{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6250-2CB34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6250-2CB34","canonicalUrl":"https://aoctrl.com/siemens/3RA6250-2CB34","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6250-2CB34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS compact reversing starter, 3RA6250-2CB34, 53 kA at 400 V, adjustable trip class 10/20, spring-loaded terminals, 191 x 90 x 165 mm.","salesMarkdown":"## Reversing starter for motor direction control The Siemens 3RA6250-2CB34 is a SIRIUS compact reversing starter — a single device that handles forward/reverse motor control without separate contactors and interlocks. It integrates the reversing contactor pair, overload relay, and short-circuit protection coordination into one 191 x 90 x 165 mm package that snaps onto standard DIN rail. Rated for continuous operation per IEC 60947-6-2, it delivers a 53 kA short-circuit current rating at 400 V — enough to coordinate with most upstream MCCBs or fuses in a distribution panel without cascading failure. The overload relay is adjustable between CLASS 10 and CLASS 20 trip curves. CLASS 10 trips in under 10 seconds at 7.2× FLC — suited for motors that accelerate quickly (pumps, fans). CLASS 20 allows up to 20 seconds, covering high-inertia loads like conveyors or centrifuges where start time exceeds 10 seconds. The same device covers both, so you set the class during commissioning without swapping the relay. The control circuit is AC/DC 24 V, 50/60 Hz, drawing 2.8 W AC or 2.9 W DC maximum, which keeps the thermal load on the enclosure low. Three onboard LEDs indicate status — run, fault, and network communication — so a technician can read the starter's state without opening the panel door or connecting a laptop. ## Panel environment and mounting The enclosure is pollution degree 3 rated — suitable for industrial environments where conductive dust or condensation is present. Operating temperature range is -20 to +60 °C; storage and transport range is -55 to +80 °C. Vibration resistance is tested to 4–5.8 Hz at 15 mm amplitude, then 5.8–500 Hz at 20 m/s² for 10 cycles. Shock resistance is 60 m/s² (6g) for 10 ms, three shocks per axis. These ratings confirm the starter holds its settings and connections in a panel mounted on a machine frame or near rotating equipment.","metaTitle":"Siemens 3RA6250-2CB34 SIRIUS Reversing Starter","metaDescription":"Siemens 3RA6250-2CB34 SIRIUS compact reversing starter, 53 kA SCCR at 400 V, adjustable trip class 10/20, spring-loaded terminals.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"90 mm","at DC":"24 ... 24 V","title":"3RA6250-2CB34","Height":"191 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 1...4 A IP20 Connection main circuit: Spring-type terminal Connection control circuit: plug-in, without terminals","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":"1 500 W","at 480 V rated value":"4 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":"4 A","at 690 V rated value":"3 kA","AS-Interface protocol":"No","Design Of The Product":"reversing starter","For Main Current Circuit":"spring-loaded terminals","at 200/208 V rated value":"0.75 hp","at 220/230 V rated value":"0.75 hp","at 460/480 V rated value":"2 hp","at 575/600 V rated value":"3 hp","at AC at 400 V rated value":"4 A","NO-Load Switching Frequency":"3 600 1/h","Of The Main Contacts Typical":"10 000 000","at AC in hot operating state":"1 W","at AC-3 at 400 V rated value":"1.5 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":"plug-in without 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","Between Control And Auxiliary Circuit":"300 V","at AC in hot operating state per pole":"0.33 W","for AWG cables for auxiliary contacts":"2x (24 ... 16)","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":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Formula For Making Capacity Limit Current":"12 x Ie","Product Function Short Circuit Protection":"Yes","Supply voltage required Auxiliary voltage":"No","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 1.5 mm²)","Formula For Limit Current Breaking Capacity":"10 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":"1 ... 4 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/298b2641a746bba2a89535c12e8caedc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=463843&mlfb=3RA6250-2CB34"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6250-2CB34","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/3RA6250-2CB34 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}}