{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1421-4BA10-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1421-4BA10-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV1421-4BA10-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1421-4BA10-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1421-4BA10-ZX95 motor-protective circuit breaker, 20 A rated continuous current, CLASS 10 trip class, 50 kA breaking capacity at 400 V AC, screw-type terminals, 45 mm wide.","salesMarkdown":"## Transformer-protection circuit breaker, 20 A, CLASS 10 The Siemens SIRIUS 3RV1421-4BA10-ZX95 is a motor-protective circuit breaker specifically designed for transformer protection, carrying a 20 A rated continuous current and CLASS 10 trip characteristic. Screw-type terminals on the main circuit accept 2x (1 to 2.5 mm²) solid or stranded, or 2x (2.5 to 6 mm²) — the larger range handles the 20 A feed without pigtails. The auxiliary switch slot is present but unpopulated (0 auxiliary contacts factory-fitted), so plan an add-on block if remote status or fault signaling is needed. ## Breaking capacity and trip coordination Rated breaking capacity drops with system voltage: 100 kA at 240 V AC, 50 kA at 400 V AC, 10 kA at 500 V AC, and 4 kA at 690 V AC. The 6 kV surge voltage resistance (rated impulse withstand) covers standard industrial transient environments. No ground-fault detection on this variant — that requires the 3RV19xx accessory module or an external relay. Zero mm clearance needed at the sides or rear — stackable against adjacent devices. Shock rated at 25 g for 11 ms, which is typical for panel-mounted breakers in machinery with vibration. Front face carries IP20 finger protection — safe for open-panel installation but not for washdown zones. The 96 mm depth fits standard 100 mm deep enclosures without forcing a taller gland plate.","metaTitle":"Siemens 3RV1421-4BA10-ZX95 SIRIUS Circuit Breaker, 20 A, CLA","metaDescription":"Siemens SIRIUS 3RV1421-4BA10-ZX95 motor-protective circuit breaker, 20 A rated, CLASS 10 trip, 50 kA at 400 V. Screw terminals, DIN-rail mount. Available 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","Maximum":"2 000 m","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","On The Front":"IP20","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Shock resistance":"25g / 11 ms","Mounting position":"any","Product brand name":"SIRIUS","Product designation":"circuit breaker","at 400 V rated value":"20 A","Design of the product":"for transformer protection","For Auxiliary Contacts":"0","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":"50 kA","at AC at 500 V rated value":"10 kA","at AC at 690 V rated value":"4 kA","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"10.5 W","Continuous current rated value":"20 A","at AWG conductors for main contacts":"2x (14 ... 10)","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","For Auxiliary And Control Current Circuit":"screw-type terminals","Removable Terminal For Auxiliary And Control Circuit":"No","Design of the overcurrent release and short-circuit release":"thermomagnetic","Arrangement of electrical connectors for main current circuit":"front side","Adjustable pick-up value current of the current-dependent overload release":"14 ... 20 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=82383&mlfb=3RV1421-4BA10-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1421-4BA10-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV1421-4BA10-ZX95?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source to 3RV1421-4BA10-ZX95?","answer":"The SIRIUS 3RV6011-0CA10 is a functional peer in the same product class but carries different ratings — verify the continuous current and trip class against your BOM before substituting. The 3RV1421-4BA10-ZX95 is transformer-protection specific, while the 3RV6011-0CA10 is a general motor-protective breaker."},{"question":"What is the depth of 3RV1421-4BA10-ZX95?","answer":"The depth is 96 mm, which fits standard 100 mm deep enclosures."},{"question":"What conductor sizes does the 3RV1421-4BA10-ZX95 accept?","answer":"Solid and stranded conductors: 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²). AWG equivalent for main contacts is 2x (14 to 10)."},{"question":"Will 3RV1421-4BA10-ZX95 drop into a panel specified around 3RV6011-0CA10?","answer":"Both are DIN-rail mountable 45 mm wide SIRIUS breakers, so the physical footprint matches. However, the 3RV1421-4BA10-ZX95 is a transformer-protection variant with a different trip curve — verify the 20 A setting and CLASS 10 trip against the original design before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1421-4BA10-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/3RV1421-4BA10-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}}