{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6250-1BB33","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6250-1BB33","canonicalUrl":"https://aoctrl.com/siemens/3RA6250-1BB33","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6250-1BB33","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA6250-1BB33 compact reversing starter, 53 kA at 400 V, adjustable Trip Class 10 and 20, 24 V AC/DC coil, 90 x 170 x 165 mm, DIN rail mount.","salesMarkdown":"The 3RA6250-1BB33: That figure sets the short-circuit current rating (SCCR) for the motor branch circuit — downstream components must be coordinated to this level, or the starter itself clears the fault without upstream breaker intervention. Trip Class is adjustable between CLASS 10 and CLASS 20. CLASS 10 trips faster on overload, protecting motors with short thermal time constants (e.g., submersible pumps); CLASS 20 allows longer inrush for high-inertia loads like fans or centrifuges. The same starter covers both without a heater swap. That universal control voltage simplifies panel wiring — one control transformer covers the whole cabinet, and the DC rating means it works on battery-backed safety circuits. ## DIN rail footprint and wire termination Mounts on standard 35 mm DIN rail via screw and snap-on fastening. Any mounting position is allowed, so it fits in tight sub-panels or vertical bus risers without derating. Dimensions are 90 mm wide, 170 mm high, 165 mm deep. That 90 mm width is three 18 mm modular units — plan for three adjacent pole spaces on the DIN rail. The dual-entry allows looping through the same terminal for daisy-chained control wiring without a separate jumper. Main circuit connection is plug-in without terminals — the power contacts are part of the base unit; the control module plugs onto it. That means you can replace the overload/control section without pulling the power wiring. ## Environmental and mechanical ruggedness Operating temperature range is -20 to +60 °C; storage and transport range is -55 to +80 °C. That covers unheated warehouses and truck-bed exposure in most climates. Shock resistance is 60 m/s² (6g) with 10 ms half-sine, 3 shocks per axis. Vibration withstand is 4–5.8 Hz at 15 mm displacement, then 5.8–500 Hz at 20 m/s² acceleration, 10 cycles per axis. These are machine-mounting ratings — the starter lives on a conveyor frame or pump skid, not just a back-panel. Power dissipation is 2.8 W AC maximum, 2.9 W DC maximum. In a sealed enclosure with multiple starters, that heat adds up — budget about 3 W per unit for thermal calculations. ## Lifecycle and sourcing — current production, quoted to order Lifecycle status is current production. This is not an end-of-life or NRND part — Siemens continues to manufacture the 3RA6250-1BB33 as an active catalog item. The 6ES7517-3FP00-0AB0 and 6AG1215-1BG40-5XB0 listed as peers are Siemens PLC CPUs, not motor starters — they are not functional replacements and do not share the same mounting or wiring footprint. Sourced through independent distribution channels. No stock-holding claim is made; each order is quoted individually.","metaTitle":"Siemens 3RA6250-1BB33 SIRIUS Compact Reversing Starter","metaDescription":"Siemens 3RA6250-1BB33 SIRIUS compact reversing starter, 53 kA breaking capacity at 400 V, adjustable Trip Class 10/20, 24 V AC/DC coil, DIN rail mount.","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","title":"3RA6250-1BB33","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","description":"SIRIUS Compact load feeder Reversing starter 690 V 24 V AC/DC 50...60 Hz 0.32...1.25 A IP20 Connection main circuit: plug-in, without terminals Connection control circuit: screw terminal","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":"plug-in without 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":"$411.48","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/184e693a9bc558f051a007aeb34d5f87.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=161269&mlfb=3RA6250-1BB33"},"ai":{"faq":[{"question":"What is the breaking capacity of the 3RA6250-1BB33 at 400 V?","answer":"53 kA at 400 V. This is the short-circuit breaking capacity — the maximum fault current the starter can safely interrupt. It sets the SCCR for the motor branch circuit and determines upstream fuse or breaker coordination."},{"question":"What wire sizes does the 3RA6250-1BB33 accept?","answer":"The dual-entry terminals allow looping through for daisy-chained control wiring without separate jumpers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6250-1BB33","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/3RA6250-1BB33 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}