{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-0KA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-0KA10","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-0KA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0KA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1021-0KA10, 1.25 A rated continuous current, Class 10 trip, 100 kA breaking capacity at 400 V AC, screw terminals, IP20 front.","salesMarkdown":"The Siemens 3RV1021-0KA10 is a SIRIUS motor protection circuit breaker rated for 1.25 A continuous current, sized for a 0.37 kW motor at 400 V AC. For a motor branch that needs ground-fault protection, pair it with a separate ground-fault relay or choose a variant that includes it. The 45 mm width occupies a single modular unit — plan for one 45 mm slot in the enclosure layout. Depth is 96 mm, height 97 mm. Solid and stranded conductors accepted: 2× (1 … 2.5 mm²) and 2× (2.5 … 6 mm²) per terminal, or AWG 14–10 for the main contacts. Finely stranded with ferrule is also supported at the same cross-sections. RoHS compliance date is 01.05.2012, confirming it meets the EU RoHS directive for hazardous substance restrictions. No UL or CSA listing is explicitly stated in the evidence, but the SIRIUS series typically carries IEC certification (EN 60947). Verify specific agency approvals with the order desk if your panel requires UL listing. ## Electrical and Environmental Ratings Rated insulation voltage 690 V; maximum operating voltage in AC-3 duty is also 690 V. Surge voltage withstand is 6 kV. Operating frequency at AC-3 is 15 operations per hour maximum — adequate for infrequent motor starts; not for high-cycling applications like rapid reversing. Power dissipation: 7.25 W total in hot operating state, or 2.4 W per pole. Factor this into enclosure thermal calculations — at 7.25 W, it's a modest heat source but should not be buried next to other high-dissipation devices without airflow. Shock resistance 25 g for 11 ms — robust enough for most industrial machinery but not rated for continuous vibration environments like crushers or shakers.","metaTitle":"Siemens 3RV1021-0KA10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV1021-0KA10 SIRIUS motor protection circuit breaker, 1.25 A continuous, Class 10 trip, 100 kA breaking capacity at 400 V. Active 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 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":"0.37 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":"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":"7.25 W","Substance Prohibitance (Date)":"01.05.2012 00:00:00","Continuous Current Rated Value":"1.25 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","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":"2.4 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":"1.25 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 (Switching Cycles) Of The Main Contacts Typical":"100 000","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.9 ... 1.25 A"}},"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=144947&mlfb=3RV1021-0KA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0KA10/alternatives.json"},"ai":{"faq":[{"question":"Will 3RV1021-0KA10 drop into a panel specified for 3RV1011-0HA10?","answer":"Both are SIRIUS motor protection breakers with the same 45 mm width and DIN-rail mounting. The 3RV1021-0KA10 has a 1.25 A rating and Class 10 trip; the 3RV1011-0HA10 is a different current rating. Check your motor FLA — if it matches 1.25 A, the footprint and wiring scheme are compatible. Terminal sizes and conductor ranges are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-0KA10","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/3RV1021-0KA10 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}}