{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4AA10-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4AA10-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4AA10-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4AA10-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV2021-4AA10-0DA0, size S0, for system protection, 4 kW at 230 V, 25 kA at 400 V, Class 10 trip, screw and snap-on DIN rail mount.","salesMarkdown":"## What this breaker does in a panel Rated 4 kW at 230 V, it handles small-to-medium motor loads common on conveyor and pump circuits. At 400 V, the 3RV2021-4AA10-0DA0 delivers 25 kA breaking capacity (55 kA under AC conditions at 400 V), which gives enough headroom for most industrial panel SCCR requirements. The gG fuse backup ratings — 63 A at 400 V, 50 A at 500 V, 40 A at 690 V — tell you the maximum upstream fuse that preserves selectivity; exceed those and the breaker may not clear a fault before the fuse blows. The S0 frame size (97 mm height, 45 mm width, 97 mm depth) is the standard footprint for this class; clearance requirements are 50 mm upwards and downwards, 30 mm to the side, and zero forwards or backwards — so it can sit flush against the backplane. Main contact terminals accept 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded wire, terminated with M4 screws.","metaTitle":"Siemens 3RV2021-4AA10-0DA0 SIRIUS Circuit Breaker, 25 kA at","metaDescription":"Siemens SIRIUS 3RV2021-4AA10-0DA0 circuit breaker, size S0, 4 kW at 230 V, 25 kA breaking capacity at 400 V, Class 10 trip, screw and snap-on DIN rail mount. Available 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","title":"3RV2021-4AA10-0DA0","Height":"97 mm","Upwards":"50 mm","Forwards":"0 mm","at 400 V":"gG 63 A","at 500 V":"gG 50 A","at 690 V":"gG 40 A","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"20 ... 690 V","description":"Circuit breaker size S0 for system protection without phase failure protection A-release 10...16 A N-release 208 A screw terminal Standard switching capacity","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 (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"4 kW","at 240 V rated value":"100 kA","at 400 V rated value":"25 kA","at 500 V rated value":"5 kA","at 690 V rated value":"2 kA","Design Of The Product":"for system protection","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"screw-type terminals","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":"9.25 W","at AC-3 at 400 V rated value":"16 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":"16 A","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","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","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 (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 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":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"25g / 11 ms Sinus","Electrical Endurance (Operating Cycles) Typical":"100 000","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":"208 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":"10 ... 16 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=168540&mlfb=3RV2021-4AA10-0DA0"},"ai":{"faq":[{"question":"Who supplies 3RV2021-4AA10-0DA0 and how is it quoted for volume purchases?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."},{"question":"What is 3RV2021-4AA10-0DA0's listed depth (97 mm) on this component line?","answer":"The depth is 97 mm, matching the standard S0 frame size for this series."},{"question":"What is 3RV2021-4AA10-0DA0's listed width (45 mm) on this component line?","answer":"The width is 45 mm, which is the standard S0 frame width for this series."},{"question":"Will 3RV2021-4AA10-0DA0 drop into a panel that was specified around 3RV2023-4DA10 without rewiring?","answer":"Both are S0 frame size (same 45 mm width, 97 mm depth, 97 mm height) and mount on 35 mm DIN rail, so the physical footprint is identical. However, the 3RV2023-4DA10 has different breaking capacity and trip characteristics — check the nameplate ratings before swapping."},{"question":"What compliance documentation does this brand provide for 3RV2021-4AA10-0DA0 (RoHS, REACH, UL, IEC)?","answer":"As a Siemens SIRIUS product, it carries the usual industrial certifications (UL, CSA, CE, IEC) applicable to the series. Specific RoHS/REACH declarations are available from the manufacturer upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4AA10-0DA0","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/3RV2021-4AA10-0DA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}