{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1421-1AA15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1421-1AA15","canonicalUrl":"https://aoctrl.com/siemens/3RV1421-1AA15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1421-1AA15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1421-1AA15 circuit breaker for transformer protection, 1.6 A continuous, 100 kA breaking capacity at 400 V AC, CLASS 10 trip, IP20 front, screw terminals, 45 mm wide.","salesMarkdown":"Rated at 1.6 A continuous current and 690 V insulation voltage, it breaks up to 100 kA at 400 V AC, which is enough to clear a bolted fault on the secondary side of a distribution transformer without the arc re-striking. The CLASS 10 trip curve means it will hold through a transformer's magnetizing inrush (typically 8–12× FLA for 0.1 s) but still trip fast enough to protect the winding from a sustained overload. The 45 mm width and 97 mm height fit a standard 8-module enclosure row; depth of 96 mm means it clears a 100 mm deep gland plate with a few mm to spare. Screw terminals on the main circuit accept solid conductors up to 2x 2.5 mm² or stranded up to 2x 6 mm², which is adequate for the 1.6 A rating but also leaves headroom if you need to parallel feeds. IP20 on the front — fine for a dry indoor panel; keep it out of washdown zones. The 100 kA breaking capacity holds across the full voltage range — 240 V, 400 V, 500 V, 690 V AC (–). That's a high-rupturing-capacity device, not a standard MCB; it is sized for installation close to a transformer secondary or a high-fault-capacity bus. The 1.6 A continuous rating and the transformer-protection design mean it is intended to protect a small control transformer (e.g., 250 VA at 400 V) or a similar inductive load with a high inrush-to-running ratio. No ground-fault detection — that is a separate device if you need it.","metaTitle":"Siemens 3RV1421-1AA15 SIRIUS Circuit Breaker, 1.6 A, 100 kA","metaDescription":"Siemens SIRIUS 3RV1421-1AA15 circuit breaker for transformer protection, 1.6 A continuous, 100 kA breaking capacity at 400 V AC, CLASS 10 trip, IP20 front. 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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"45 mm","Height":"97 mm","Maximum":"2 000 m","at 24 V":"1 A","at 60 V":"0.15 A","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","at 230 V":"0.5 A","Backwards":"0 mm","Trip class":"CLASS 10","At The Side":"0 mm","Rated Value":"690 V","On The Front":"IP20","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Shock resistance":"25g / 11 ms","Mounting position":"any","Product brand name":"SIRIUS","Product designation":"circuit breaker","at 400 V rated value":"1.6 A","Design of the product":"for transformer protection","For Auxiliary Contacts":"0","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","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"7.25 W","Continuous current rated value":"1.6 A","Design of the auxiliary switch":"transverse","at AWG conductors for main contacts":"2x (14 ... 10)","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (18 ... 14)","For Auxiliary And Control Current Circuit":"screw-type terminals","Removable Terminal For Auxiliary And Control Circuit":"No","Design of the overcurrent release and short-circuit release":"thermomagnetic","Arrangement of electrical connectors for main current circuit":"front side","Adjustable pick-up value current of the current-dependent overload release":"1.1 ... 1.6 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=32273&mlfb=3RV1421-1AA15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1421-1AA15/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 3RV1421-1AA15 at 400 V?","answer":"100 kA at 400 V AC. The same 100 kA rating applies at 240 V, 500 V, and 690 V AC."},{"question":"Where can I buy the 3RV1421-1AA15?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1421-1AA15","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/3RV1421-1AA15 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}}