{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1042-4LB10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1042-4LB10","canonicalUrl":"https://aoctrl.com/siemens/3RV1042-4LB10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4LB10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1042-4LB10 motor protection circuit breaker, 90 A rated continuous current, Class 20 trip, 100 kA breaking capacity at 400 V AC, screw terminals, IP20 front, DIN rail mount.","salesMarkdown":"It snaps onto a 35 mm DIN rail per EN 50022 and accepts solid conductors up to 16 mm² (2x) or stranded up to 70 mm² (1x) via screw-type box terminals — common for panel builders wiring motor feeders. For BOM freeze or long-term planning, the active lifecycle means you can spec it into new designs without an obsolescence clock. If you need a documented second-source, the 3RV6021-4DA10 is a functional peer — same Class 20, similar breaking curve — but verify terminal lug fit before swapping. Zero clearance needed at sides or rear. IP20 on the front face keeps fingers out of live terminals; the enclosure is rated for panel interior use, not washdown. Screw terminals accept AWG 10–1 solid (2x) or AWG 10–2 stranded (1x) — match your existing lug kit. Rated 690 V maximum operating voltage, but the 45 kW motor rating is at 400 V — the typical European industrial supply. Phase-failure detection is built in; ground-fault detection is not, so pair with a separate ground-fault relay if needed. Switching frequency maxes at 15 operations per hour in AC-3 duty — fine for a pump or fan start once per cycle, not for a jogging application. Power dissipation is 38 W at full load (12.7 W per pole); account for that heat in a sealed enclosure. Surge voltage withstand is 6 kV, which covers most industrial mains transients without external MOVs.","metaTitle":"Siemens 3RV1042-4LB10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV1042-4LB10 SIRIUS motor protection circuit breaker, 90 A continuous, Class 20 trip, 100 kA breaking at 400 V. Active lifecycle, sourced to order. RFQ for volume.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"174 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","Height":"165 mm","Stranded":"2x (10 ... 50 mm²), 1x (10 ... 70 mm²)","Backwards":"0 mm","Trip Class":"CLASS 20","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","at 400 V rated value":"45 kW","Design Of The Product":"for motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals with box 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":"10 kA","at AC at 690 V rated value":"6 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"38 W","Substance Prohibitance (Date)":"07/01/2006","Continuous Current Rated Value":"90 A","at AWG cables for main contacts":"2x (10 ... 1), 1x (10 ... 2)","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":"12.7 W","Finely Stranded With Core End Processing":"2x (2.5 ... 35 mm²), 2.5 ... 50 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":"90 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":"50 000","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"70 ... 90 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=339113&mlfb=3RV1042-4LB10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4LB10/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation comes with 3RV1042-4LB10?","answer":"RoHS compliance date is July 1, 2006, and the part carries CE marking for the European market. UL and CSA listings are standard for SIRIUS breakers; request the specific certificate with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1042-4LB10","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/3RV1042-4LB10 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}}