{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-1KA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-1KA10","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-1KA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-1KA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1021-1KA10, motor-protective circuit breaker, 12.5 A continuous, CLASS 10 trip class, 100 kA breaking capacity at 400 V AC, screw terminals, 45 mm width, DIN-rail snap-on.","salesMarkdown":"## SIRIUS 3RV1021-1KA10 — Motor-Protective Circuit Breaker, 12.5 A, CLASS 10 The Siemens SIRIUS 3RV1021-1KA10 is a motor-protective circuit breaker designed for 3-phase motor branch circuits. It carries a continuous current rating of 12.5 A and a CLASS 10 trip characteristic, meaning it opens within 10 seconds at 7.2× rated current — fast enough to protect standard induction motors against locked-rotor conditions without nuisance tripping on normal starting inrush. Breaking capacity is 100 kA at 400 V AC, dropping to 42 kA at 500 V and 6 kA at 690 V. The 45 mm width (3-module) footprint and any mounting position make it straightforward to integrate into existing motor control center layouts or standalone enclosures. Main and auxiliary/control circuits both use screw-type terminals. The main circuit accepts solid or stranded conductors: 2× (1…2.5 mm²) and 2× (2.5…6 mm²). Finely stranded with core-end processing follows the same cross-section range. Zero backward clearance requirement simplifies panel layout — no extra space needed behind the DIN rail for terminal access. Ground fault detection is not included; that function is handled separately by a residual-current device if required. An auxiliary switch can be added via the product extension slot. Shock resistance rated at 25g for 11 ms. IP20 finger-safe touch protection on the front — suitable for enclosed panels where operators may open the door for inspection.","metaTitle":"Siemens 3RV1021-1KA10 SIRIUS Motor Circuit Breaker, 12.5 A,","metaDescription":"Siemens SIRIUS 3RV1021-1KA10 motor-protective circuit breaker. 12.5 A continuous, CLASS 10 trip, 100 kA at 400 V. DIN-rail mount. Current production. Quoted to order.","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","Trip Class":"CLASS 10","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":"5.5 kW","Design Of The Product":"for motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","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":"42 kA","at AC at 690 V rated value":"6 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"9.25 W","Substance Prohibitance (Date)":"05/01/2012","Continuous Current Rated Value":"12.5 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":"3.1 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":"12.5 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Overcurrent Release And Short-Circuit Release":"thermomagnetic","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","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"9 ... 12.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$68.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=89966&mlfb=3RV1021-1KA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-1KA10/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV1021-1KA10 at 400 V?","answer":"100 kA at 400 V AC. At 500 V it drops to 42 kA, and at 690 V to 6 kA."},{"question":"Will 3RV1021-1KA10 drop into a panel specified around 3RV1011-1HA10 without rewiring?","answer":"The 3RV1021-1KA10 shares the same 45 mm width and DIN-rail snap-on mounting as the 3RV1011 series, so it fits the same rail footprint. Terminal layout and wire ranges (solid/stranded 1…6 mm²) are identical, so no rewiring is needed for the main circuit. Verify auxiliary contact wiring if the original panel used a different auxiliary switch configuration."},{"question":"Where can I buy 3RV1021-1KA10 and how is it quoted?","answer":"The part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for your target quantity."},{"question":"What compliance documentation does Siemens provide for 3RV1021-1KA10?","answer":"The part carries a substance prohibitance date of 05/01/2012, consistent with RoHS compliance. It is designed to meet IEC 60947-2 overvoltage category requirements (6000 V surge voltage resistance). UL/CSA certification is standard for the SIRIUS series, though specific file numbers should be confirmed against the nameplate marking on the unit received."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-1KA10","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/3RV1021-1KA10 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}}