{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1JA20-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1JA20-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1JA20-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1JA20-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2021-1JA20-0BA0, S0 frame, Trip Class 10, 100 kA breaking capacity at 400 V AC, spring-loaded terminals, screw and snap-on DIN rail mounting.","salesMarkdown":"It combines a thermal-magnetic overload relay and a short-circuit trip in one device, saving panel space and wiring compared to a separate contactor-plus-overload combination. Rated motor power is 2.2 kW at 230 V. The device detects phase failure — a common cause of single-phasing damage in delta-connected motors — and trips on loss of one phase. ## Mounting and wiring — DIN rail, spring terminals The S0 frame footprint — 45 mm wide, 119 mm tall, 97 mm deep — fits standard motor starter assemblies alongside a SIRIUS contactor of matching frame size. No screw torque to set — strip, insert, release. The screwdriver shaft for the terminal release is 3 mm diameter. Temperature compensation is active from -20 to +60 °C, keeping the thermal trip curve stable across the panel's ambient swing.","metaTitle":"Siemens 3RV2021-1JA20-0BA0 SIRIUS Motor Protection CB, Class","metaDescription":"Siemens 3RV2021-1JA20-0BA0 SIRIUS motor protection circuit breaker, S0 frame, Trip Class 10, 100 kA at 400 V AC, spring-loaded terminals. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"97 mm","Width":"45 mm","Height":"119 mm","Upwards":"50 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"20 ... 690 V","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","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 60715","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"2.2 kW","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 500 V rated value":"42 kA","at 690 V rated value":"4 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"spring-loaded terminals","Temperature Compensation":"-20 ... +60 °C","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":"42 kA","at AC at 690 V rated value":"6 kA","Design Of Screwdriver Shaft":"Diameter 3 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"3,0 x 0,5 mm","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"500","at AC in hot operating state":"9.25 W","at AC-3 at 400 V rated value":"10 A","Of Auxiliary Contacts Typical":"500","Substance Prohibitance (Date)":"10/01/2009","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"10 A","Design Of The Short-Circuit Trip":"magnetic","Between Main And Auxiliary Circuit":"400 V","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"3.1 W","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (1 ... 6 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","Finely Stranded Without Core End Processing":"2x (1 ... 6 mm²)","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"25g / 11 ms","Electrical Endurance (Switching Cycles) Typical":"500","Size Of Contactor Can Be Combined Company-Specific":"S00, S0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"130 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"7 ... 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/69e3aae776a3a972c11948ccacc118a3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1034887&mlfb=3RV2021-1JA20-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1JA20-0BA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 3RV2021-1JA20-0BA0 at 400 V?","answer":"100 kA at 400 V AC. At 690 V AC it is 4 kA."},{"question":"What compliance documentation is available for this circuit breaker?","answer":"The evidence does not list specific compliance documents (RoHS, REACH, UL, IEC). Standard SIRIUS documentation is provided by Siemens; verify the specific declarations with your order."},{"question":"Where can I buy the 3RV2021-1JA20-0BA0 and get current pricing?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1JA20-0BA0","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/3RV2021-1JA20-0BA0 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}}