{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2042-4HB10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2042-4HB10","canonicalUrl":"https://aoctrl.com/siemens/3RV2042-4HB10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2042-4HB10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2042-4HB10, motor protection circuit breaker, CLASS 20, screw terminals, 100 kA breaking capacity at 400 V AC, 176 x 70 x 165 mm, DIN rail mount.","salesMarkdown":"It carries a CLASS 20 trip curve, meaning it allows up to 20 seconds of locked-rotor current before tripping — matching the thermal time constant of standard NEMA design B motors during start-up. No ground-fault detection on this variant; if GF protection is needed, pair it with a separate ground-fault relay or choose a 3RV2 with the GF option. Motor horsepower coverage spans from 5 hp at 110/120 V up to 50 hp at 575/600 V. At 460/480 V it covers 40 hp; at 230 V it handles 20 hp. Use the full-load current setting range on the breaker dial — not the horsepower table — to set the actual trip point per the motor nameplate. ## Mounting and wiring — panel integration Main circuit terminals accept solid or stranded copper: 2x (2.5 … 16 mm²) on the line side and 2x (2.5 … 50 mm²) or 1x (10 … 70 mm²) on the load side. Screw-type terminals — torque to the manufacturer's spec stamped on the device. The 176 mm depth and 70 mm width mean it occupies a single 70 mm DIN-rail slot. ## Environmental and operating limits The storage limit governs handling, not running — the device can survive cold warehouse transit but must be within operating range before energizing. Rated insulation voltage is 20 … 690 V. Maximum switching frequency at AC-3 duty is 15 operations per hour — adequate for motor starting cycles but not for high-repetition jogging or inching applications.","metaTitle":"Siemens 3RV2042-4HB10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2042-4HB10 SIRIUS motor protection circuit breaker, CLASS 20, 100 kA SCCR at 400 V AC. Phase failure detection, DIN rail mount. Sourced to order; RFQ for availability an","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":"3RV2042-4HB10","Height":"165 mm","Upwards":"150 mm","Downwards":"150 mm","Trip Class":"CLASS 20","At The Side":"30 mm","Rated Value":"20 ... 690 V","description":"Circuit breaker size S3 for motor protection, Class 20 A-release 36...50 A N-release 650 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":"10 hp","at 240 V rated value":"100 kA","at 400 V rated value":"50 kA","at 480 V rated value":"50 A","at 500 V rated value":"7.5 kA","at 600 V rated value":"50 A","at 690 V rated value":"5 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":"5 hp","at 200/208 V rated value":"15 hp","at 220/230 V rated value":"20 hp","at 460/480 V rated value":"40 hp","at 575/600 V rated value":"50 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":"15 kA","at AC at 690 V rated value":"10 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":"27 W","at AC-3 at 400 V rated value":"50 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":"50 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"50 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":"9 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 (Switching 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":"650 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":"36 ... 50 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=629975&mlfb=3RV2042-4HB10"},"ai":{"faq":[{"question":"How do I get pricing and availability for the 3RV2042-4HB10?","answer":"The 3RV2042-4HB10 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote."},{"question":"What are the key ratings of the 3RV2042-4HB10?","answer":"CLASS 20 trip curve, 100 kA breaking capacity at 400 V AC, phase failure detection, and motor horsepower coverage from 5 hp at 110/120 V to 50 hp at 575/600 V. It mounts on 35 mm DIN rail and accepts wire up to 70 mm² on the load side."},{"question":"Will the 3RV2042-4HB10 drop into a panel specified around the 3RV2021-4NA25?","answer":"The 3RV2042-4HB10 is a larger frame size (70 mm wide vs the 3RV2021 family's 45 mm width). It will not fit the same DIN-rail footprint without panel modification. Verify the physical space and terminal wire range before substituting."},{"question":"What compliance documentation is available for the 3RV2042-4HB10?","answer":"As a Siemens SIRIUS product, the 3RV2042-4HB10 is manufactured under IEC/EN 60947-2 and 60947-4-1 standards. RoHS and REACH declarations are available from Siemens. Contact us with your RFQ to request specific compliance certificates."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2042-4HB10","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/3RV2042-4HB10 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}}