{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RF2440-1AC45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RF2440-1AC45","canonicalUrl":"https://aoctrl.com/siemens/3RF2440-1AC45","factsUrl":"https://aoctrl.com/api/mcp/products/3RF2440-1AC45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state contactor, 3RF2440-1AC45, three-phase controlled, zero-point switching, 40 A AC-51 rated value, screw fixing.","salesMarkdown":"The Siemens 3RF2440-1AC45 is a SIRIUS solid-state contactor designed for three-phase controlled switching with zero-point switching, rated at 40 A in AC-51 duty. This means it is sized for resistive or slightly inductive loads — typical for heating elements in furnaces or ovens where zero-point switching reduces inrush and RFI by turning on at the voltage zero crossing. The AC-51 rated value of 40 A defines the continuous resistive load the contactor can handle. For motor loads, derating applies — the part carries a minimum operational current of 500 mA, so it will not drop out on lightly loaded circuits. The I²t maximum of 6,600 A²·s governs short-circuit withstand; the evidence recommends 3NA3812 fuses with a smaller rated current than the semiconductor relay for protection. Control current draw is 30 mA at the DC rated value of 30 V, with an ON-delay of 1 ms plus a maximum of one half-wave. This fast switching suits applications needing precise timing, such as thermal profiling in glass or ceramic furnaces where ramp and soak, repeatably, depend on consistent turn-on delay. Mounts via screw fixing — not a snap-on DIN rail clip — so factor in panel drilling and hardware. Side-by-side mounting is permitted, which helps density in multi-contactor heater banks. The operating temperature range of -25 to +60 °C and storage range of -55 to +80 °C cover most cabinet environments, but derating begins at 40 °C, so forced ventilation or current reduction is needed above that threshold.","metaTitle":"Siemens 3RF2440-1AC45 SIRIUS solid-state contactor, 40 A AC-","metaDescription":"Siemens SIRIUS 3RF2440-1AC45 solid-state contactor, 40 A AC-51, zero-point switching, three-phase controlled. Current lifecycle stage. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Solid State Relays"],"specifications":{"Depth":"130 mm","Solid":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","Width":"119.5 mm","at DC":"22 mA","title":"3RF2440-1AC45","Height":"95 mm","at 50 Hz":"40 ... 660 V","at 60 Hz":"40 ... 660 V","description":"Solid-state contactor 3-phase 3RF2 AC 51 / 40 A / 40 °C 48-600 V / 4-30 V DC 3-phase controlled screw terminal Blocking voltage 1200 V","up to 460 V":"3NA3812; These fuses have a smaller rated current than the semiconductor relays","ON-delay time":"1 ms; additionally max. one half-wave","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","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","Degree Of Pollution":"3","Product Designation":"solid-state contactor","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":"40 A","Design Of The Product":"three-phase controlled","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Operational Current Minimum":"500 mA","at AC in hot operating state":"121 W","Substance Prohibitance (Date)":"07/01/2006","Insulation Voltage Rated Value":"600 V","Operating Frequency Rated Value":"50 ... 60 Hz","according to UL 508 rated value":"30 A","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":"30 mA","For Auxiliary And Control Contacts":"7 mm","Without Load Current Share Typical":"0.9 W","at AC-51 according to IEC 60947-4-3":"30 A","Surge Current Resistance Rated Value":"1 150 A","Symmetrical Line Frequency Tolerance":"5 Hz","Of The Auxiliary And Control Contacts":"M3","at AC in hot operating state per pole":"40.33 W","reference code according to EN 61346-2":"Q","due to burst according to IEC 61000-4-4":"2 kV / 5 kHz behavior criterion 2","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","2 Of The Accessories That Can Be Ordered":"converter","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":"3","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":"18 ... 22 lbf·in","at DC initial value for signal <1> detection":"4 V","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"15g / 11 ms","Type Of Voltage Of The Control Supply Voltage":"DC","vibration resistance according to IEC 60068-2-6":"2g","at AWG cables for auxiliary and control contacts":"1x (AWG 20 ... 12)","at DC full-scale value for signal<0> recognition":"1 V","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharging / 8 kV air discharging, behavior criterion 2","Surge Voltage Resistance Of Main Circuit Rated Value":"6 kV","Installation Altitude At Height Above Sea Level Maximum":"1 000 m","conducted HF interference emissions according to CISPR11":"Class A for industrial environment","Relative Symmetrical Tolerance Of The Operating Frequency":"10 %","field-bound HF interference emission according to CISPR11":"Class A for industrial environment","Design Of The Thread Of The Screw For Securing The Equipment":"M4","For Auxiliary And Control Contacts With Screw-Type Terminals":"7.5 ... 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":"3NE8017-1","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":"3NE1802-0","Rate Of Voltage Rise At The Thyristor For Main Contacts Maximum Permissible":"1 000 V/µs","of full range R fuse link for semiconductor protection at cylindrical design usable":"5SE1350; Maximum operating voltage 400 V!","of back-up R fuse link for semiconductor protection at cylindrical design 14 x 51 mm usable":"3NC1450","of back-up R fuse link for semiconductor protection at cylindrical design 22 x 58 mm usable":"3NC2280"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$664.44","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c86951ba258481c534a7a95091051ed1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=264746&mlfb=3RF2440-1AC45"},"ai":{"faq":[{"question":"What are the key electrical ratings for this solid-state contactor?","answer":"The AC-51 rated value is 40 A, the insulation voltage is 600 V, and the operating frequency is 50 to 60 Hz. The I²t maximum is 6,600 A²·s, and the minimum operational current is 500 mA."},{"question":"What compliance documentation is available for this part?","answer":"The evidence records a substance prohibitance date of July 2006, indicating RoHS compliance. The part carries an insulation voltage rating of 600 V and pollution degree 3, consistent with industrial control equipment standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RF2440-1AC45","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/3RF2440-1AC45 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}}