{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1308-0DA00-0CP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1308-0DA00-0CP0","canonicalUrl":"https://aoctrl.com/siemens/3RK1308-0DA00-0CP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1308-0DA00-0CP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC 3RK1308-0DA00-0CP0, fail-safe reversing starter, 4 via 3DI/LC module, 55 kA at 400 V, PROFINET, PROFIBUS DP, pluggable in BaseUnit.","salesMarkdown":"## Fail-safe reversing starter with PROFINET — 3RK1308-0DA00-0CP0 The Siemens 3RK1308-0DA00-0CP0 is a SIMATIC fail-safe reversing starter built for motor control in safety-related circuits. It integrates a 4 via 3DI/LC module, meaning four inputs are configurable as standard digital inputs or as a light-curtain/safety-mat interface, giving you flexible safety I/O without an extra slice. The part carries a 55 kA short-circuit current rating at 400 V and 500 V, so it can ride out a bolted fault upstream without the cabinet going dark — that's the SCCR the panel label needs. Communication is dual-protocol: PROFINET and PROFIBUS DP are both on board. That means it drops into either a modern PN line or a legacy DP segment without a gateway. The device is pluggable into a BaseUnit, so swapping a failed unit means pulling the module off the base — wiring stays put. That's a five-minute swap versus a re-termination job. ## Trip Class and thermal protection — adjustable, not fixed Trip Class is adjustable: CLASS OFF, 5, or 10. CLASS OFF means the overload function can be disabled for short-cycle applications where the motor is already protected downstream. CLASS 5 is for submersible pumps or compressors that need a fast trip to avoid winding damage; CLASS 10 is the standard motor start. The minimum load is 50 % of the smallest adjustable rated current, so you cannot run this below half its set point — that prevents nuisance tripping on lightly loaded motors. ON-delay is fixed at 35 ms; OFF-delay spans 35–50 ms. That window is tight enough for most reversing applications where you need a dead-time between forward and reverse to avoid a phase-to-phase short. The safe state is load circuit open — when the safety function triggers, the output contacts drop and the motor coasts. ## Mounting and environment — DIN-rail panel integration The module is 30 mm wide, 142 mm tall, 150 mm deep — a single-width slice on the DIN rail. Mounting position can be vertical or horizontal, but horizontal requires derating per the manual. Clearance above and below is 50 mm each for airflow and wiring access. Operating temperature is -25 to +60 °C with derating above 40 °C; storage and transport range is -40 to +70 °C. Shock rated at 6g / 11 ms; vibration at 15 mm up to 6 Hz, then 2g to 500 Hz. That covers most industrial cabinet environments — conveyor lines, pump skids, machine tools. ## Lifecycle and sourcing — active, quoted to order Lifecycle stage is current — Siemens still builds this order code. No end-of-life notice or successor part is documented.","metaTitle":"Siemens 3RK1308-0DA00-0CP0 SIMATIC Fail-Safe Reversing Start","metaDescription":"Siemens 3RK1308-0DA00-0CP0 SIMATIC fail-safe reversing starter. 55 kA SCCR at 400 V, PROFINET/DP, adjustable Trip Class. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Note":"4 via 3DI/LC module","Depth":"150 mm","Width":"30 mm","Height":"142 mm","Upwards":"50 mm","Downwards":"50 mm","B10d value":"10 100 000","Safe State":"Load circuit open","Trip Class":"CLASS OFF / 5 / 10 adjustable","Direct Start":"Yes","ON-delay time":"35 ms","Of The Inputs":"4 byte","During Storage":"-40 ... +70 °C","OFF-delay time":"35 ... 50 ms","Of The Outputs":"2 byte","Safety-Related":"1","lifecycle_stage":"current","During Operation":"-25 ... +60 °C; For derating see manual","During Transport":"-40 ... +70 °C","Fastening Method":"pluggable in BaseUnit","Minimum Load [%]":"50 %; from smallest adjustable rated current","Product Category":"Motor starter","Product Function":"Fail-safe reversing starter","Reverse Starting":"Yes","Shock Resistance":"6g / 11 ms","Mounting Position":"Vertical, horizontal (observe derating)","On-Site Operation":"Yes","PROFINET protocol":"Yes","at DC rated value":"24 V","Product Brand Name":"SIMATIC","Type Of Assignment":"1","Degree Of Pollution":"2","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","Product Designation":"Reversing starter","Overvoltage Category":"III","PROFIBUS DP protocol":"Yes","Vibration Resistance":"15 mm to 6 Hz; 2g to 500 Hz","at 400 V rated value":"55 kA","at 500 V rated value":"55 kA","for signal <1> at DC":"15 ... 30","at 40 °C rated value":"0.4 A","at 50 °C rated value":"0.4 A","at 55 °C rated value":"0.4 A","at 60 °C rated value":"0.4 A","with signal <0> at DC":"0 ... 5 V","For Main Energy Infeed":"Plug contact to Base Unit","Remote Firmware Update":"Yes","At Switching On Of Motor":"250 mA","Number Of Digital Inputs":"5","1 For Digital Input Signals":"Pluggable module - accessory","2 For Digital Input Signals":"Plug contact to Base Unit","Intrinsic Device Protection":"Yes","Operating Frequency Maximum":"1 1/s","inrush current peak at 24 V":"25 A; Observe the manual for group configuration","For Supply Voltage Line-Side":"Plug contact to Base Unit","In Standby Mode Of Operation":"95 mA","Type Of Input Characteristic":"Type 1 in accordance with EN 61131-2","Type Of The Motor Protection":"solid-state","For Load-Side Outgoing Feeder":"Plug contact to Base Unit","Operating Voltage Rated Value":"48 ... 500 V","Substance Prohibitance (Date)":"04/15/2016","supports PROFIenergy shutdown":"Yes","Ampacity When Starting Maximum":"4 A","Insulation Voltage Rated Value":"500 V","Design Of The Switching Contact":"Hybrid","supply voltage at DC rated value":"24 V","Operating Frequency 1 Rated Value":"50 Hz","Operating Frequency 2 Rated Value":"60 Hz","Between Main And Auxiliary Circuit":"500 V","Design Of Short-Circuit Protection":"fuse","Product Function Bus Communication":"Yes","Relative Humidity During Operation":"10 ... 95 %","air pressure according to SN 31205":"900 ... 1 060 hPa","Product Component Motor Brake Output":"No","Surge Voltage Resistance Rated Value":"6 kV","category according to EN ISO 13849-1":"4","supports PROFIenergy measured values":"Yes","EMC immunity according to IEC 60947-1":"Class A","Type Of Voltage Of The Supply Voltage":"DC","stop category according to EN 60204-1":"0","due to burst according to IEC 61000-4-4":"3 kV","duration of inrush current peak at 24 V":"0.145 ms","reference code according to IEC 81346-2":"Q","Number Of Poles For Main Current Circuit":"3","Wire Length For Motor Unshielded Maximum":"200 m","Product Function Short Circuit Protection":"Yes","in switching state ON with bypass circuit":"3.8 W","PFH according to IEC 61508 relating to SIL":"0.0000000036 1/h","at 500 V according to UL 60947 rated value":"100 kA","in switching state OFF with bypass circuit":"2.3 W","protocol is supported AS-Interface protocol":"No","safety device type according to IEC 61508-2":"Type B","For Power Supply Reverse Polarity Protection":"Yes","When Switched Off Via Control Inputs Maximum":"55 ms","When Switched Off Via Supply Voltage Maximum":"120 ms","equipment variant according to IEC 60947-4-2":"3","operational current at AC at 400 V rated value":"0.4 A","hardware fault tolerance according to IEC 61508":"1","EMC emitted interference according to IEC 60947-1":"class A","PFDavg with low demand rate according to IEC 61508":"0.00000041","electrostatic discharge according to IEC 61000-4-2":"8 kV air discharge","performance level (PL) according to EN ISO 13849-1":"e","Input Current At Digital Input For Signal <1> Typical":"0.009 A","Relative Negative Tolerance Of The Operating Frequency":"5 %","Relative Positive Tolerance Of The Operating Frequency":"5 %","Installation Altitude At Height Above Sea Level Maximum":"4 000 m; For derating see manual","Relative Symmetrical Tolerance Of The Operating Voltage":"10 %","conducted HF interference emissions according to CISPR11":"Class A for industrial environment","Relative Symmetrical Tolerance Of The Operating Frequency":"5 %","field-bound HF interference emission according to CISPR11":"Class A for industrial environment","Diagnostics Test Interval By Internal Test Function Maximum":"600 s","Type Of Electrical Connection Of The Communication Interface":"Plug contact to Base Unit","full-load current (FLA) for 3-phase AC motor at 480 V rated value":"0.4 A","operating voltage at AC at 60 Hz according to CSA and UL rated value":"480 V","Mechanical Service Life (Switching Cycles) Of The Main Contacts Typical":"30 000 000","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.1 ... 0.4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$273.05","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1389403&mlfb=3RK1308-0DA00-0CP0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1308-0DA00-0CP0/alternatives.json"},"ai":{"faq":[{"question":"What is the 4 via 3DI/LC module on this starter?","answer":"It means the module has four inputs that can be configured as standard digital inputs or as a light-curtain/safety-mat interface. That gives you flexible safety I/O without adding a separate safety relay or input slice."},{"question":"What Trip Classes does this starter support?","answer":"Trip Class is adjustable to CLASS OFF, 5, or 10. CLASS OFF disables overload protection; CLASS 5 is for fast-trip applications like submersible pumps; CLASS 10 is standard motor start."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1308-0DA00-0CP0","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/3RK1308-0DA00-0CP0 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}}