{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-0KA10-0FJ0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-0KA10-0FJ0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-0KA10-0FJ0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0KA10-0FJ0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1021-0KA10-0FJ0-ZX95 motor protection circuit breaker, 1.25 A continuous, 100 kA breaking capacity at 400 V AC, CLASS 10 trip class, 45 mm wide, screw terminals, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RV1021-0KA10-0FJ0-ZX95 is a motor protection circuit breaker rated for a continuous current of 1.25 A, designed to protect a 0.37 kW motor at 400 V AC. Screw-type terminals on the main circuit accept solid or stranded conductors from 1 to 6 mm² (or 14 to 10 AWG), and the IP20 front protection keeps live parts behind the enclosure door. No backwards or side clearance is needed, so it packs tight against adjacent devices. The 100 kA breaking capacity holds across 240 V, 400 V, 500 V, and 690 V AC — that is a flat SCCR curve, not a derated one. For a 1.25 A device this is high headroom; it means the breaker will hold its rating even on a high-fault panel bus. The maximum switching frequency of 15 operations per hour in AC-3 duty limits how often you can cycle a motor start — fine for a conveyor or compressor, not for a rapid-reversing application. Ground fault detection is not included — that would require an external module or a different variant. The auxiliary switch is present (yes), but the base unit carries zero built-in auxiliary contacts; the switch is a separate add-on that mounts to the side. Shock rated at 25 g for 11 ms, surge voltage withstand at 6 kV. Mount it in any position, up to 2 000 m altitude without derating. The 7.25 W power loss in hot operating state (2.4 W per pole) is the heat you need to vent inside the enclosure.","metaTitle":"Siemens 3RV1021-0KA10-0FJ0-ZX95 SIRIUS Motor Protection CB,","metaDescription":"Siemens SIRIUS 3RV1021-0KA10-0FJ0-ZX95 motor protection circuit breaker, 1.25 A continuous, 100 kA breaking at 400 V, CLASS 10 trip, 45 mm wide, 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","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":"0.37 kW","Design of the product":"for motor 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":"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","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"7.25 W","Continuous current rated value":"1.25 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":"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","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":"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=82103&mlfb=3RV1021-0KA10-0FJ0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0KA10-0FJ0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV1021-0KA10-0FJ0-ZX95?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is 3RV1021-0KA10-0FJ0-ZX95's listed depth?","answer":"The depth is 96 mm, with a width of 45 mm and height of 97 mm. It mounts on 35 mm DIN rail with no required backwards or side clearance."},{"question":"What conductor sizes does the 3RV1021-0KA10-0FJ0-ZX95 accept?","answer":"The screw terminals accept solid or stranded conductors: 2x (1 to 2.5 mm²) and 2x (2.5 to 6 mm²), or 2x (14 to 10 AWG). Fine-stranded conductors with ferrule processing are also supported in the same ranges."},{"question":"Will 3RV1021-0KA10-0FJ0-ZX95 drop into a panel specified around 3RV1011-0GA10 without rewiring?","answer":"Both are SIRIUS motor protection circuit breakers on the same 45 mm DIN-rail footprint, but the 3RV1021 series is the higher-breaking-capacity platform (100 kA flat across voltages) versus the 3RV1011 series. The terminal layout and screw-type connections are the same, so a direct mechanical swap is possible, but verify the continuous current rating and trip class match your motor — the 3RV1021-0KA10-0FJ0-ZX95 is a 1.25 A CLASS 10 device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-0KA10-0FJ0-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/3RV1021-0KA10-0FJ0-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}}