{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1042-4MB10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1042-4MB10","canonicalUrl":"https://aoctrl.com/siemens/3RV1042-4MB10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4MB10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1042-4MB10, motor protection circuit breaker, 100 A, 45 kW at 400 V, 100 kA breaking capacity, Class 20, screw terminals, IP20 front, DIN rail mount.","salesMarkdown":"Rated voltage goes to 690 V AC (AC-3), with breaking capacity derating to 6 kA at that voltage. ## Trip class and protection features Trip Class 20 means the bimetal overload element allows a 7.2× cold-start current for up to 20 seconds before tripping — standard for general-purpose induction motors driving pumps, fans, and compressors. Ground fault detection is not included — if that is required, an external ground-fault module or a different SIRIUS variant is needed. Mounting position is any. Zero clearance required at the sides and rear — adjacent devices can be butted directly, saving rail space in a dense panel. The 70 mm width and 165 mm height fit a standard motor starter footprint; depth is 174 mm, which matters when the gland plate depth is tight. Screw-type box terminals on the main circuit accept solid 2x (2.5…16 mm²) or stranded 2x (10…50 mm²) / 1x (10…70 mm²). Auxiliary and control circuit terminals are also screw-type. An auxiliary switch can be added. Shock resistance rated at 25g / 11 ms. Substance prohibition date of 07/01/2006 aligns with RoHS compliance (lead, mercury, cadmium, etc. restricted).","metaTitle":"Siemens 3RV1042-4MB10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV1042-4MB10 SIRIUS motor protection circuit breaker, 100A continuous, 45 kW at 400V, 100 kA breaking capacity at 400V AC, Class 20 trip. Active 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":"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":"44 W","Substance Prohibitance (Date)":"07/01/2006","Continuous Current Rated Value":"100 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":"14.7 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":"100 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":"80 ... 100 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=51715&mlfb=3RV1042-4MB10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4MB10/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV1042-4MB10?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3RV1042-4MB10 at 400 V?","answer":"100 kA at 400 V AC. At 500 V it derates to 10 kA, and at 690 V to 6 kA."},{"question":"What is the continuous current rating of 3RV1042-4MB10?","answer":"100 A continuous rated current. Motor rating is 45 kW at 400 V."},{"question":"What is the trip class of 3RV1042-4MB10?","answer":"Trip Class 20, meaning the overload element allows a 7.2× cold-start current for up to 20 seconds before tripping."},{"question":"Does 3RV1042-4MB10 include phase failure detection?","answer":"Yes, phase failure detection is built in. Ground fault detection is not included."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1042-4MB10","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/3RV1042-4MB10 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}}