{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1042-4JA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1042-4JA10","canonicalUrl":"https://aoctrl.com/siemens/3RV1042-4JA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4JA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor-protection circuit breaker, 3RV1042-4JA10, 63 A continuous, CLASS 10, 30 kW at 400 V, screw terminals, DIN-rail mount.","salesMarkdown":"The Siemens 3RV1042-4JA10 is a SIRIUS motor-protection circuit breaker — a three-pole, screw-terminal device sized for 63 A continuous current and rated 30 kW at 400 V. It's built for the main current circuit of a motor branch, not a distribution feeder. Phase-failure detection is included, so a lost phase on the line side won't cook the winding while the motor tries to single-phase run. Ground-fault detection is not built in — that's a separate module if your circuit needs it. ## Breaking capacity — the real-world fault limit The interrupting rating drops with system voltage: 100 kA at 240 V and 400 V AC, then 15 kA at 500 V, and 7.5 kA at 690 V. Zero clearance needed at the back or sides — you can butt it against adjacent devices on the rail. Dimensions are 70 mm wide, 165 mm high, 174 mm deep. ## Terminal wiring capacity Main circuit terminals accept solid conductors 2x (2.5 to 16 mm²) and stranded 2x (10 to 50 mm²) or 1x (10 to 70 mm²). AWG equivalents for the main contacts are 2x (10 to 1) solid, 1x (10 to 2) stranded. Auxiliary and control circuit terminals are also screw-type. Finely stranded with core-end processing goes 2x (2.5 to 35 mm²) or 2.5 to 50 mm². That covers everything from a 4 mm² motor lead up to a 70 mm² feeder. ## Thermal behavior and operating limits Power dissipation in hot operating state is 34 W total, 11.3 W per pole. Shock resistance is 25 g for 11 ms. Maximum switching frequency in AC-3 duty is 15 operations per hour, so it's sized for motor starting cycles, not rapid jogging.","metaTitle":"Siemens 3RV1042-4JA10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV1042-4JA10 SIRIUS motor-protection circuit breaker, 63 A continuous, CLASS 10 trip, 100 kA at 400 V, screw terminals, DIN-rail mount. Current lifecycle stage. Sourced to","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 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","at 400 V rated value":"30 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":"15 kA","at AC at 690 V rated value":"7.5 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"34 W","Substance Prohibitance (Date)":"07/01/2006","Continuous Current Rated Value":"63 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":"11.3 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":"63 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":"45 ... 63 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=187953&mlfb=3RV1042-4JA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4JA10/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV1042-4JA10 at 400 V?","answer":"100 kA at 400 V AC. At 500 V it drops to 15 kA, and at 690 V to 7.5 kA."},{"question":"Will 3RV1042-4JA10 drop into a panel specified around 3RV6021-4DA10?","answer":"Both are SIRIUS motor-protection breakers on 35 mm DIN rail with zero side clearance, so the mechanical fit is the same. The 3RV1042-4JA10 is a 63 A CLASS 10 device; the 3RV6021-4DA10 is a different current class. Check the motor FLA against the 63 A continuous rating before swapping — the footprint is compatible, but the protection curve must match the load."},{"question":"What compliance documentation does Siemens provide for 3RV1042-4JA10?","answer":"RoHS compliance is dated July 1, 2006. The device carries a 690 V rated value and surge voltage resistance of 6 kV, consistent with IEC 60947-2 coordination. Standard Siemens declarations of conformity cover CE and UKCA for industrial control gear."},{"question":"Where can I buy 3RV1042-4JA10 and get current pricing?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1042-4JA10","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/3RV1042-4JA10 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}}