{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1421-1FA10-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1421-1FA10-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV1421-1FA10-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1421-1FA10-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker for transformer protection, 3RV1421-1FA10-ZX95, 5 A rated, Class 10, 100 kA breaking capacity at 400 V AC, screw terminals, IP20 front.","salesMarkdown":"Rated 5 A continuous with a Class 10 trip characteristic, it gives you a 10-second maximum trip time at 7.2× rated current, which is the standard for protecting motor and transformer circuits where the start-up transient is brief. The 100 kA breaking capacity holds at 240 V, 400 V, and 500 V AC, dropping to 6 kA at 690 V AC — that SCCR headroom means it can sit upstream of smaller branch protectors without needing a current-limiting fuse ahead of it, as long as the available fault current stays under those numbers. At 45 mm wide, it takes up a single modular slot, so it fits standard distribution boards and motor control centers without crowding. The IP20 front means it's finger-safe for touch protection, but it's intended for inside an enclosure, not washdown areas. ## Terminal and wiring Screw-type terminals on both the main and auxiliary circuits accept solid or stranded copper: 2× (1 … 2.5 mm²) and 2× (2.5 … 6 mm²), or 2× (14 … 10 AWG). That dual-range clamping lets you daisy-chain a feed-through conductor alongside the outgoing wire without needing a separate terminal block — a time-saver on the panel wireman's bench. The auxiliary switch option (product extension available) means you can wire a remote status signal back to a PLC input without an interposing relay.","metaTitle":"Siemens 3RV1421-1FA10-ZX95 SIRIUS Circuit Breaker, 5 A, Clas","metaDescription":"Siemens SIRIUS 3RV1421-1FA10-ZX95 circuit breaker for transformer protection. 5 A continuous, 100 kA breaking at 400 V, Class 10 trip, IP20. Active production. Quoted to order.","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","Design Of The Product":"for transformer 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":"6 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":"5 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":"5 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":"3.5 ... 5 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=443733&mlfb=3RV1421-1FA10-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1421-1FA10-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RV1421-1FA10-ZX95 and how is it quoted for volume purchases?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."},{"question":"What is 3RV1421-1FA10-ZX95's breaking capacity at 400 V?","answer":"It has a 100 kA breaking capacity at 400 V AC, which is the same rating it holds at 240 V and 500 V AC. At 690 V AC the rating drops to 6 kA."},{"question":"What compliance documentation does this part carry?","answer":"The RoHS compliance date is 01.05.2012, indicating it meets the EU RoHS substance restrictions. The front face carries IP20 finger-safe touch protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1421-1FA10-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/3RV1421-1FA10-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}}