{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6400-1CB43","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6400-1CB43","canonicalUrl":"https://aoctrl.com/siemens/3RA6400-1CB43","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6400-1CB43","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS compact starter for IO-Link, 3RA6400-1CB43, direct starter design, 4 A rated operational current at 400 V AC, 24 V DC control supply, adjustable trip class 10 and 20, 45 mm width, screw and snap-on mounting on DIN rail.","salesMarkdown":"The Siemens 3RA6400-1CB43 is a SIRIUS compact starter designed as a direct starter for IO-Link communication. The unit is rated for continuous operation per IEC 60947-6-2. Rated at 4 A at 400 V AC (AC-3 motor duty), it handles motors up to 1.5 kW at 400 V and 2 hp at 460/480 V. The control supply is 24 V DC, drawing a maximum power dissipation of 2.9 W. The coil holds in at 24 V nominal; the dropout threshold is not listed here but is typically below 18 V for this class. The part carries three LEDs for status indication, and the IO-Link interface runs at COM2 (38.4 kBaud), enabling parameter setting and diagnostics from a PLC or IO-Link master. ## Trip class and protection flexibility The overload relay section offers adjustable trip class 10 and 20. Class 10 is the standard for standard-start induction motors; Class 20 allows longer acceleration time for high-inertia loads like fans or centrifuges. No official replacement has been announced; the 3RA6400-1CB43 is the current generation of SIRIUS compact starter for IO-Link. ## Integration and environmental limits The 45 mm width means it occupies one standard module position. Shock resistance is 60 m/s² (6 g) for 10 ms, three shocks per axis; vibration resistance covers 4 to 5.8 Hz at 15 mm amplitude and 5.8 to 500 Hz at 20 m/s² for 10 cycles.","metaTitle":"Siemens 3RA6400-1CB43 SIRIUS Compact Starter, 4A, 24VDC","metaDescription":"Siemens 3RA6400-1CB43 SIRIUS compact starter for IO-Link. 4A rated at 400V AC, 53kA breaking capacity, 24VDC coil. Adjustable trip class 10/20.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"45 mm","at DC":"24 ... 24 V","title":"3RA6400-1CB43","Height":"170 mm","at 400 V":"53 kA","Trip Class":"CLASS 10 and 20 adjustable","Recommended":"vertical, on horizontal standard DIN rail","description":"SIRIUS Compact load feeder DOL starter for IO-Link 690 V 24 V DC 1...4 A IP20 Connection main circuit: plug-in, without terminals Connection control circuit: screw terminal","at DC maximum":"2.9 W","During Storage":"-55 ... +80 °C","number of LEDs":"3","Type Of Voltage":"DC","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","IO-Link protocol":"Yes","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 for IO-Link","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 500 V rated value":"3 kA","at 600 V rated value":"4 A","at 690 V rated value":"3 kA","AS-Interface protocol":"No","Design Of The Product":"direct starter","IO-Link transfer rate":"COM2 (38,4 kBaud)","For Main Current Circuit":"plug-in without 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":"screw-type terminals","Of The Signaling Contacts Typical":"10 000 000","Design Of Short-Circuit Protection":"electromagnetic","Product Extension Auxiliary Switch":"Yes","Product Function Bus Communication":"Yes","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)","at AC in hot operating state per pole":"0.33 W","due to burst according to IEC 61000-4-4":"4 kV main circuits, 2 kV auxiliary circuits, 2 kV IO-Link, 2 kV limit switches, 2 kV line hand-held device","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":"12 x Ie","Product Function Short Circuit Protection":"Yes","Supply voltage required Auxiliary voltage":"Yes","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":"0","operating voltage at AC-3 rated value maximum":"690 V","electrostatic discharge according to IEC 61000-4-2":"8 kV","Type Of Voltage Supply Via Input/Output Link Master":"No","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":"Yes","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":"No","Of The Address Range Of The Inputs With Cyclical Transfer Total":"2 byte","Of The Address Range Of The Outputs With Cyclical Transfer Total":"2 byte","Display Version As Status Display Of The Input/Output Link Device":"green/red dual LED","point-to-point cycle time between master and IO-Link device minimum":"2.5 ms","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":"0","number of CO contacts of the current-dependent overload release for signaling contact":"0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8c6a41319b17ee5de04d43d2801241ff.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=229304&mlfb=3RA6400-1CB43"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6400-1CB43","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/3RA6400-1CB43 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}}