{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2025-2SB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2025-2SB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2025-2SB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2025-2SB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB2025-2SB0 soft starter, 24 V DC control supply, MODBUS TCP/IP, cULus, CE, IP20, 110 x 100 x 75 mm.","salesMarkdown":"That matters for panels with long DC runs or shared supplies where voltage drop eats into the headroom. It's rated for an I2t of 0.8 A²·s, which governs the thermal stress the device can handle during a start cycle; keep your motor's starting profile under that curve or you'll trip the overload before the motor gets up to speed. The part lives in an IP20 enclosure — fine for a clean control cabinet, but it won't survive washdown or outdoor dust.","metaTitle":"Siemens 3RB2025-2SB0 SIRIUS Soft Starter, 24 V DC, MODBUS TC","metaDescription":"Siemens 3RB2025-2SB0 SIRIUS soft starter with 24 V DC control, MODBUS TCP/IP, cULus & CE. Rated 0.8 A²·s I2t, -40 to 70°C. IP20. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"DCP":"Yes","FBD":"Yes","I2t":"0.8 A²·s","IRT":"No","LAD":"Yes","MRP":"No","SCL":"Yes","UDP":"Yes","24 V":"L+ minus 4 V DC min.","DHCP":"No","IP20":"Yes","LLDP":"Yes","MRPD":"No","Max.":"70 °C","Min.":"-40 °C","SNMP":"Yes","Depth":"75 mm","Width":"110 mm","cULus":"Yes","Height":"100 mm","MODBUS":"Yes","TCP/IP":"Yes","24 V DC":"Yes","CE mark":"Yes","Forcing":"Yes","Overall":"16; dynamically","Physics":"Ethernet","Present":"Yes","Voltage":"Yes","Isolated":"Yes","PROFIBUS":"Yes; CM 1243-5 (master) or CM 1242-5 (slave) required","As Client":"Yes","As Server":"Yes","ERROR LED":"Yes","MAINT LED":"Yes","Supported":"Yes","Variables":"Inputs/outputs, memory bits, DBs, distributed I/Os, timers, counters","0 to +10 V":"Yes","Adjustable":"Yes","Expandable":"No","Integrated":"4 Mbyte","S7 routing":"Yes","Web server":"Yes","Backup time":"480 h; Typical","FM approval":"Yes","KC approval":"Yes","PROFIenergy":"Yes","UL approval":"Yes","AS-Interface":"Yes; CM 1243-2 required","Autocrossing":"Yes","Number, max.":"8 kbyte; Size of bit memory address area","RUN/STOP LED":"Yes","2-Wire Sensor":"Yes","Shared device":"Yes","Updating time":"The minimum value of the update time also depends on the communication component set for PROFINET IO, on the number of IO devices and the quantity of configured user data.","For Signal \"0\"":"5 V DC at 1 mA","For Signal \"1\"":"15 V DC at 2.5 mA","Interface type":"PROFINET","PID controller":"Yes","Shielded, Max.":"100 m; twisted and shielded","Autonegotiation":"Yes","Copy protection":"Yes","Marine approval":"Yes","Number of ports":"1","Operation, max.":"95 %; no condensation","Operation, min.":"795 hPa","Parameterizable":"Single phase: 3 @ 100 kHz & 3 @ 30 kHz, differential: 3 @ 80 kHz & 3 @ 30 kHz","Weight, approx.":"435 g","Without Battery":"Yes","lifecycle_stage":"current","\"0\" To \"1\", Max.":"10 ms; max.","\"1\" To \"0\", Max.":"10 ms; max.","Block protection":"Yes","Firmware version":"V4.2","Isochronous mode":"No","Maintenance-Free":"Yes","Media redundancy":"No","Power loss, typ.":"12 W","Rated value (DC)":"24 V","Unshielded, Max.":"150 m","Data length, max.":"1 472 byte","Fall height, max.":"0.3 m; five times, in product package","Integrated Switch":"No","Source/sink input":"Yes","Inputs, adjustable":"1 kbyte","Number of counters":"6","On Lamp Load, Max.":"30 W with DC, 200 W with AC","PROFINET IO Device":"Yes","up to 40 °C, max.":"14","At \"0\" To \"1\", Max.":"12.8 ms","At \"0\" To \"1\", Min.":"0.2 ms","Outputs, adjustable":"1 kbyte","PG/OP communication":"Yes","Prioritized startup":"Yes","Programming package":"STEP 7 V14 or higher","Between The Channels":"No","ISO-on-TCP (RFC1006)":"Yes","Inrush current, max.":"12 A; at 28.8 V","Frequency measurement":"Yes","Open IE communication":"Yes","RCM (formerly C-TICK)":"Yes","SIMATIC communication":"Yes","User-defined websites":"Yes","Controlled Positioning":"Yes","Number of alarm inputs":"4","Of Which In Line, Max.":"16","PROFINET IO Controller":"Yes","Deviation per day, max.":"±60 s/month at 25 °C","Number of analog inputs":"2","Number of relay outputs":"10","Status/control variable":"Yes","Storage/transport, max.":"1 080 hPa","Storage/transport, min.":"660 hPa","Transmission rate, max.":"100 Mbit/s","User data per job, max.":"See online help (S7 communication, user data size)","For Bit Operations, Typ.":"0.08 µs; / instruction","Number of analog outputs":"0","Number of blocks (total)":"DBs, FCs, FBs, counters and timers. The maximum number of addressable blocks ranges from 1 to 65535. There is no restriction, the entire working memory can be used","Number of digital inputs":"14; Integrated","Current consumption, max.":"1 500 mA; CPU with all expansion modules","For Word Operations, Typ.":"1.7 µs; / instruction","Number of digital outputs":"10; Relays","With Resistive Load, Max.":"2 A","Hardware clock (real-time)":"Yes","Installation altitude, max.":"2 000 m","Installation altitude, min.":"-1 000 m","Memory size per trace, max.":"512 kbyte","Reverse polarity protection":"Yes","Vertical Installation, Max.":"50 °C","Vertical Installation, Min.":"-20 °C","Input resistance (0 to 10 V)":"≥100k ohms","Conversion time (per channel)":"625 µs","Horizontal Installation, Max.":"60 °C","Horizontal Installation, Min.":"-20 °C","Number of configurable Traces":"2","Number of operating cycles, max.":"mechanically 10 million, at rated load voltage 100 000","for backplane bus (5 V DC), max.":"1 600 mA; Max. 5 V DC for SM and CM","Counting frequency (counter) max.":"100 kHz","Current consumption (rated value)":"500 mA; CPU only","Integration time, parameterizable":"Yes","Supports protocol for PROFINET IO":"Yes","Between The Channels, In Groups Of":"2","Number of modules per system, max.":"3 comm. modules, 1 signal board, 8 signal modules","Protection level: Write protection":"Yes","tested according to IEC 60068-2-27":"Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms","For Floating Point Arithmetic, Typ.":"2.3 µs; / instruction","Plug-in (SIMATIC Memory Card), max.":"with SIMATIC memory card","Potential separation digital inputs":"500V AC for 1 minute","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","Potential separation digital outputs":"Relays","SO2 at RH < 60% without condensation":"S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free","Activation/deactivation of IO Devices":"Yes","Protection level: Complete protection":"Yes","Number of connectable IO Devices, max.":"16","Protection level: Read/write protection":"Yes","Automatic Detection Of Transmission Rate":"Yes","Limit class A, for use in industrial areas":"Yes; Group 1","Limit class B, for use in residential areas":"Yes; When appropriate measures are used to ensure compliance with the limits for Class B according to EN 55011","User program protection/password protection":"Yes","Operation, tested according to IEC 60068-2-6":"Yes","Number of connectable IO Devices for RT, max.":"16","Number of IO Controllers with shared device, max.":"2","Of Which Inputs Usable For Technological Functions":"6; HSC (High Speed Counting)","Number of IO devices with prioritized startup, max.":"16","Number of position-controlled positioning axes, max.":"8","Resolution with overrange (bit including sign), max.":"10 bit","Number of positioning axes via pulse-direction interface":"Up to 4 with SB 1222","Retentive data area (incl. timers, counters, flags), max.":"10 kbyte","Number of IO Devices that can be simultaneously activated/deactivated, max.":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=282749&mlfb=3RB2025-2SB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2025-2SB0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this part carry?","answer":"It carries cULus and CE mark approvals, which cover North American and European regulatory acceptance."},{"question":"What is the DCP and FBD support on this part?","answer":"DCP (Data Communication Processor) and FBD (Function Block Diagram) are both supported, allowing onboard logic and direct Ethernet communication without a separate gateway."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2025-2SB0","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/3RB2025-2SB0 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}}