contact from the front","at AWG cables for auxiliary and control contacts":"1x (AWG 20 ... 12)","at DC full-scale value for signal<0> recognition":"1 V","due to conductor-earth surge acc. to IEC 61000-4-5":"2 kV behavior criterion 2","protection class IP on the front acc. to IEC 60529":"IP20","Tightening Torque [Lbf·In] Of Fixing Screw Maximum":"13 lbf·in","conducted HF interference emissions acc. to CISPR11":"Class A for industrial environment","Surge Voltage Resistance Of Main Circuit Rated Value":"6 kV","field-bound HF interference emission acc. to CISPR11":"Class B for the domestic, business and commercial environments","Installation Altitude At Height Above Sea Level Maximum":"1 000 m","Relative Symmetrical Tolerance Of The Operating Frequency":"10 %","For Auxiliary And Control Contacts With Screw-Type Terminals":"4.5 ... 5.3 lbf·in","Blocking Voltage At The Thyristor For Main Contacts Maximum Permissible":"1 200 V","of back-up R fuse link for semiconductor protection at NH design usable":"3NE8021-1","AWG number as coded connectable conductor cross section for main contacts":"14 ... 10","of full range R fuse link for semiconductor protection at NH design usable":"3NE1021-2","power loss [W] for rated value of the current at AC in hot operating state":"118 W","Rate Of Voltage Rise At The Thyristor For Main Contacts Maximum Permissible":"1 000 V/µs","power loss [W] for rated value of the current without load current share typical":"0.5 W","of back-up R fuse link for semiconductor protection at cylindrical design 22 x 58 mm usable":"3NC2280; These fuses have a smaller rated current than the semiconductor relays"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$40.64 – $121.41","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/98ed85b1a84a9c09b372826cbd19ab48.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=117827&mlfb=3RF2190-1AA45"},"ai":{"faq":[{"question":"Where can I buy 3RF2190-1AA45 and how do I get a price?","answer":"No per-unit price is published on this page."},{"question":"What are the key electrical ratings of 3RF2190-1AA45?","answer":"50 A at AC-51 (resistive heating duty), 50 A per UL 508, 90 A maximum ampacity on the label, 48... 600 V operating range at 50/60 Hz, 600 V insulation rating, zero-point switching with 1 ms ON/OFF delay plus at most one half-wave, and 118 W per-pole dissipation at full load. The AC-51 figure — not the 90 A maximum — is the number that governs continuous heating-element service."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RF2190-1AA45","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RF2190-1AA45 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}