{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4FA10-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4FA10-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4FA10-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4FA10-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2021-4FA10-ZX95, CLASS 10 trip, 10 kA SCCR at 400 V, 45 mm wide, screw and snap-on DIN rail mount.","salesMarkdown":"The Siemens 3RV2021-4FA10-ZX95 is a SIRIUS motor-protection circuit breaker designed for motor loads. It combines a CLASS 10 thermal-magnetic trip curve with phase failure detection, so it catches a lost phase before the winding temperature climbs — the operator will find the bug at 2 a.m. if you skip that protection. Terminal screws for main contacts are M4; wire range 2x 1–2.5 mm² solid or stranded, or 2x 2.5–10 mm². Clearance: 70 mm above and below, 30 mm at the sides, zero forward or backward. Mount in any position.","metaTitle":"Siemens 3RV2021-4FA10-ZX95 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens 3RV2021-4FA10-ZX95 SIRIUS motor protection circuit breaker. CLASS 10 trip, 10 kA SCCR at 400 V, phase failure detection. 45 mm wide, DIN rail mount. Available to order.","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":"70 mm","Forwards":"0 mm","at 400 V":"gG 63 A","at 500 V":"gG 63 A","at 690 V":"gG 63 A","Backwards":"0 mm","Downwards":"70 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 ... +40 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","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":"7.5 hp","at 240 V rated value":"100 kA","at 400 V rated value":"10 kA","at 480 V rated value":"40 A","at 500 V rated value":"3 kA","at 600 V rated value":"40 A","at 690 V rated value":"2 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"3 hp","at 200/208 V rated value":"10 hp","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"30 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"20 kA","at AC at 500 V rated value":"6 kA","at AC at 690 V rated value":"3 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":"16.25 W","at AC-3 at 400 V rated value":"40 A","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"03/01/2017","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"40 A","Design Of The Short-Circuit Trip":"magnetic","for AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","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":"5.4 W","With Side-By-Side Mounting At The Side":"9 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":"480 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":"34 ... 40 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=357174&mlfb=3RV2021-4FA10-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4FA10-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RV2021-4FA10-ZX95 and how is it quoted for volume purchases?","answer":"This part is sourced through independent distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for volume or BOM-line requirements."},{"question":"Will 3RV2021-4FA10-ZX95 drop into a panel specified around 3RV2023-4DA10 without rewiring?","answer":"Both share the SIRIUS 3RV2 family footprint — same 45 mm width and DIN-rail mounting — so the panel cutout and rail position are compatible. However, the 3RV2023-4DA10 carries different trip ratings and SCCR values; verify your motor FLA and available fault current against this unit's 10 kA at 400 V before swapping."},{"question":"What is 3RV2021-4FA10-ZX95's listed depth?","answer":"Depth is 97 mm. Combined with 45 mm width and 97 mm height, it's a compact cube for DIN-rail panels."},{"question":"What compliance documentation does this brand provide?","answer":"As a Siemens SIRIUS component, it typically carries UL, CSA, CE, and IEC certifications for motor-protection circuit breakers. Specific documentation (RoHS, REACH, UL, IEC) is available upon request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4FA10-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/3RV2021-4FA10-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}}