{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-0KA10-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-0KA10-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-0KA10-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0KA10-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1021-0KA10-ZX95, 1.25 A rated current, 100 kA breaking capacity at 400 V AC, Trip Class 10, 3-pole, screw-type terminals, DIN rail mount.","salesMarkdown":"## Motor protection circuit breaker, 1.25 A, 100 kA — SIRIUS 3RV1021-0KA10-ZX95 The Siemens 3RV1021-0KA10-ZX95 is a SIRIUS motor protection circuit breaker rated for 1.25 A continuous current with a 100 kA breaking capacity at 400 V AC — that means it can safely interrupt a fault current up to 100 kA without welding contacts or cascading upstream, which is the full short-circuit rating you'd expect from a motor branch circuit on a 400 V distribution panel. It detects phase failure but not ground fault, so pair it with a separate ground-fault relay if your application requires that. The 3-pole design covers three-phase motor circuits. ## Mounting and wiring — DIN rail, screw terminals, 96 mm deep Depth is 96 mm, width 45 mm, height 97 mm. Zero clearance needed at the back or sides, so you can pack it tight against other devices. Screw-type terminals on both main and auxiliary circuits accept solid or stranded wire: 2× (1…2.5 mm²) and 2× (2.5…6 mm²) per terminal. AWG equivalents: 2× (14…10) for the main contacts. ## Electrical ratings and operating conditions Rated insulation voltage 690 V. Breaking capacity is 100 kA across the board at 240 V, 400 V, 500 V, and 690 V AC (–) — that's consistent high-fault performance regardless of the supply voltage within that range. Maximum operating frequency in AC-3 duty is 15 operations per hour, so it's sized for motor starting duty, not high-speed cycling. Surge voltage resistance rated at 6 000 V. Shock resistance 25g / 11 ms. Mounting position any.","metaTitle":"Siemens 3RV1021-0KA10-ZX95 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV1021-0KA10-ZX95 motor protection circuit breaker, 1.25 A rated current, 100 kA breaking capacity at 400 V AC, Trip Class 10, 3-pole, screw terminals, DIN rail mou","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"96 mm","Solid":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Width":"45 mm","Height":"97 mm","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Backwards":"0 mm","Trip Class":"CLASS 10","At The Side":"0 mm","Rated Value":"690 V","During Storage":"-50 ... +80 °C","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 50022","Shock Resistance":"25g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"circuit breaker","at 400 V rated value":"0.37 kW","Design Of The Product":"for motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","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":"100 kA","at AC at 690 V rated value":"100 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"7.25 W","Substance Prohibitance (Date)":"01.05.2012","Continuous Current Rated Value":"1.25 A","at AWG cables for main contacts":"2x (14 ... 10)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","operating frequency at AC-3 maximum":"15 1/h","Surge Voltage Resistance Rated Value":"6 000 V","at AC in hot operating state per pole":"2.4 W","Finely Stranded With Core End Processing":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","operational current at AC-3 at 400 V rated value":"1.25 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Overcurrent Release And Short-Circuit Release":"thermomagnetic","Arrangement Of Electrical Connectors For Main Current Circuit":"front side","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Mechanical Service Life (Switching Cycles) Of The Main Contacts Typical":"100 000","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.9 ... 1.25 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=68608&mlfb=3RV1021-0KA10-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0KA10-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RV1021-0KA10-ZX95?","answer":"The closest functional peer is the 3RV1011-0HA10, which shares the same SIRIUS platform and 3-pole motor protection design. The key difference is the 3RV1011-0HA10 has a different rated current range — verify your motor's FLA against its rating before substituting. The 3RV2011-0AA10 is a different frame size and may not share the same DIN-rail footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-0KA10-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/3RV1021-0KA10-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}}