{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-4BA15-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-4BA15-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-4BA15-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-4BA15-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1021-4BA15-0BA0, 20 A continuous rated current, Class 10 trip, 50 kA breaking capacity at 400 V AC, screw-type terminals, IP20 front.","salesMarkdown":"It carries a continuous rated current of 20 A and a trip class of CLASS 10, meaning it will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during locked-rotor conditions. Breaking capacity is rated at 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 — these figures tell you the maximum fault current the breaker can safely interrupt at each voltage level, critical for verifying SCCR compliance in the panel. Ground fault detection is not included, so if that's required, you'd need a separate ground-fault relay or a different breaker variant. Depth is 96 mm, so check gland plate clearance if the panel is shallow. Main and auxiliary/control circuits use screw-type terminals. The main contacts accept solid conductors: 2× (0.5–1.5 mm²) or 2× (0.75–2.5 mm²), and stranded: 2× (1–2.5 mm²) or 2× (2.5–6 mm²). AWG equivalents for the main contacts are 2× (14–10). The auxiliary switch is a transverse design and is field-installable.","metaTitle":"Siemens 3RV1021-4BA15-0BA0 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV1021-4BA15-0BA0 motor protection circuit breaker, 20 A continuous, Class 10 trip, 50 kA breaking at 400 V. Active 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 (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","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-50 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting 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)":"01.05.2012","Continuous Current Rated Value":"20 A","Design Of The Auxiliary Switch":"transverse","at AWG cables for main contacts":"2x (14 ... 10)","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 AWG cables for auxiliary contacts":"2x (18 ... 14)","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","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 (Switching Cycles) Of The Main Contacts Typical":"500","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=417606&mlfb=3RV1021-4BA15-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-4BA15-0BA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV1021-4BA15-0BA0 at 400 V?","answer":"The breaking capacity at 400 V AC is 50 kA, which is the maximum fault current the breaker can safely interrupt at that voltage."},{"question":"Where can I buy 3RV1021-4BA15-0BA0?","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":"Does 3RV1021-4BA15-0BA0 include phase failure protection?","answer":"Yes, phase failure detection is built in, so the breaker will trip if one phase is lost — protecting the motor from single-phasing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-4BA15-0BA0","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/3RV1021-4BA15-0BA0 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}}