{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2031-4UB15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2031-4UB15","canonicalUrl":"https://aoctrl.com/siemens/3RV2031-4UB15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2031-4UB15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2031-4UB15 motor protection circuit breaker, Trip Class 20, 30 kA breaking capacity at 400 V, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"Rated Trip Class 20, meaning it allows a motor to draw up to 20 times its full-load current for 20 seconds before tripping — appropriate for loads with moderate starting inertia like conveyors, pumps, and compressors. The breaker includes phase failure detection, which will trip if one phase is lost, preventing single-phasing damage to the motor. The voltage range spans 20 to 690 V, covering standard low-voltage motor circuits. Width is 55 mm, depth 149 mm, height 140 mm. The 55 mm width occupies three 18 mm modular spaces on a DIN rail — a standard footprint for this class of motor-protective device. Main contact terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire — sized for motor feeder cables up to 2.5 mm².","metaTitle":"Siemens 3RV2031-4UB15 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2031-4UB15 SIRIUS motor protection circuit breaker. Trip Class 20, 30 kA breaking capacity at 400 V, phase failure detection. DIN rail mount. Quoted to order against RFQ","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"149 mm","Width":"55 mm","Height":"140 mm","Upwards":"50 mm","at 24 V":"1 A","at 60 V":"0.15 A","at 110 V":"0 A","at 125 V":"0 A","at 220 V":"0 A","at 230 V":"0.5 A","at 240 V":"none required","at 400 V":"125","at 500 V":"100","at 690 V":"80","Downwards":"50 mm","Trip Class":"CLASS 20","At The Side":"10 mm","Rated Value":"20 ... 690 V","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 standard mounting rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","For Main Contacts":"M6","Mounting Position":"any","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"7.5 hp","at 240 V rated value":"100 kA","at 400 V rated value":"30 kA","at 480 V rated value":"40 A","at 500 V rated value":"5 kA","at 600 V rated value":"40 A","at 690 V rated value":"2 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":"3 hp","at 200/208 V rated value":"15 hp","at 220/230 V rated value":"15 hp","at 460/480 V rated value":"30 hp","at 575/600 V rated value":"40 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"65 kA","at AC at 500 V rated value":"10 kA","at AC at 690 V rated value":"4 kA","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Circuit-Breaker":"S2","Size Of The Screwdriver Tip":"Pozidriv size 2","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"50 000","at AC in hot operating state":"20 W","at AC-3 at 400 V rated value":"40 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"50 000","Substance Prohibitance (Date)":"10/15/2014","at AC-3e at 400 V rated value":"40 A","Design Of The Auxiliary Switch":"transverse","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"40 A","at AWG cables for main contacts":"2x (18 ... 3), 1x (18 ... 2)","Design Of The Short-Circuit Trip":"magnetic","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Of The Auxiliary And Control Contacts":"M3","at AC in hot operating state per pole":"6.7 W","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","For Main Contacts With Screw-Type Terminals":"3 ... 4.5 N·m","with high demand rate according to SN 31920":"50 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","shock resistance according to IEC 60068-2-27":"25g / 11 ms Sinus","Electrical Endurance (Switching Cycles) Typical":"50 000","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","Size Of Contactor Can Be Combined Company-Specific":"S2","contact rating of auxiliary contacts according to UL":"C300 / R300","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gG: 10 A, miniature circuit breaker C 6 A (short-circuit current Ik < 400 A)","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"585 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"32 ... 40 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4ac59e9ee2ba9ac36caaae3b52a6bf06.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=402024&mlfb=3RV2031-4UB15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2031-4UB15/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV2031-4UB15 at 400 V?","answer":"30 kA at 400 V AC, which is the rating that determines its suitability for installation in panels with available fault current up to that level."},{"question":"Will 3RV2031-4UB15 drop into a panel specified around 3RV2021-4NA25 without rewiring?","answer":"Both are 55 mm wide SIRIUS motor protection breakers on the same DIN-rail footprint, so the mechanical fit is the same. The 3RV2031-4UB15 carries a higher 30 kA breaking capacity at 400 V versus the 3RV2021-4NA25's lower rating — verify the available fault current at the panel before swapping. Terminal wire sizes are identical."},{"question":"What compliance documentation does Siemens provide for 3RV2031-4UB15?","answer":"The product carries the SIRIUS brand and is designed to meet IEC/EN 60947-2 and 60947-4-1 standards for circuit breakers and motor starters. RoHS and REACH declarations are available from Siemens documentation. Specific UL/CSA file numbers are not listed in this evidence set — confirm with the manufacturer for the exact certification markings on the unit."},{"question":"How do I get current pricing and availability for 3RV2031-4UB15?","answer":"Submit an RFQ through the distributor. Availability and current pricing are confirmed at quote time — no stock count or price figure is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2031-4UB15","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/3RV2031-4UB15 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}}