{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4EA15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4EA15","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4EA15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4EA15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2021-4EA15, 45 mm wide, Trip Class 10, 25 kA breaking capacity at 400 V, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"It combines thermal overload protection with magnetic short-circuit protection in a single 45 mm wide package that snaps onto standard 35 mm DIN rail per DIN EN 60715. The Trip Class 10 rating means it trips within 10 seconds at 7.2× the thermal setting — fast enough to protect standard induction motors during locked-rotor conditions without nuisance tripping on normal starts. Rated breaking capacity of 25 kA at 400 V AC and 100 kA at 240 V AC. At 690 V the capacity drops to 2 kA, so verify the available fault current if you're running a 690 V line. Clearance requirements: 50 mm upward and downward, 30 mm at the side. Main contact terminals accept M4 screws; the control circuit terminals accept 2× (0.5 to 1.5 mm²) solid or stranded, or 2× (0.75 to 2.5 mm²) — strip length per standard practice. The lifecycle stage is listed as current — meaning Siemens still lists this as an active catalog number with no announced end-of-life. That said, the SIRIUS 3RV2 series has been through several revision cycles, and while this code remains orderable, the supply chain for Siemens industrial components can tighten without notice. ## Environmental and operational limits Operates from -20 °C to +60 °C ambient; storage and transport range is -50 °C to +80 °C. Rated voltage range 20 to 690 V AC. No ground fault detection on this variant.","metaTitle":"Siemens 3RV2021-4EA15 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2021-4EA15 SIRIUS motor protection circuit breaker, 25 kA breaking capacity at 400 V, Trip Class 10, 45 mm wide, DIN rail mount. Current lifecycle stage. Sourced to orde","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":"97 mm","Upwards":"50 mm","at 24 V":"1 A","at 60 V":"0.15 A","Forwards":"0 mm","at 120 V":"0.5 A","at 125 V":"0.5 A","at 230 V":"0.5 A","at 400 V":"gL/gG 63 A","at 500 V":"gL/gG 63 A","at 690 V":"gL/gG 63 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 DIN rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","For Main Contacts":"M4","Mounting Position":"any","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"5 hp","at 240 V rated value":"100 kA","at 400 V rated value":"25 kA","at 480 V rated value":"32 A","at 500 V rated value":"5 kA","at 600 V rated value":"32 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":"screw-type terminals","at 110/120 V rated value":"2 hp","at 200/208 V rated value":"7.5 hp","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"20 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":"Pozidriv size 2","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"13.25 W","at AC-3 at 400 V rated value":"32 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"32 A","Design Of The Auxiliary Switch":"transverse","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"32 A","Design Of The Short-Circuit Trip":"magnetic","for AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"6 kV","Of The Auxiliary And Control Contacts":"M3","at AC in hot operating state per pole":"4.4 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","With Side-By-Side Mounting At The Side":"0 mm","reference code according to IEC 81346-2":"Q","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","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","with high demand rate according to SN 31920":"50 %","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","shock resistance according to IEC 60068-2-27":"25g / 11 ms","Electrical Endurance (Operating Cycles) Typical":"100 000","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","Size Of Contactor Can Be Combined Company-Specific":"S00, S0","contact rating of auxiliary contacts according to UL":"C300 / R300","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"Fuse gL/gG: 10 A, miniature circuit breaker C 6 A (short-circuit current Ik < 400 A)","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"400 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"27 ... 32 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$68.58","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=281113&mlfb=3RV2021-4EA15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4EA15/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV2021-4EA15?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and delivery window."},{"question":"What is the breaking capacity of 3RV2021-4EA15 at 400 V?","answer":"25 kA at 400 V AC. That's the rating that typically determines panel SCCR compliance in 400 V industrial installations."},{"question":"Will 3RV2021-4EA15 drop into a panel specified for 3RV2021-4NA25?","answer":"Both are 45 mm wide SIRIUS 3RV2 frame sizes that snap onto the same DIN rail, so the mechanical footprint and terminal layout are identical. The difference is in the trip curve and current range — verify the thermal setting range matches your motor FLA before swapping."},{"question":"What compliance documentation does Siemens provide for 3RV2021-4EA15?","answer":"Siemens typically provides CE, UL, CSA, and CCC declarations for the SIRIUS 3RV2 series, along with RoHS and REACH compliance statements. Specific certification markings should be verified against the unit nameplate or Siemens Industry Online Support."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4EA15","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/3RV2021-4EA15 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}}