{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1321-4DC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1321-4DC10","canonicalUrl":"https://aoctrl.com/siemens/3RV1321-4DC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1321-4DC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker for starter combinations, 3RV1321-4DC10, 25 A continuous, 11 kW at 400 V AC-3, 50 kA breaking capacity at 400 V, IP20 finger-safe, screw terminals, DIN rail mount.","salesMarkdown":"The 45 mm width (3-module) footprint is standard for this class — fits a typical 8-module enclosure with room for a contactor and auxiliary alongside. The IP20 finger-safe front means the busbars and terminals are touch-protected from the front, but the interior still needs enclosure protection against dust and moisture. ## Terminal and wiring Each pole accepts 2x (1–2.5 mm²) solid or stranded, or 2x (2.5–6 mm²) — the dual-entry lets you loop-through without a separate terminal block. AWG equivalent is 2x (14–10). No backwards clearance needed, and 0 mm side clearance means you can butt adjacent devices. The 0.2–2.5 mm² range covers standard control wiring; the 2.5–6 mm² range handles the motor power tails. ## Protection and environment Shock resistance is 25g for 11 ms, which is typical for industrial panel mounting near rotating machinery. No ground fault or phase failure detection built in — this is a straight thermal-magnetic overload and short-circuit protector for three-phase motors. ## Power dissipation and auxiliary options That's moderate — expect some heat rise in a sealed enclosure, but nothing that forces derating in a standard ventilated panel at 40 °C ambient. The breaker accepts an auxiliary switch (product extension auxiliary switch = Yes), so you can add a signal contact for remote status indication or PLC feedback. Maximum switching frequency at AC-3 is 15 operations per hour — fine for pump or fan cycling, not for high-speed jogging.","metaTitle":"Siemens 3RV1321-4DC10 SIRIUS Circuit Breaker, 25 A, 11 kW at","metaDescription":"Siemens 3RV1321-4DC10 SIRIUS circuit breaker for starter combinations. 25 A continuous, 11 kW at 400 V AC-3. 50 kA breaking at 400 V. IP20 finger-safe. DIN rail mount. Current prod","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","lifecycle_stage":"current","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":"11 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":"50 kA","at AC at 500 V rated value":"10 kA","at AC at 690 V rated value":"4 kA","at AC in hot operating state":"10.5 W","Operating Voltage Rated Value":"690 V","Substance Prohibitance (Date)":"01.05.2012 00:00:00","Continuous Current Rated Value":"25 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","Ambient Temperature During Storage":"-50 ... +80 °C","Product Extension Auxiliary Switch":"Yes","operating frequency at AC-3 maximum":"15 1/h","Ambient Temperature During Operation":"-20 ... +60 °C","Ambient Temperature During Transport":"-50 ... +80 °C","Surge Voltage Resistance Rated Value":"6 000 V","at AC in hot operating state per pole":"3.5 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","operating voltage at AC-3 rated value maximum":"690 V","operational current at AC-3 at 400 V rated value":"25 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=318220&mlfb=3RV1321-4DC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1321-4DC10/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3RV1321-4DC10?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is the depth of 3RV1321-4DC10?","answer":"The depth is 96 mm, with a width of 45 mm and height of 97 mm."},{"question":"What wire sizes does the 3RV1321-4DC10 accept?","answer":"Screw terminals accept 2x (1–2.5 mm²) or 2x (2.5–6 mm²) solid or stranded, AWG 2x (14–10)."},{"question":"Will 3RV1321-4DC10 drop into a panel specified for 5SJ3140-7?","answer":"No — the 5SJ3140-7 is a Siemens 5SJ miniature circuit breaker (MCB) for branch circuit protection, not a motor starter combination breaker. The 3RV1321-4DC10 is a different form factor (45 mm wide vs 18 mm per pole) and serves a different function (motor overload + short-circuit vs. cable protection). Rewiring and panel layout changes would be required."},{"question":"What compliance documentation does Siemens provide for 3RV1321-4DC10?","answer":"The part carries a substance prohibitance date of 01.05.2012, indicating RoHS compliance. Standard documentation includes the CE declaration, UL/CSA file, and IEC 60947-2 test reports. Request specific certificates with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1321-4DC10","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/3RV1321-4DC10 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}}