{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1321-0FC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1321-0FC10","canonicalUrl":"https://aoctrl.com/siemens/3RV1321-0FC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1321-0FC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker for starter combinations, 3RV1321-0FC10, 0.5 A continuous current, 100 kA breaking capacity at 400 V AC, IP20, screw terminals.","salesMarkdown":"The Siemens SIRIUS 3RV1321-0FC10 is a circuit breaker designed for starter combinations — meaning it integrates directly into a motor starter assembly, combining short-circuit and overload protection in one device. For a 400 V motor load, the rated power is 0.12 kW — a small motor, fractional-horsepower class. The 5.5 W power dissipation in hot operating state (1.8 W per pole) matters for enclosure heat rise; if you pack several of these in a small cabinet, add that to your thermal budget. ## Mounting and integration — DIN-rail fit The 45 mm width (3 module spaces) and 96 mm depth fit standard enclosure layouts. Zero clearance required at the back or sides, so it can butt against adjacent devices. Any mounting position is allowed — no derating for orientation. Screw-type terminals for both main and auxiliary/control circuits accept solid or stranded conductors: 2x (1 … 2.5 mm²) and 2x (2.5 … 6 mm²) per clamp. AWG equivalents are 2x (14 … 10). RoHS compliance date is 01.05.2012, meaning it meets the EU RoHS directive from that date forward. The surge voltage resistance is rated at 6,000 V, and touch protection is finger-safe per IP20. Ground fault and phase failure detection are not built in — those functions would need an external relay or a different SIRIUS variant.","metaTitle":"Siemens 3RV1321-0FC10 SIRIUS Circuit Breaker, 0.5 A, 100 kA","metaDescription":"Siemens SIRIUS 3RV1321-0FC10 circuit breaker for starter combinations. 0.5 A continuous, 100 kA breaking capacity at 400 V. DIN-rail mount, IP20 front. Active lifecycle. Order agai","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 standard mounting 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":"0.12 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":"100 kA","at AC at 400 V rated value":"100 kA","at AC at 500 V rated value":"100 kA","at AC at 690 V rated value":"100 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"5.5 W","Substance Prohibitance (Date)":"01.05.2012 00:00:00","Continuous Current Rated Value":"0.5 A","at AWG cables for main contacts":"2x (14 ... 10)","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":"1.8 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":"0.5 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 Function Removable Terminal For Auxiliary And Control Circuit":"No","Mechanical Service Life (Switching 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=131573&mlfb=3RV1321-0FC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1321-0FC10/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RV1321-0FC10?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published here."},{"question":"What is the breaking capacity of the 3RV1321-0FC10?","answer":"100 kA at 400 V AC, and the same 100 kA at 240 V, 500 V, and 690 V AC. That high interrupting rating makes it suitable for high-fault-current panels without needing upstream fuses to coordinate."},{"question":"Will the 3RV1321-0FC10 drop into a panel designed for the 3RV1011-0GA10?","answer":"Both are SIRIUS circuit breakers on the same 45 mm DIN-rail footprint with screw terminals, so the physical swap is straightforward. Verify the continuous current rating (0.5 A on this part) matches your motor FLA — the 3RV1011-0GA10 may have a different current setting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1321-0FC10","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/3RV1321-0FC10 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}}