{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1421-0DA15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1421-0DA15","canonicalUrl":"https://aoctrl.com/siemens/3RV1421-0DA15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1421-0DA15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, circuit breaker for transformer protection, order code 3RV1421-0DA15, 0.32 A continuous, CLASS 10, 100 kA breaking capacity, screw-type terminals, IP20 front, DIN rail mount.","salesMarkdown":"## What this SIRIUS breaker does on a transformer branch The continuous current rated value is 0.32 A, and the trip class is CLASS 10, so it clears a fault fast enough to protect the transformer windings without nuisance tripping on magnetizing inrush. Breaking capacity is a flat 100 kA across the board — at 240 V, 400 V, 500 V, and 690 V AC — which means this breaker can handle a hard fault on a high-capacity distribution panel without upstream coordination headaches. Rated impulse withstand voltage is 6 000 V. ## Footprint and mounting — fits a standard DIN rail slot Width is 45 mm, height 97 mm, depth 96 mm — a single 45 mm module on the DIN rail. Clearance: zero mm backwards and zero mm at the side — no extra air gap needed between adjacent devices on the rail. That keeps the panel fill factor tight. ## Termination and wiring — screw terminals, solid and stranded Solid wire: 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²). Stranded: 2x (1 to 2.5 mm²) and 2x (2.5 to 6 mm²). AWG for main contacts: 2x (14 to 10). Auxiliary and control circuit also screw-type, with a transverse auxiliary switch design. The product extension auxiliary switch is available — the breaker accepts an add-on block. ## Environmental and lifecycle — current production, IP20 front Substance prohibitance date is 01.05.2012 — the part complies with RoHS and REACH requirements effective that date. ## Auxiliary contact ratings — what the switch block handles The auxiliary switch is rated: 1 A at 24 V, 0.5 A at 230 V, and 0.15 A at 60 V. That covers typical PLC input or contactor coil signaling through the breaker's status contacts. Operating frequency at AC-3 is 15 operations per hour maximum — this is a protection device, not a cycled contactor.","metaTitle":"Siemens 3RV1421-0DA15 SIRIUS Circuit Breaker, 0.32 A, CLASS","metaDescription":"Siemens 3RV1421-0DA15 SIRIUS circuit breaker for transformer protection, 0.32 A continuous, CLASS 10 trip, 100 kA breaking capacity at 400 V. Current lifecycle. 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","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":"0.32 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":"0.32 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":"0.22 ... 0.32 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=369777&mlfb=3RV1421-0DA15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1421-0DA15/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV1421-0DA15?","answer":"Breaking capacity is 100 kA at 240 V, 400 V, 500 V, and 690 V AC — a flat 100 kA across all those voltage levels, so it clears hard faults on high-capacity distribution without upstream coordination issues."},{"question":"Will 3RV1421-0DA15 drop into a panel specified around 3RV1011-0GA10?","answer":"Both are 45 mm wide SIRIUS breakers that snap onto 35 mm DIN rail per DIN EN 50022, so the footprint is the same. However, 3RV1421-0DA15 is a transformer-protection variant with a 0.32 A continuous rating and CLASS 10 trip, while 3RV1011-0GA10 is a standard motor-protection breaker — verify the trip curve and continuous current match your load before swapping."},{"question":"How do I get current pricing and availability for 3RV1421-0DA15?","answer":"Pricing and availability are confirmed at quote time. Submit an RFQ through the storefront; the part is sourced and quoted to order through independent distribution."},{"question":"What is the depth of 3RV1421-0DA15?","answer":"Depth is 96 mm, width 45 mm, height 97 mm — a single 45 mm DIN-rail module with zero clearance needed at the sides or rear."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1421-0DA15","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/3RV1421-0DA15 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}}