{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-4CA15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-4CA15","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-4CA15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-4CA15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1021-4CA15 motor-protective circuit breaker, 22 A continuous, 11 kW at 400 V AC-3, Trip Class 10, IP20 front, screw-type terminals, DIN rail mount.","salesMarkdown":"The Siemens 3RV1021-4CA15 is a SIRIUS motor-protective circuit breaker — the device that sits between the contactor and the motor in a standard motor feeder. Rated continuous current is 22 A, which at 400 V AC-3 translates to 11 kW motor output — typical for a small conveyor, pump, or fan drive. Short-circuit breaking capacity is rated per 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. At 400 V, the 50 kA figure gives plenty of headroom for most industrial distribution panels — you can usually achieve full selectivity with an upstream fuse or molded-case breaker without special coordination studies. The 45 x 97 x 96 mm (W x H x D) footprint fits standard DIN-rail enclosures. Zero clearance required at the back and sides — the device can be butted directly against adjacent breakers or the panel wall, which saves rail space in dense layouts. IP20 on the front face means basic finger protection; no cover is needed for the operator side, but the terminals are live when energized. Main and auxiliary circuits use screw-type terminals. The main circuit accepts solid conductors 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²), and stranded conductors 2x (1…2.5 mm²) or 2x (2.5…6 mm²). Auxiliary/control circuit terminals take 2x (0.5…1.5 mm²) solid or 2x (1…2.5 mm²) stranded — enough for the control wiring from a PLC or relay. ## Auxiliary contacts and diagnostics An auxiliary switch is built in (transverse design), but the base unit ships with zero auxiliary contacts fitted — you add the contact block separately if you need a remote trip signal. Phase failure detection is standard: the breaker will trip if one phase drops out, which is essential for preventing single-phasing damage on three-phase motors. No ground-fault detection on this variant.","metaTitle":"Siemens 3RV1021-4CA15 SIRIUS Motor Circuit Breaker, 22 A, 11","metaDescription":"Siemens 3RV1021-4CA15 SIRIUS motor-protective circuit breaker, 22 A continuous, 11 kW at 400 V, Trip Class 10, IP20 front, DIN rail mount, phase failure detection. Sourced 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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"45 mm","Height":"97 mm","at 24 V":"1 A","at 60 V":"0.15 A","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","at 230 V":"0.5 A","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":"11 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":"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":"22 A","Design Of The Auxiliary Switch":"transverse","For Auxiliary And Control Circuit":"screw-type terminals","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Removable Terminal For Auxiliary And Control Circuit":"No","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","Adjustable Pick-Up Value Current Of The Current-Dependent Overload Release":"17 ... 22 A","type of connectable conductor cross-sections at AWG conductors for auxiliary contacts":"2x (18 ... 14)"}},"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=497306&mlfb=3RV1021-4CA15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-4CA15/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RV1021-4CA15?","answer":"The 3RV1011-1HA10 is a smaller-frame SIRIUS motor-protective breaker but at a lower current rating. It will not drop into the same panel without rewiring because the terminal sizes and trip settings differ. For a direct 22 A / 11 kW replacement, stick with the 3RV1021-4CA15 or its immediate frame siblings."},{"question":"Where can I buy 3RV1021-4CA15 and how is it quoted?","answer":"This part is sourced to order through independent distribution channels. Submit an RFQ for current availability and pricing — each quote is confirmed at time of request with no obligation."},{"question":"What compliance documentation does Siemens provide for 3RV1021-4CA15?","answer":"Standard Siemens documentation includes CE declaration of conformity, RoHS and REACH compliance statements, and the product datasheet. Additional certificates (UL, CSA, CCC) may be available per regional requirements — confirm at quote time."},{"question":"What is the depth of 3RV1021-4CA15?","answer":"The depth is 96 mm, measured from the DIN rail mounting surface to the front of the housing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-4CA15","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/3RV1021-4CA15 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}}