{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-4BA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-4BA10","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-4BA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-4BA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, motor-protective circuit breaker, 3RV1021-4BA10, 20 A continuous, CLASS 10, 3-pole, 50 kA breaking capacity at 400 V AC, screw terminals, DIN rail mount.","salesMarkdown":"It protects three-phase motor loads up to 7.5 kW at 400 V AC, with a maximum operating voltage of 690 V AC-3. ## Trip class and motor protection That's the standard for standard-duty induction motors — it lets the motor start and accelerate under load without nuisance tripping, but clears fast enough to prevent winding damage on a locked-rotor condition. Ground fault detection is not included — if that's required, you'd add a separate ground-fault relay or choose a variant with the G option. The interrupting rating drops as voltage rises: 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. At 400 V — the most common industrial supply — 50 kA covers virtually any panelboard fault current you'll encounter in a standard MCC or distribution board. Depth is 96 mm, height 97 mm. Mounting position is any orientation. The IP20 front protection means the front is finger-safe when installed in an enclosure; the terminals themselves require the panel door to be closed or a separate terminal cover. Accepts solid or stranded conductors: two conductors per terminal, either 1–2.5 mm² or 2.5–6 mm². For finely stranded wire with ferrule, same ranges apply. The backwards clearance is 0 mm, meaning the terminals are flush with the back of the housing — no extra space needed behind the DIN rail for wiring. Side clearance is also 0 mm, so units can be ganged side-by-side without spacing.","metaTitle":"Siemens 3RV1021-4BA10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV1021-4BA10 SIRIUS motor-protective circuit breaker. 20 A continuous, CLASS 10 trip, 50 kA at 400 V. 3-pole, screw terminals, DIN rail mount. Active production. Quoted to","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 DIN 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":"7.5 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":"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","at AC in hot operating state":"10.5 W","Substance Prohibitance (Date)":"05/01/2012","Continuous Current Rated Value":"20 A","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":"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","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":"20 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 (Operating Cycles) Of The Main Contacts Typical":"100 000","Adjustable Current Response 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=42683&mlfb=3RV1021-4BA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-4BA10/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 3RV1021-4BA10 accept?","answer":"Screw terminals accept solid or stranded conductors: 2x (1–2.5 mm²) or 2x (2.5–6 mm²). Finely stranded with ferrule uses the same ranges."},{"question":"Does the 3RV1021-4BA10 have phase failure protection?","answer":"Yes, phase failure detection is built in. Ground fault detection is not included."},{"question":"What compliance documentation is available for the 3RV1021-4BA10?","answer":"RoHS compliance date is May 1, 2012. The product carries Siemens SIRIUS brand documentation. For specific declarations (CE, UL, IEC), request the manufacturer's declaration with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-4BA10","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/3RV1021-4BA10 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}}