{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-0KA20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-0KA20","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-0KA20","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-0KA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2021-0KA20, Size S0, 100 kA interrupting capacity at 400 V, Trip Class 10, spring-loaded terminals.","salesMarkdown":"The breaker is active in the current lifecycle stage, so it remains a standard BOM line item rather than a last-time-buy scavenge. Width is 45 mm, depth 97 mm, height 119 mm — fits a standard 45 mm slot on a DIN rail; the S0 frame leaves room for adjacent breakers in a motor control center. Any mounting position is allowed, so vertical or horizontal rail orientation works. Clearance: 50 mm above and below, 30 mm to the side, zero forward or backward — the breaker sits flush against the backplane.","metaTitle":"Siemens 3RV2021-0KA20 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2021-0KA20 SIRIUS motor protection circuit breaker, Size S0, 100 kA SCCR at 400 V, Trip Class 10, spring-loaded terminals, active lifecycle. Sourced to order; request qu","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"97 mm","Width":"45 mm","Height":"119 mm","Upwards":"50 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"20 ... 690 V","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","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 60715","at AC-3e maximum":"15 1/h","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"0.2 kW","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"1.25 A","at 500 V rated value":"100 kA","at 600 V rated value":"1.25 A","at 690 V rated value":"100 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"spring-loaded terminals","at 460/480 V rated value":"1 hp","at 575/600 V rated value":"0.5 hp","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","Design Of Screwdriver Shaft":"Diameter 3 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"3,0 x 0,5 mm","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"7.25 W","at AC-3 at 400 V rated value":"1.25 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"1.25 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"1.25 A","at AWG cables for main contacts":"2x (18 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"2.4 W","With Side-By-Side Mounting At The Side":"0 mm","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (1 ... 6 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","Finely Stranded Without Core End Processing":"2x (1 ... 6 mm²)","with high demand rate according to SN 31920":"50 %","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"25g / 11 ms","Electrical Endurance (Switching Cycles) Typical":"100 000","Size Of Contactor Can Be Combined Company-Specific":"S00, S0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"16 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","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":"https://cdn.aoctrl.com/69e3aae776a3a972c11948ccacc118a3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=57250&mlfb=3RV2021-0KA20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-0KA20/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3RV2021-0KA20?","answer":"The breaker has a 100 kA interrupting capacity at 400 V AC, which means it can safely interrupt faults up to 100 kA at that voltage — sufficient for most industrial panel SCCR requirements."},{"question":"Will 3RV2021-0KA20 drop into a panel specified around 3RV2011-0BA20?","answer":"Both are Size S0 breakers with the same DIN rail mounting and similar terminal style, so the 3RV2021-0KA20 will physically fit in a panel designed for the 3RV2011-0BA20 without rewiring. However, verify the trip class and current rating match your motor protection settings before substitution."},{"question":"How do I get current pricing and availability for 3RV2021-0KA20?","answer":"Submit an RFQ through this listing. The part is sourced to order against your request, and availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-0KA20","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/3RV2021-0KA20 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}}