{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2042-4KA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2042-4KA10","canonicalUrl":"https://aoctrl.com/siemens/3RV2042-4KA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2042-4KA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2042-4KA10, CLASS 10 trip, screw terminals, 100 kA interrupting capacity at 400 V AC.","salesMarkdown":"The 3RV2042-4KA10: Rated for CLASS 10 trip characteristics, this breaker provides fast overload protection for standard induction motors, clearing a stalled-rotor condition before the motor insulation reaches its thermal limit. That trip class is the one most commonly specified for general-purpose motor starting applications — conveyors, pumps, fans — where the acceleration time stays under about 10 seconds. Dimensions are 70 mm wide, 165 mm tall, 176 mm deep. The 176 mm depth is the full body depth including terminals — measure the enclosure depth before committing the panel layout. Terminal capacity on the main circuit accepts 2x (2.5 to 16 mm²) solid or stranded, with a larger single-conductor range of 10 to 70 mm². That covers most motor feeder cables up to about 95 A copper, but note the 75 A continuous rating at 480 V and 600 V — the terminals are not the limiting factor here. ## Motor ratings and protection features Ground fault detection is not included; if ground-fault protection is required, pair this breaker with a separate ground-fault relay or use a SIRIUS 3RV2 with the GF option. Horsepower ratings span the typical 230 V to 600 V motor range: 15 hp at 230 V, 30 hp at 220/230 V, 60 hp at 460/480 V, and 75 hp at 575/600 V. These are the NEMA-equivalent ratings for the breaker's thermal-magnetic trip curve — useful when replacing a NEMA-style starter with an IEC SIRIUS solution. The wide storage range means the part can sit in a spare-parts cabinet in an unheated warehouse without issue.","metaTitle":"Siemens 3RV2042-4KA10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2042-4KA10 SIRIUS motor protection circuit breaker, CLASS 10 trip, 100 kA at 400 V AC. Current lifecycle stage. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"176 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","title":"3RV2042-4KA10","Height":"165 mm","Upwards":"150 mm","Downwards":"150 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"20 ... 690 V","description":"Circuit breaker size S3 for motor protection, CLASS 10 A-release 57...75 A N-release 975 A screw terminal Increased switching capacity 100 kA","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","Mounting Position":"any","Solid Or Stranded":"2x (2,5 ... 50 mm²), 1x (10 ... 70 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"15 hp","at 240 V rated value":"100 kA","at 400 V rated value":"50 kA","at 480 V rated value":"75 A","at 500 V rated value":"5 kA","at 600 V rated value":"75 A","at 690 V rated value":"3 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"7.5 hp","at 200/208 V rated value":"25 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"60 hp","at 575/600 V rated value":"75 hp","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","Size Of The Circuit-Breaker":"S3","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"25 000","at AC in hot operating state":"38 W","at AC-3 at 400 V rated value":"75 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"25 000","Substance Prohibitance (Date)":"03/01/2017","at AC-3e at 400 V rated value":"75 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"75 A","Design Of The Short-Circuit Trip":"magnetic","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","For Main Contacts For Ring Cable Lug":"4.5 ... 6 N·m","Surge Voltage Resistance Rated Value":"8 kV","at AC in hot operating state per pole":"12.7 W","With Side-By-Side Mounting At The Side":"0 mm","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (2.5 ... 35 mm²), 1x (2.5 ... 50 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 %","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²), 1x (10 ... 50 mm²)","For Main Contacts With Screw-Type Terminals":"4.5 ... 6 N·m","with high demand rate according to SN 31920":"50 %","shock resistance according to IEC 60068-2-27":"25g / 11 ms Sinus","Electrical Endurance (Operating Cycles) Typical":"25 000","Size Of Contactor Can Be Combined Company-Specific":"S3","Outer Diameter Of The Usable Ring Cable Lug Maximum":"19 mm","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"975 A","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"57 ... 75 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7f7aca5ea19d99e6e6b7770a617768df.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629978&mlfb=3RV2042-4KA10"},"ai":{"faq":[{"question":"Where can I buy 3RV2042-4KA10?","answer":"This part is 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 3RV2042-4KA10 at 400 V?","answer":"The interrupting capacity is 100 kA at 400 V AC, which covers most industrial distribution panels without requiring upstream fuses."},{"question":"What trip class is 3RV2042-4KA10?","answer":"It is rated CLASS 10, meaning it clears a stalled-rotor condition within 10 seconds at 600% of the set current — suitable for standard motor starting profiles."},{"question":"Will 3RV2042-4KA10 drop into a panel specified for 3RV2142-4MA10?","answer":"Both are SIRIUS motor protection circuit breakers on the same DIN-rail footprint, so the physical mounting is identical. However, the 3RV2142-4MA10 is a different frame size with different interrupting ratings — verify the available fault current and terminal wire range before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2042-4KA10","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/3RV2042-4KA10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}