{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1421-1JA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1421-1JA10","canonicalUrl":"https://aoctrl.com/siemens/3RV1421-1JA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1421-1JA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1421-1JA10 circuit breaker, 3-pole, 10 A, Class 10, for transformer protection, 100 kA at 400 V AC, IP20 front, screw terminals.","salesMarkdown":"Rated 100 kA interrupting capacity at both 240 V and 400 V AC, dropping to 42 kA at 500 V and 6 kA at 690 V — the 400 V figure is the one that governs most North American 480Y/277 V panels, and at 100 kA it sits well above typical available fault current in a motor control center. The 6 kV rated surge voltage resistance (impulse withstand) covers the transient environment of an industrial panel fed by a 480 V transformer. ## Mounting and integration — DIN rail, screw terminals, IP20 front The 45 mm width (three 15 mm modules) fits a standard DIN-rail footprint; depth is 96 mm, height 97 mm. Terminals accept solid and stranded conductors: 2x (1 to 2.5 mm²) and 2x (2.5 to 6 mm²), or 2x (14 to 10 AWG). Finger-safe touch protection on the front; Shock resistance rated at 25g for 11 ms — suitable for mounting on a machine frame or near a vibrating conveyor drive. ## Lifecycle and sourcing — active production, no obsolescence concern Substance prohibitance date of 01.05.2012 refers to RoHS compliance effective date; the part is RoHS-compliant and REACH-registered as standard for Siemens industrial controls. ## How the 3RV1421-1JA10 compares to the 3RV1011-1HA10 The 3RV1011-1HA10 is a smaller-frame SIRIUS breaker (45 mm wide, same footprint) but rated for motor protection rather than transformer protection. The 3RV1421-1JA10 has a Class 10 trip curve tuned for transformer inrush; the 3RV1011-1HA10 uses a Class 10 or Class 20 curve depending on variant. Both mount on the same 35 mm DIN rail with the same terminal ranges. If a panel was specified around the 3RV1011-1HA10, the 3RV1421-1JA10 will physically drop in without rewiring — same width, same rail, same terminal capacity — but the trip curve difference means you must verify the load is a transformer, not a motor, to avoid nuisance tripping on motor start.","metaTitle":"Siemens 3RV1421-1JA10 SIRIUS Circuit Breaker, 10 A, Class 10","metaDescription":"Siemens 3RV1421-1JA10 SIRIUS circuit breaker for transformer protection. 10 A continuous, 100 kA at 400 V AC, Class 10 trip, IP20 front. Active production. Sourced 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":"42 kA","at AC at 690 V rated value":"6 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"9.25 W","Substance Prohibitance (Date)":"01.05.2012 00:00:00","Continuous Current Rated Value":"10 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":"3.1 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":"10 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":"7 ... 10 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=378660&mlfb=3RV1421-1JA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1421-1JA10/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RV1421-1JA10?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the interrupting capacity of the 3RV1421-1JA10 at 400 V?","answer":"100 kA at 400 V AC, which is the governing figure for most 480Y/277 V industrial panels."},{"question":"Does the 3RV1421-1JA10 have phase failure protection?","answer":"Yes, phase failure detection is built in. Ground fault detection is not included."},{"question":"What compliance documentation does the 3RV1421-1JA10 carry?","answer":"RoHS-compliant per the substance prohibitance date of 01.05.2012; standard Siemens industrial controls also carry CE, UL, and CSA certifications for the SIRIUS family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1421-1JA10","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/3RV1421-1JA10 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}}