{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1CA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1CA10","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1CA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1CA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2021-1CA10 motor protection circuit breaker, CLASS 10, screw/snap-on 35 mm DIN rail, 100 kA SCCR at 400 V AC.","salesMarkdown":"The 3RV2021-1CA10: Its CLASS 10 trip class means it will trip within 10 seconds at 7.2× the thermal setting, which is the standard for protecting standard induction motors during start-up — it lets the motor accelerate without nuisance tripping on inrush. Main circuit terminals are M4 screw-type, accepting 2×(1…2.5 mm²) or 2×(2.5…10 mm²) solid or stranded copper. Keep the strip length clean to avoid stray strands under the screw head. Clearance: 50 mm above and below, 30 mm to the side, 0 mm forward or backward — so you can pack it tight front-to-back in a shallow enclosure. ## Short-circuit ratings — what they mean for coordination Rated short-circuit breaking capacity is 100 kA at 240 V, 400 V, and 500 V AC, dropping to 10 kA at 690 V AC. The 3RV2021-1CA10 is a drop-in replacement for panels designed around the SIRIUS 3RV2 family.","metaTitle":"Siemens 3RV2021-1CA10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2021-1CA10 SIRIUS motor protection circuit breaker, CLASS 10 trip, 100 kA SCCR at 400 V, screw and snap-on DIN rail mount. Current production.","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":"3RV2021-1CA10","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","description":"Circuit breaker size S0 for motor protection, CLASS 10 A-release 1.8...2.5 A N-release 33 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":"0.17 hp","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"2.5 A","at 500 V rated value":"100 kA","at 600 V rated value":"2.5 A","at 690 V rated value":"10 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","at 200/208 V rated value":"0.5 hp","at 220/230 V rated value":"0.5 hp","at 460/480 V rated value":"1 hp","at 575/600 V rated value":"1.5 hp","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":"10 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":"7.25 W","at AC-3 at 400 V rated value":"2.5 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":"2.5 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"2.5 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 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","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","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":"33 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":"1.8 ... 2.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$83.00","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=446407&mlfb=3RV2021-1CA10"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Width 45 mm, height 97 mm, depth 97 mm. Requires 50 mm clearance above and below, 30 mm to the side, and 0 mm forward/backward."},{"question":"Does it detect phase failure?","answer":"Yes, phase failure detection is included."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1CA10","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/3RV2021-1CA10 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}}