{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RF2320-1AA04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RF2320-1AA04","canonicalUrl":"https://aoctrl.com/siemens/3RF2320-1AA04","factsUrl":"https://aoctrl.com/api/mcp/products/3RF2320-1AA04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RF2320-1AA04, single-phase solid-state contactor, 20 A AC-51, 48 to 460 V at 50/60 Hz, zero-point switching, DIN-rail mount.","salesMarkdown":"## What the SIRIUS 3RF2320-1AA04 is, and where it lands in a panel The Siemens SIRIUS 3RF2320-1AA04 is a single-phase solid-state contactor with a 20 A AC-51 rating and a 48 to 460 V operating range at 50/60 Hz, designed for zero-point switching of resistive and slightly inductive loads in control panels. It lives in the 22.5 mm SIRIUS housing family — 120 mm deep, 95 mm tall — and snaps onto a standard 35 mm mounting rail per IEC 60715, with side-by-side mounting allowed so the bin can stack multiple units on the same rail without derating between neighbours. ## 20 A AC-51 continuous, 17.6 A per UL 508 The headline current rating is 20 A in AC-51 duty (resistive or weakly inductive), which is the figure that should govern heater banks and similar steady loads; under UL 508 the same device is listed at 17.6 A, and that lower figure is the binding number for any panel being built to a North American inspection path. Dissipation in the hot operating state runs to 20 W at AC full load, and the unit is derated from 40 °C ambient upward — meaning inside a sealed cabinet above that threshold the continuous current must be reduced against the manufacturer's derating curve rather than run flat to the nameplate. Zero-point switching means the thyristor fires at the AC voltage zero-cross rather than at a random phase angle — keeping the inrush transient low on lamp and heater loads and reducing electrical noise on the supply. The trade-off is the 10 mA off-state leakage typical of inverse-parallel thyristors, which matters where a downstream earth-leakage trip is sensitive. ## Control-side draw and minimum load The control input draws 13 mA at the 30 V DC rated voltage — light enough that a standard PLC transistor output can switch several of these contactors in parallel off one output card, provided the card's per-point current budget covers it. Turn-on and turn-off delay each sit at 1 ms plus a maximum of one additional half-wave, so the contactor tracks the control signal close enough for heater control loops but is not the right pick for phase-angle timing or fast-pulse applications. A 500 mA minimum operational current is required for reliable thyristor commutation — below that threshold the device should not be specified. ## Wiring, fusing and the bin-side realities Specified back-up fuses are DIAZED 5SB2711, NEOZED 5SE2320, or NH 3NA6807 depending on the cabinet standard. I²t maximum is 1 800 A²·s, which is the figure to cross-check against the chosen semiconductor fuse let-through to confirm coordination; pollution degree 3 is rated, so the contactor is built for typical industrial atmospheres without extra enclosure sealing beyond the cabinet itself.","metaTitle":"Siemens 3RF2320-1AA04 SIRIUS solid-state contactor, 20 A","metaDescription":"Siemens 3RF2320-1AA04 SIRIUS single-phase solid-state contactor, 20 A AC-51, 48 to 460 V. Zero-point switching, DIN-rail mount. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Solid State Relays"],"specifications":{"Depth":"120 mm","Solid":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","Width":"22.5 mm","at DC":"13 mA","title":"3RF2320-1AA04","Height":"95 mm","at 50 Hz":"40 ... 506 V","at 60 Hz":"40 ... 506 V","description":"Solid-state contactor 1-phase 3RF2 AC 51 / 20 A / 40 °C 48-460 V / 24 V DC screw terminal","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","During Operation":"-25 ... +60 °C","Fastening Method":"screw fixing and snap-on mounting on standard mounting rail 35 mm according to IEC 60715","Product Function":"zero-point switching","For Main Contacts":"7 mm","I2t value maximum":"1 800 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","at NH design usable":"3NA6807","Derating Temperature":"40 °C","at 50 Hz rated value":"48 ... 460 V","at 60 Hz rated value":"48 ... 460 V","at AC-51 rated value":"20 A","Design Of The Product":"single-phase","Side-By-Side Mounting":"Yes","of DIAZED fuse usable":"5SB2711","of NEOZED fuse usable":"5SE2320","For Main Current Circuit":"screw-type terminals","Operational Current Minimum":"500 mA","at AC in hot operating state":"20 W","Substance Prohibitance (Date)":"05/28/2009","Insulation Voltage Rated Value":"600 V","Operating Frequency Rated Value":"50 ... 60 Hz","according to UL 508 rated value":"17.6 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":"15 mA","For Auxiliary And Control Contacts":"7 mm","Without Load Current Share Typical":"0.4 W","at AC-51 according to IEC 60947-4-3":"13.2 A","Surge Current Resistance Rated Value":"600 A","Of The Auxiliary And Control Contacts":"M3","at AC in hot operating state per pole":"20 W","reference code according to EN 61346-2":"Q","At Cylindrical Design 10 X 38 Mm Usable":"3NW6005-1; These fuses have a smaller rated current than the semiconductor relays","At Cylindrical Design 14 X 51 Mm Usable":"3NW6105-1; These fuses have a smaller rated current than the semiconductor relays","At Cylindrical Design 22 X 58 Mm Usable":"3NW6205-1; These fuses have a smaller rated current than the semiconductor relays","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":"1","reference code according to IEC 81346-2":"Q","1 Of The Accessories That Can Be Ordered":"terminal cover","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","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":"15 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":"5 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","field-bound HF interference emission according to CISPR11":"Class B for the domestic, business and commercial environments","of gS fuse for semiconductor protection at NH design usable":"3NE1814-0","Design Of The Thread Of The Screw For Securing The Equipment":"M4","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":"3NE8015-1","AWG number as coded connectable conductor cross section for main contacts":"10 ... 14","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":"5SE1325","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":"3NC1450","of back-up R fuse link for semiconductor protection at cylindrical design 22 x 58 mm usable":"3NC2263"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$103.61 – $203.68","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/58c6ee0d6d328f8f1699e03e0f203757.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=209055&mlfb=3RF2320-1AA04"},"ai":{"faq":[{"question":"Will 3RF2320-1AA04 drop into a panel specified around 3RF2310-1AA04 without rewiring?","answer":"Both parts live in the same 22.5 mm SIRIUS solid-state housing and share the DIN-rail footprint, so the mechanical and terminal geometry is interchangeable — the wiring-side swap is straightforward; the electrical rating difference is the part the buyer must verify against the actual load before committing the substitution."},{"question":"What compliance documentation does the brand provide for 3RF2320-1AA04?","answer":"The device carries a UL 508 listing at 17.6 A, a 600 V insulation rating to IEC convention, and a pollution degree 3 rating for industrial atmospheres, with the substance-prohibition compliance dated 05/28/2009 — the standard SIRIUS declaration pack covers RoHS and REACH at the family level, sourced and confirmed per RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RF2320-1AA04","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/3RF2320-1AA04 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}}