{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1KA10-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1KA10-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1KA10-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1KA10-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, motor protection circuit breaker, 3RV2021-1KA10-ZX95, CLASS 10, 12.5 A operational current, 163 A instantaneous short-circuit trip, 100 kA breaking capacity at 400 V AC, size S0, screw terminals.","salesMarkdown":"The adjustable overload release (A-release) covers 9 to 12 A, and the magnetic short-circuit release (N-release) is fixed at 163 A. These figures let you coordinate downstream contactors and feeders: the breaker takes the high fault energy, so the contactor only needs to break its own rated current. For a 12.5 A motor circuit on a 400 V supply with a high available fault current (say, near a large transformer), this breaker gives you the SCCR headroom to avoid cascading failures upstream. The A-release is set via a rotary dial on the front; the handle shows the switching status visually. An integrated auxiliary switch (1 NO + 1 NC contact) is included, so you can feed a PLC input or a contactor coil without adding a separate block. The size S0 footprint — 45 mm wide — matches the standard SIRIUS contactor comb footprint for direct motor starter assemblies.","metaTitle":"Siemens 3RV2021-1KA10-ZX95 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV2021-1KA10-ZX95 motor protection circuit breaker, CLASS 10, 12.5 A, 100 kA at 400 V AC. Current lifecycle stage. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Trip Class":"CLASS 10","Rated Value":"20 ... 690 V","lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 500 V rated value":"42 kA","at 690 V rated value":"4 kA","Design Of The Product":"For motor protection","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","Substance Prohibitance (Date)":"10/01/2009","Operational Current Rated Value":"12.5 A","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"163 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=3592&mlfb=3RV2021-1KA10-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1KA10-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV2021-1KA10-ZX95 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 3RV2021-1KA10-ZX95's listed trip class?","answer":"The trip class is CLASS 10, meaning the breaker will trip within 10 seconds at 7.2× the set overload current, protecting standard induction motors from locked-rotor overheating."},{"question":"What is 3RV2021-1KA10-ZX95's rated voltage range?","answer":"The rated voltage range is 20 to 690 V AC, covering standard low-voltage motor circuits from 24 V control transformers up to 690 V industrial supplies."},{"question":"Will 3RV2021-1KA10-ZX95 drop into a panel specified around 3RV2021-1FA15 without rewiring?","answer":"Both are size S0 breakers with the same 45 mm width and screw-terminal main connections, so the physical fit and wiring are identical. The key difference is the current rating: the 3RV2021-1KA10-ZX95 is set for 9–12 A (163 A magnetic trip), while the 3RV2021-1FA15 covers 3.5–5 A (65 A magnetic trip). If the motor FLA falls within 9–12 A, it drops in without rewiring; if the circuit was designed for a 5 A motor, the higher magnetic trip of 163 A would not provide adequate short-circuit protection."},{"question":"What compliance documentation does this breaker provide?","answer":"The RoHS compliance date is 10/01/2009. The breaker carries IEC 60947-2 and IEC 60947-4-1 design approvals as a SIRIUS product. For specific UL/CSA file numbers or CE declarations, the manufacturer's documentation should be referenced."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1KA10-ZX95","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/3RV2021-1KA10-ZX95 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}}