{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4AA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4AA40","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4AA40","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4AA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, motor protection circuit breaker, 3RV2021-4AA40, Trip Class 10, 25 kA at 400 V, 45 mm width, screw and snap-on mounting.","salesMarkdown":"No ground-fault detection on this variant — that's a separate module if you need it. Any mounting position is allowed. Ring cable lug connection on the main circuit — M4 terminal screws. That's tight enough for a dense panel if you stagger the breakers. ## Breaking capacity by voltage The interrupting ratings step down with voltage: 100 kA at 240 V AC, 25 kA at 400 V, 5 kA at 500 V, 2 kA at 690 V. The gL/gG fuse coordination limits are 63 A at 400 V, 50 A at 500 V, and 40 A at 690 V — upstream fuse sizing must stay within those limits to guarantee the listed breaking capacity. ## Ambient conditions Rated for operation from -20 to +60 °C, with temperature compensation active across that range. Storage and transport handle -50 to +80 °C. Maximum switching rate under AC-3 duty is 15 operations per hour.","metaTitle":"Siemens SIRIUS 3RV2021-4AA40 Motor Protection Circuit Breake","metaDescription":"Siemens SIRIUS 3RV2021-4AA40 motor protection circuit breaker, Trip Class 10, 25 kA breaking capacity at 400 V. Phase failure detection, DIN rail mount. Sourced to order against RF","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"97 mm","Width":"45 mm","Height":"97 mm","Upwards":"50 mm","Forwards":"0 mm","at 400 V":"gL/gG 63 A","at 500 V":"gL/gG 50 A","at 690 V":"gL/gG 40 A","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":"-20 ... +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","For Main Contacts":"M4","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"2 hp","at 240 V rated value":"100 kA","at 400 V rated value":"25 kA","at 480 V rated value":"16 A","at 500 V rated value":"5 kA","at 600 V rated value":"16 A","at 690 V rated value":"2 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"Ring cable lug connection","Temperature Compensation":"-20 ... +60 °C","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"55 kA","at AC at 500 V rated value":"10 kA","at AC at 690 V rated value":"4 kA","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"size 2 and Pozidriv 2","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"9.25 W","at AC-3 at 400 V rated value":"16 A","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"16 A","Design Of The Short-Circuit Trip":"magnetic","For Auxiliary And Control Circuit":"ring terminal lug connection","Between Main And Auxiliary Circuit":"400 V","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","For Main Contacts For Ring Cable Lug":"2 ... 2.5 N·m","Surge Voltage Resistance Rated Value":"6 kV","Of The Auxiliary And Control Contacts":"M3","at AC in hot operating state per pole":"3.1 W","reference code according to IEC 81346-2":"Q","Number Of Poles For Main Current Circuit":"3","For Auxiliary Contacts For Ring Cable Lug":"1.2 ... 0.8 N·m","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","with high demand rate according to SN 31920":"50 %","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":"100 000","Size Of Contactor Can Be Combined Company-Specific":"S00, S0","Outer Diameter Of The Usable Ring Cable Lug Maximum":"7.5 mm","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":"208 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":"10 ... 16 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=453554&mlfb=3RV2021-4AA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4AA40/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV2021-4AA40?","answer":"Submit an RFQ through this listing. We source it to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3RV2021-4AA40?","answer":"The 3RV2021-4CA25 is a functional peer in the same SIRIUS family with the same 45 mm width and DIN rail mounting, but verify the trip current setting and breaking capacity match your BOM before substituting — the 4CA25 carries a different current rating range."},{"question":"What compliance documentation does Siemens provide for 3RV2021-4AA40?","answer":"Standard Siemens SIRIUS documentation includes the datasheet, operating instructions, and CE declaration of conformity. RoHS and REACH compliance are typically covered under the manufacturer's general product compliance declarations — confirm with your Siemens contact for specific certificate copies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4AA40","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/3RV2021-4AA40 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}}