{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1421-0AA15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1421-0AA15","canonicalUrl":"https://aoctrl.com/siemens/3RV1421-0AA15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1421-0AA15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV1421-0AA15, for transformer protection, 0.16 A rated continuous current, 100 kA breaking capacity at 400 V AC, CLASS 10 trip, phase failure detection, screw terminals, 45 mm wide.","salesMarkdown":"The CLASS 10 trip characteristic matches the inrush profile of small control transformers, so nuisance tripping on energization is minimized. The 0.16 A continuous rating sets the maximum steady-state load without thermal trip. For a three-phase control transformer feeding a rectifier or multiple single-phase loads, this is a practical safeguard that a standard MCB won't give you. In a panel with a large upstream transformer or a stiff utility feed, that SCCR headroom keeps the breaker from becoming the weak link in the coordination study. Auxiliary contact ratings: 1 A at 24 V, 0.5 A at 230 V, 0.15 A at 60 V. These are the switching limits for the built-in auxiliary contacts — use them to signal the breaker's state to a PLC or annunciator. The 24 V rating covers the common control voltage in most panels; the 230 V rating lets you drive an indicator lamp directly without an interposing relay. Power loss of 5.5 W in hot operating state at AC. The 45 mm width occupies one standard modular unit, so it fits alongside MCBs and contactors in a conventional DIN-rail layout. Dimensions: 45 mm wide, 97 mm high, 96 mm deep. The 96 mm depth is the front-to-back footprint — verify clearance behind the DIN rail, especially if the panel has a back plate or a rear wiring duct. Wire cross-sections: solid 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²); stranded 2x (1...2.5 mm²) and 2x (2.5...6 mm²). AWG for main contacts: 2x (14...10). These cover the typical control wiring sizes — no need for ferrule adapters on stranded wire up to 2.5 mm². The storage range exceeds the operating range — that's the handling limit, not the running limit. Shock resistance 25g / 11 ms, adequate for most industrial machinery and conveyor applications. Substance prohibitance date 01.05.2012 — this is the RoHS compliance cutoff. The part meets the RoHS directive as of that date, so it's acceptable for EU-market equipment and for customers with RoHS procurement requirements.","metaTitle":"Siemens 3RV1421-0AA15 SIRIUS Circuit Breaker, Transformer Pr","metaDescription":"Siemens 3RV1421-0AA15 SIRIUS circuit breaker for transformer protection. Rated 0.16 A continuous, 100 kA breaking capacity at 400 V AC, CLASS 10 trip. Phase failure detection. Curr","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","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","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":"100 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"5.5 W","Substance Prohibitance (Date)":"01.05.2012","Continuous Current Rated Value":"0.16 A","Design Of The Auxiliary Switch":"transverse","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 AWG cables for auxiliary contacts":"2x (18 ... 14)","at AC in hot operating state per pole":"1.8 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","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":"0.16 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":"0.11 ... 0.16 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=436348&mlfb=3RV1421-0AA15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1421-0AA15/alternatives.json"},"ai":{"faq":[{"question":"What is 3RV1421-0AA15's listed depth?","answer":"The depth is 96 mm, which is the front-to-back footprint on the DIN rail."},{"question":"What wire sizes does 3RV1421-0AA15 accept?","answer":"Solid wire: 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²). Stranded wire: 2x (1...2.5 mm²) and 2x (2.5...6 mm²). AWG for main contacts: 2x (14...10)."},{"question":"What compliance documentation does this brand provide for 3RV1421-0AA15?","answer":"The part meets RoHS requirements with a substance prohibitance date of 01.05.2012. Standard Siemens documentation includes RoHS and REACH declarations; UL and IEC certifications are typical for the SIRIUS product family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1421-0AA15","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/3RV1421-0AA15 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}}