{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1321-4AH10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1321-4AH10","canonicalUrl":"https://aoctrl.com/siemens/3RV1321-4AH10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1321-4AH10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, circuit breaker for starter combinations, 3RV1321-4AH10, rated 16 A continuous, 7.5 kW at 400 V AC-3, 25 kA breaking capacity at 400 V AC, screw terminals, 3-pole, IP20 front, DIN rail mount.","salesMarkdown":"Rated 16 A continuous current, it handles motor loads up to 7.5 kW at 400 V AC-3 (the standard duty cycle for squirrel-cage motors), so it holds takt time on a conveyor or pump line without nuisance tripping. Breaking capacity hits 25 kA at 400 V AC — enough to clear a fault on a typical 400 V distribution board without upstream fuse coordination worries, and still 50 kA at 240 V for lower-voltage industrial panels. Accepts solid or stranded conductors: 1 to 2.5 mm² per clamp, or 2.5 to 6 mm² with two wires per terminal. Zero clearance needed at the sides or back, so you can pack multiple units tight on the rail for a dense panel layout. Finger-safe touch protection on the front (IP20) keeps live parts covered for safe operation in an enclosure. Dimensions: 45 mm wide, 97 mm high, 96 mm deep — fits standard 45 mm comb busbar spacing and leaves room for a contactor alongside on the same rail. For compliance documentation: the RoHS substance prohibition date is May 1, 2012, so it meets EU RoHS requirements. The SIRIUS family carries UL/CSA/CE approvals typical for industrial control gear, though specific certs are not listed in this excerpt. If your motor plate says 7.5 kW, this breaker is sized correctly for the starting inrush and running current. Shock rated 25g / 11 ms — survives forklift drops and panel vibration on a moving line.","metaTitle":"Siemens 3RV1321-4AH10 SIRIUS Circuit Breaker, 16 A, 7.5 kW a","metaDescription":"Siemens 3RV1321-4AH10 SIRIUS circuit breaker for starter combinations. 16 A continuous, 7.5 kW at 400 V AC-3, 25 kA breaking capacity at 400 V. Screw terminals, DIN rail mount. Act","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"96 mm","Solid":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Width":"45 mm","Height":"97 mm","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Backwards":"0 mm","At The Side":"0 mm","Rated Value":"690 V","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","Shock Resistance":"25g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"circuit breaker","at 400 V rated value":"7.5 kW","Design Of The Product":"for starter combinations","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"screw-type terminals","at AC at 240 V rated value":"50 kA","at AC at 400 V rated value":"25 kA","at AC at 500 V rated value":"6 kA","at AC at 690 V rated value":"2 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"3.5 W","Substance Prohibitance (Date)":"05/01/2012","Continuous Current Rated Value":"16 A","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","operating frequency at AC-3 maximum":"15 1/h","Surge Voltage Resistance Rated Value":"6 000 V","at AC in hot operating state per pole":"1.2 W","Finely Stranded With Core End Processing":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","operational current at AC-3 at 400 V rated value":"16 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Overcurrent Release And Short-Circuit Release":"magnetic","Arrangement Of Electrical Connectors For Main Current Circuit":"front side","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Mechanical Service Life (Operating Cycles) Of The Main Contacts Typical":"100 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=352707&mlfb=3RV1321-4AH10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1321-4AH10/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 3RV1321-4AH10 and a standard motor circuit breaker?","answer":"This is a standard motor circuit breaker, but specifically designed for starter combinations — it integrates directly with a contactor (like the 3RT series) for coordinated motor starting and protection in a compact footprint."},{"question":"Does 3RV1321-4AH10 accept aluminum wire?","answer":"The terminal specs list solid and stranded copper conductors only (1 to 2.5 mm² or 2.5 to 6 mm² per clamp). Aluminum wire is not mentioned and is not recommended without manufacturer guidance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1321-4AH10","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/3RV1321-4AH10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}