{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6250-1BB32","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6250-1BB32","canonicalUrl":"https://aoctrl.com/siemens/3RA6250-1BB32","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6250-1BB32","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS compact reversing starter, 3RA6250-1BB32, 53 kA at 400 V, adjustable Trip Class 10/20, screw terminals, DIN-rail mount.","salesMarkdown":"The Siemens 3RA6250-1BB32 is a SIRIUS compact reversing starter — a single device combining a contactor and overload relay in a reversing configuration, sized for a 3-phase motor load up to 370 W at 400 V. Rated for continuous operation per IEC 60947-6-2, it handles motor reversing without external interlocking, with a short-circuit breaking capacity of 53 kA at 400 V — enough for high-fault-current panels where a standard 10 kA starter would need upstream fusing. The overload relay offers adjustable Trip Class 10 and 20, letting you tune the thermal trip curve to the motor's start profile: Class 10 for fast-starting pumps and fans, Class 20 for high-inertia loads like conveyors or crushers. At 90 mm wide, it occupies three 18 mm module spaces in the enclosure. Main power circuit uses screw-type terminals accepting solid conductors from 0.5 to 4 mm², or two conductors 0.5 to 2.5 mm² each — useful for daisy-chaining supply to multiple starters in a motor control center. Control voltage is 24 V AC/DC, with a rated coil power of 2.8 W AC and 2.9 W DC — low enough to be driven by a standard 24 VDC PLC output or a 24 VAC control transformer without derating the power supply. Depth of 165 mm and height of 170 mm mean it fits most standard 200 mm deep enclosures with clearance for wiring. The three LED indicators show status at a glance — useful for commissioning and troubleshooting without a meter. The 53 kA SCCR and adjustable trip class make it a drop-in replacement for older reversing starters in panels where fault current has been upgraded.","metaTitle":"Siemens 3RA6250-1BB32 SIRIUS Compact Reversing Starter, 53 k","metaDescription":"Siemens 3RA6250-1BB32 SIRIUS compact reversing starter. 53 kA SCCR at 400 V, adjustable Trip Class 10/20. For motor reversing up to 370 W. DIN-rail mount. Current production. RFQ f","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"90 mm","at DC":"24 ... 24 V","Height":"170 mm","at 400 V":"53 kA","at 50 Hz":"24 ... 24 V","at 60 Hz":"24 V","Trip Class":"CLASS 10 and 20 adjustable","Recommended":"vertical, on horizontal standard DIN rail","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","at AC maximum":"2.8 W","at DC maximum":"2.9 W","During Storage":"-55 ... +80 °C","number of LEDs":"3","Type Of Voltage":"AC/DC","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","IO-Link protocol":"No","Shock Resistance":"a=60 m/s2 (6g) with 10 ms per 3 shocks in all axes","Mounting Position":"any","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Type Of Assignment":"continous operation according to IEC 60947-6-2","Degree Of Pollution":"3","Product Designation":"compact starter","Vibration Resistance":"f= 4 ... 5.8 Hz, d= 15 mm; f= 5.8 ... 500 Hz, a= 20 m/s²; 10 cycles","at 400 V rated value":"370 W","at 480 V rated value":"1.25 A","at 50 Hz rated value":"24 V","at 500 V rated value":"3 kA","at 60 Hz rated value":"24 V","at 600 V rated value":"1.25 A","at 690 V rated value":"3 kA","AS-Interface protocol":"No","Design Of The Product":"reversing starter","For Main Current Circuit":"screw-type terminals","at 460/480 V rated value":"0.5 hp","at 575/600 V rated value":"0.5 hp","at AC at 400 V rated value":"1.25 A","NO-Load Switching Frequency":"3 600 1/h","Of The Main Contacts Typical":"10 000 000","at AC in hot operating state":"0.1 W","at AC-3 at 400 V rated value":"0.37 kW","Of Auxiliary Contacts Typical":"10 000 000","Substance Prohibitance (Date)":"05/01/2012","Insulation Voltage Rated Value":"690 V","at DC-13 at 6 A at 24 V typical":"30 000","at AC-15 at 6 A at 230 V typical":"200 000","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"screw-type terminals","Of The Signaling Contacts Typical":"10 000 000","Between Main And Auxiliary Circuit":"400 V","Design Of Short-Circuit Protection":"electromagnetic","Product Extension Auxiliary Switch":"Yes","Product Function Bus Communication":"No","Relative Humidity During Operation":"10 ... 90 %","Without Load Current Share Typical":"2.9 W","Surge Voltage Resistance Rated Value":"6 000 V","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Between Control And Auxiliary Circuit":"300 V","at AC in hot operating state per pole":"0.03 W","Between Auxiliary And Auxiliary Circuit":"250 V","due to burst according to IEC 61000-4-4":"4 kV main contacts, 2 kV auxiliary contacts","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"0.5 ... 2.5 mm², 2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Formula For Making Capacity Limit Current":"38.4 x Ie","Product Function Short Circuit Protection":"Yes","Supply voltage required Auxiliary voltage":"No","with low demand rate according to SN 31920":"40 %","Formula For Limit Current Breaking Capacity":"32 x Ie","at AC-41 according to IEC 60947-6-2 maximum":"750 1/h","at AC-43 according to IEC 60947-6-2 maximum":"250 1/h","with high demand rate according to SN 31920":"50 %","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"2","operating voltage at AC-3 rated value maximum":"690 V","electrostatic discharge according to IEC 61000-4-2":"8 kV","contact rating of auxiliary contacts according to UL":"contacts 21-22, 13-14, 43-44 Q600 / A600, contacts 77-78 R300 / B300, contacts 95-96-98 R300 / D300","Product Component Removable Terminal For Main Circuit":"Yes","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","product function control circuit interface with IO link":"No","conducted HF interference emissions according to CISPR11":"150 kHz ... 30 MHz Class A","field-bound HF interference emission according to CISPR11":"30 ... 1000 MHz Class A","operational current of auxiliary contacts at AC-12 maximum":"10 A","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Product Function Control Circuit Interface To Parallel Wiring":"Yes","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.32 ... 1.25 A","number of NO contacts of instantaneous short-circuit trip unit for signaling contact":"1","For Short-Circuit Protection Of The Signaling Switch Of The Overload Release Required":"4A gL/gG/400V","number of CO contacts of the current-dependent overload release for signaling contact":"1","For Short-Circuit Protection Of The Signaling Switch Of The Short-Circuit Release Required":"6A gL/gG/400V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,164.24","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a8684cc7fb0e62ef43ac5cc4bc9eeca5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=186688&mlfb=3RA6250-1BB32","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA6250-1BB32/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings I need to know for fit?","answer":"The motor power rating is 370 W at 400 V. Short-circuit breaking capacity is 53 kA at 400 V. The overload is adjustable between Trip Class 10 and 20. Control voltage is 24 V AC/DC. Mounts on standard 35 mm DIN rail, 90 mm wide."},{"question":"What wire sizes does the screw terminal accept?","answer":"Solid conductors from 0.5 to 4 mm², or two conductors from 0.5 to 2.5 mm² each, for the main power circuit."},{"question":"Can this replace an older reversing starter in a panel with higher fault current?","answer":"Yes, the 53 kA at 400 V SCCR is well above typical industrial panel ratings, so it can replace units rated 10 kA or 25 kA without upstream fuse upgrades, provided the motor power and control voltage match."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6250-1BB32","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/3RA6250-1BB32 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}}