{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1HA10-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1HA10-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1HA10-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1HA10-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, circuit breaker for system protection, Size S0, 3RV2021-1HA10-0DA0, Trip Class 10, 100 kA SCCR at 400 V AC, 45 mm width, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## What this SIRIUS breaker does on the line The Siemens SIRIUS 3RV2021-1HA10-0DA0 is a circuit breaker designed for system protection — meaning it sits upstream of motor starters and contactors to limit fault energy, not to provide direct motor overload protection (that's what the matching 3RV20 overload relay does). The screw-type terminals accept up to 10 mm² stranded wire, so it's comfortable for panel feeders up to that size. At 690 V AC it still holds 6 kA, which covers most industrial motor branch circuits. The SCCR drops to 42 kA at 500 V, so if your panel is fed from a 480 V transformer secondary, you've still got a solid 42 kA of fault clearing. Trip Class 10 means the thermal bimetal trips within 10 seconds at 7.2× rated current — standard for standard-duty motor starting where the acceleration time is under 10 seconds. If you've got a high-inertia load (centrifuge, large fan) that takes longer to spin up, you'd want a Class 20 or 30 trip curve instead. This one is for the normal case. ## Mounting and fit — the panel-builder view Width is 45 mm, depth 97 mm, height 97 mm. That's a single 45 mm module on the DIN rail — same footprint as a standard miniature circuit breaker, but this is a full-size motor-protective device. So you can stack these tight side-to-side, but need breathing room vertically for arc chute venting. Screw terminals for the main circuit take M4 screws. The screwdriver shaft needs to be 5 to 6 mm diameter, Pozidriv size 2 tip. Wire capacity: 2 × (1 to 2.5 mm²) or 2 × (2.5 to 10 mm²) solid or stranded. That's enough for a 4 mm² or 6 mm² motor feeder in most cases. ## Operating conditions and ratings Rated operational voltage range is 20 to 690 V — covers everything from 24 V control circuits up to 690 V industrial mains. At 230 V it's rated for 1.5 kW motor power. The maximum switching frequency in AC-3 duty is 15 operations per hour, so it's not a high-cycling device; for frequent starts you'd need a contactor with a higher mechanical life. That's standard industrial range — fine for unheated enclosures in temperate climates, but if the panel sits in a 50 °C boiler room, derate the continuous current per the manufacturer's curve (not provided here, but standard practice).","metaTitle":"Siemens 3RV2021-1HA10-0DA0 SIRIUS Circuit Breaker, 100 kA at","metaDescription":"Siemens SIRIUS 3RV2021-1HA10-0DA0 circuit breaker for system protection. Size S0, Class 10 trip, 100 kA SCCR at 400 V AC. Active production, sourced to order. Request a quote.","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","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":"-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":"1.5 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 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":"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 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":"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":"8 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"8 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":"104 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":"5.5 ... 8 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=1421691&mlfb=3RV2021-1HA10-0DA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1HA10-0DA0/alternatives.json"},"ai":{"faq":[{"question":"Will 3RV2021-1HA10-0DA0 drop into a panel designed for 3RV2021-1GA15?","answer":"Both are Size S0 frames on 35 mm DIN rail with the same 45 mm width and screw-type terminals, so the mechanical fit is identical. The difference is in the trip curve and SCCR ratings — verify the 1GA15's specs against your fault current before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1HA10-0DA0","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/3RV2021-1HA10-0DA0 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}}