{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2031-4JB15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2031-4JB15","canonicalUrl":"https://aoctrl.com/siemens/3RV2031-4JB15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2031-4JB15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2031-4JB15, CLASS 20, 30 kA breaking capacity at 400 V, 18.5 kW at 230 V, screw and snap-on mounting.","salesMarkdown":"It carries a CLASS 20 trip curve, meaning it allows a 20-second overload before tripping — sized for standard induction motor starting without nuisance trips on the inrush. Rated for 18.5 kW at 230 V and with a breaking capacity of 30 kA at 400 V, it handles the fault currents typical of industrial distribution panels. ## Ratings and Real-World Fit The motor power rating of 18.5 kW at 230 V matches a 25 hp motor roughly; at 400 V the rating is not directly given but the current settings (160 A at 400 V,) indicate the breaker's thermal-magnetic range. CLASS 20 is the standard for general-purpose induction motors — pumps, fans, compressors — not for high-inertia loads that need a longer trip class. Screw-type terminals for the main current circuit accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire. Mounting position any — no restriction, so it fits in horizontal or vertical DIN-rail layouts. The M6 main contact screws handle the lug size typical for this current class.","metaTitle":"Siemens 3RV2031-4JB15 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2031-4JB15 SIRIUS motor protection circuit breaker, CLASS 20, 30 kA breaking capacity at 400 V, 18.5 kW at 230 V. Phase failure detection, screw and snap-on DIN rail mou","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":"160","at 500 V":"125","at 690 V":"100","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","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":"18.5 kW","at 240 V rated value":"100 kA","at 400 V rated value":"30 kA","at 480 V rated value":"65 A","at 500 V rated value":"5 kA","at 600 V rated value":"62 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","Temperature Compensation":"-20 ... +60 °C","at 200/208 V rated value":"20 hp","at 220/230 V rated value":"25 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"60 hp","at AC at 240 V rated value":"65 kA","at AC at 400 V rated value":"65 kA","at AC at 500 V rated value":"8 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":"20 000","at AC in hot operating state":"26 W","at AC-3 at 400 V rated value":"65 A","Of Auxiliary Contacts Typical":"20 000","Substance Prohibitance (Date)":"04/10/2015","Design Of The Auxiliary Switch":"transverse","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"65 A","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 1)","Design Of The Short-Circuit Trip":"magnetic","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"400 V","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":"8.7 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":"20 000","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":"845 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"54 ... 65 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$143.51","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=723007&mlfb=3RV2031-4JB15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2031-4JB15/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV2031-4JB15 and how do I get a price?","answer":"The 3RV2031-4JB15 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ to receive a firm price and lead time."},{"question":"What is 3RV2031-4JB15's listed depth (149 mm) on this component line?","answer":"The depth is 149 mm. That is the dimension from the DIN-rail foot to the front of the breaker, including the handle and terminal covers. Width is 55 mm, height is 140 mm."},{"question":"Will 3RV2031-4JB15 drop into a panel that was specified around 3RV2021-4NA25 without rewiring?","answer":"The 3RV2031-4JB15 shares the same SIRIUS family footprint — 55 mm width and screw/snap-on DIN-rail mounting — so it fits mechanically. However, the terminal wire ranges and the current settings differ; verify the thermal-magnetic adjustment range matches your motor full-load current before ordering. The 3RV2021-4NA25 is a different variant with a different current rating; the 3RV2031-4JB15 is a higher-current frame."},{"question":"What compliance documentation does this brand provide for 3RV2031-4JB15 (RoHS, REACH, UL, IEC)?","answer":"The SIRIUS series from Siemens typically includes UL, CSA, CE, and CCC certifications. RoHS and REACH declarations are standard for current-production Siemens industrial components. Request the specific declaration of conformity or certificate from the supplier at quote time to match your project's compliance requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2031-4JB15","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/3RV2031-4JB15 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}}