{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1JA25","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1JA25","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1JA25","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1JA25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2021-1JA25 motor protection circuit breaker, Trip Class 10, 100 kA breaking capacity at 400 V, 45 mm width, spring-loaded terminals.","salesMarkdown":"## Motor protection circuit breaker for panel integration The Siemens SIRIUS 3RV2021-1JA25 is a motor protection circuit breaker designed for the main current circuit, with a Trip Class 10 rating that means it will trip within 10 seconds at 7.2× the thermal setting — standard for protecting standard induction motors during start-up without nuisance tripping. The main circuit uses spring-loaded terminals accepting 2× (0.5 to 2.5 mm²) solid or stranded wire, so no screw torqueing required on the line and load connections. ## Breaking capacity and fault current coordination Rated breaking capacity hits 100 kA at 240 V and 400 V, dropping to 42 kA at 500 V and 4 kA at 690 V — the 100 kA figure at 400 V means it can safely interrupt high fault currents typical in industrial distribution without needing an upstream current-limiting fuse for most installations. No ground fault detection on this variant — if that's required, look at the 3RV2021-4CA25 or 4NA25 which carry that function. ## Dimensions and mounting clearances Required clearances around the breaker: 50 mm upwards and downwards, 30 mm at the sides, and 0 mm forwards and backwards — meaning it can be mounted flush against the back panel and enclosure door, but needs breathing space above and below for arc venting and heat dissipation. Mounting position is any orientation, so horizontal or vertical DIN rail mounting works without derating.","metaTitle":"Siemens 3RV2021-1JA25 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens SIRIUS 3RV2021-1JA25 motor protection circuit breaker. Trip Class 10, 100 kA breaking capacity at 400 V, 45 mm wide, spring-loaded terminals. Current lifecycle stage. Sourc","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":"119 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","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","Mounting Position":"any","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"1.5 hp","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"10 A","at 500 V rated value":"42 kA","at 600 V rated value":"10 A","at 690 V rated value":"4 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"0.5 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"5 hp","at 575/600 V rated value":"10 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":"42 kA","at AC at 690 V rated value":"6 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":"9.25 W","at AC-3 at 400 V rated value":"10 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":"10 A","Design Of The Auxiliary Switch":"transverse","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"10 A","at AWG cables for main contacts":"2x (18 ... 8)","Design Of The Short-Circuit Trip":"magnetic","For Auxiliary And Control Circuit":"spring-loaded 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","at AWG cables for auxiliary contacts":"2x (20 ... 14)","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 (0.5 ... 1.5 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","Finely Stranded Without Core End Processing":"2x (0.5 ... 1.5 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":"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","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":"130 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":"7 ... 10 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=276554&mlfb=3RV2021-1JA25","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1JA25/alternatives.json"},"ai":{"faq":[{"question":"What is 3RV2021-1JA25's listed depth?","answer":"The depth is 97 mm, measured from the DIN rail mounting surface to the front of the housing."},{"question":"What compliance documentation does Siemens provide for 3RV2021-1JA25?","answer":"As a SIRIUS product, it carries CE marking for the European market. Specific RoHS, REACH, and UL documentation should be available from Siemens' support portal or requested at quote time — the evidence does not list individual certs for this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1JA25","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/3RV2021-1JA25 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}}