{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-0HA20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-0HA20","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-0HA20","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-0HA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2021-0HA20, size S0, Class 10 trip, 100 kA breaking capacity at 400 V AC, phase failure detection, screw and snap-on DIN rail mount.","salesMarkdown":"It includes phase failure detection, which will trip the breaker if one phase is lost — critical for preventing single-phasing damage on a three-phase motor. The S0 frame size means it occupies a 45 mm width on the rail — two modules wide. Depth is 97 mm, which is standard for this class; check your gland plate clearance. The 100 kA breaking capacity at 400 V AC (and at 240 V, 500 V, 690 V) means this breaker can be used in high-fault-current panels without requiring upstream current-limiting fuses — it is self-protecting up to that SCCR. The Class 10 trip protects standard NEMA design B and IEC induction motors during start-up; if your motor has a longer acceleration time (high-inertia loads like fans or conveyors), you may need a Class 20 or 30 trip, but for most pump, compressor, and conveyor applications, Class 10 is correct.","metaTitle":"Siemens 3RV2021-0HA20 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2021-0HA20 SIRIUS motor protection circuit breaker, size S0, Class 10 trip, 100 kA breaking capacity at 400 V AC. Phase failure detection. Screw and snap-on DIN rail mou","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":"3RV2021-0HA20","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","description":"Circuit breaker size S0 for motor protection, CLASS 10 A-release 0.55...0.8 A N-release 10 A Spring-type 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 standard mounting rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"0.1 kW","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"0.8 A","at 500 V rated value":"100 kA","at 600 V rated value":"0.8 A","at 690 V rated value":"100 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"spring-loaded terminals","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":"100 kA","at AC at 690 V rated value":"100 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":"100 000","at AC in hot operating state":"7.25 W","at AC-3 at 400 V rated value":"0.8 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":"0.8 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"0.8 A","at AWG cables for main contacts":"2x (18 ... 8)","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":"2.4 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","with low demand rate according to SN 31920":"50 FIT","Finely Stranded Without Core End Processing":"2x (1 ... 6 mm²)","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","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":"10 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":"0.55 ... 0.8 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=471376&mlfb=3RV2021-0HA20"},"ai":{"faq":[{"question":"When sourcing 3RV2021-0HA20, what is the closest functional second-source — 3RV2011-0BA20?","answer":"The 3RV2011-0BA20 is a smaller frame size (S00) with a lower breaking capacity and different terminal arrangement. It will not drop into a panel wired for the S0 frame without rewiring the main power terminals and checking the DIN rail space. The 3RV2021-0HA20 is the correct S0-size replacement for any panel originally specified with a size S0 breaker."},{"question":"What is 3RV2021-0HA20's listed depth (97 mm) on this component line?","answer":"The depth is 97 mm. This is the dimension from the DIN rail mounting surface to the front of the breaker — standard for the S0 frame size. Verify gland plate depth clearance before panel layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-0HA20","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/3RV2021-0HA20 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}}