{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1JA20-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1JA20-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1JA20-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1JA20-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, motor-protection circuit breaker, 3RV2021-1JA20-ZX95, Class 10, 45 mm wide, 100 kA SCCR at 400 V AC, screw and snap-on DIN-rail mounting.","salesMarkdown":"The Siemens 3RV2021-1JA20-ZX95 is a SIRIUS motor-protection circuit breaker with Class 10 trip, phase failure detection, and overload and short-circuit protection. At 690 V the SCCR drops to 4 kA — still adequate for most 690 V motor circuits, but coordination with upstream protection needs checking at that voltage. Depth is 97 mm from the rail face, so check the enclosure depth before committing the gland plate. Clearance requirements: 50 mm above and below, 30 mm to the sides, and zero forwards or backwards — so you can pack it against the back panel or a partition without derating. Main circuit terminals are spring-loaded, accepting up to 2× 10 mm² solid or stranded. That covers most motor feeds up to the 10 A rated current at 600 V. No torque driver needed for the spring clamps — just strip 8–10 mm and push in. ## How it compares to the 3RV2021-1GA25 The 3RV2021-1GA25 is a sibling in the same SIRIUS frame — same 45 mm width, same DIN-rail mount, same Class 10 trip. The difference is in the current setting range and the SCCR curve. The -1GA25 is rated for a different motor FLA band; the -1JA20-ZX95 covers a specific range that may or may not overlap. If you're swapping one for the other, verify the thermal setting range matches your motor nameplate. The physical footprint is identical, so no panel rework needed.","metaTitle":"Siemens 3RV2021-1JA20-ZX95 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens 3RV2021-1JA20-ZX95 SIRIUS motor-protection circuit breaker, Class 10 trip, 100 kA SCCR at 400 V. 45 mm wide, DIN-rail mount. Sourced to order against RFQ.","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","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 standard mounting rail according to DIN EN 60715","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 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","Temperature Compensation":"-20 ... +60 °C","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","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","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","Between Main And Auxiliary Circuit":"400 V","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","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":"130 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","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=79219&mlfb=3RV2021-1JA20-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1JA20-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Will 3RV2021-1JA20-ZX95 drop into a panel specified for 3RV2021-1GA25?","answer":"Yes — both share the same 45 mm width, DIN-rail mounting, and Class 10 trip. The physical footprint is identical, so no panel rework is needed. Verify the thermal setting range matches your motor FLA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1JA20-ZX95","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/3RV2021-1JA20-ZX95 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}}