{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2031-4SB15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2031-4SB15","canonicalUrl":"https://aoctrl.com/siemens/3RV2031-4SB15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2031-4SB15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2031-4SB15, CLASS 20 trip, 30 kA breaking capacity at 400 V, 55 mm wide, screw and snap-on 35 mm DIN rail.","salesMarkdown":"Rated for supply voltages from 20 to 690 V AC, it covers the common low-voltage motor circuits found across European and North American panels. The CLASS 20 trip curve means it allows a 20-second overload at 600% of the set current before tripping — a good match for standard induction motor starting profiles on pumps, fans, and compressors where the start isn't prolonged. The auxiliary contact ratings tell you what control voltage you can switch through the breaker's status contact: 1 A at 24 V DC, 0.15 A at 60 V DC, and 0.5 A at 230 V AC. That's enough to signal a PLC input or a contactor coil, but not to drive a large load directly — keep it as a status signal, not a power switch. Motor rating is 3 hp at 230 V, which gives a quick cross-check for North American motor sizing. For 400 V circuits, the breaker's own current setting range (not listed here but implied by the CLASS 20 and breaking capacity) will cover the typical 3 to 14 A motor full-load current band. Maximum operating rate is 15 switching cycles per hour under AC-3 duty (motor starting). That's fine for a conveyor or pump that cycles a few times per hour, but not for a rapid-reversing application like a stamping press or a crane hoist. Width is 55 mm. Depth is 149 mm, so check your enclosure depth before committing. Spacing requirements: 50 mm above and below for cooling, 10 mm to the side. Ignore the side clearance and you'll derate the trip curve — the breaker will nuisance-trip on a warm day. Main contact terminals accept M6 bolts or two conductors from 0.5 to 2.5 mm² solid or stranded. Strip length is 10-12 mm for M6 ring terminals.","metaTitle":"Siemens 3RV2031-4SB15 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2031-4SB15 SIRIUS motor protection circuit breaker, CLASS 20, 30 kA breaking capacity at 400 V, phase failure detection, 55 mm wide. Available to order.","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":"100","at 500 V":"80","at 690 V":"63","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 DIN 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":"3 hp","at 240 V rated value":"100 kA","at 400 V rated value":"30 kA","at 480 V rated value":"14 A","at 500 V rated value":"6 kA","at 600 V rated value":"14 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":"1.5 hp","at 200/208 V rated value":"5 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 hp","at 575/600 V rated value":"15 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":"12 kA","at AC at 690 V rated value":"5 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":"12.5 W","at AC-3 at 400 V rated value":"14 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":"14 A","Design Of The Auxiliary Switch":"transverse","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"14 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":"4.2 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 (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 (Operating 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":"208 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":"9.5 ... 14 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=724356&mlfb=3RV2031-4SB15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2031-4SB15/alternatives.json"},"ai":{"faq":[{"question":"Does 3RV2031-4SB15 detect phase failure?","answer":"Yes, phase failure detection is built in. It will trip on a lost phase to prevent single-phasing motor damage. Ground fault detection is not included on this variant."},{"question":"What are the mounting dimensions and clearances for 3RV2031-4SB15?","answer":"Width 55 mm, depth 149 mm, height 140 mm. Requires 50 mm clearance above and below for cooling, 10 mm to the side. Mounts on 35 mm DIN rail per DIN EN 60715, any orientation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2031-4SB15","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/3RV2031-4SB15 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}}