{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1308-0AE00-0CP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1308-0AE00-0CP0","canonicalUrl":"https://aoctrl.com/siemens/3RK1308-0AE00-0CP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1308-0AE00-0CP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC 3RK1308-0AE00-0CP0 direct-on-line motor starter, 12 A at 40 °C, adjustable trip class, PROFINET/PROFIBUS DP.","salesMarkdown":"The Siemens SIMATIC 3RK1308-0AE00-0CP0 is a direct-on-line motor starter designed for switching and protecting three-phase motors up to 12 A at 40 °C ambient. It integrates a contactor and overload relay in one 30 mm wide housing that plugs onto a base unit for DIN-rail mounting, saving panel space compared to discrete components. Rated for continuous operation with an MTBF of 46 a, this starter is suited for conveyor, pump, and fan applications where the motor starts directly across the line. The adjustable trip class — selectable OFF, 5, or 10 — lets you match the thermal protection to the motor's starting characteristic: class 10 covers standard squirrel-cage motors, class 5 tightens protection for high-efficiency types with faster start times. ## Communication and control Both PROFINET and PROFIBUS DP protocols are built in, eliminating the need for a separate gateway or communication module. The starter accepts 4 bytes of input data and returns 2 bytes of output data, mapping status and control words into the PLC's I/O image. On-delay of 20 ms and off-delay of 35 to 50 ms are fixed, so sequence timing must account for these windows. Supply voltage range is 20.4 to 28.8 V DC, typical for a 24 V control loop. The safe state is load circuit open — on loss of communication or a fault, the output drops out, leaving the motor unpowered. This aligns with fail-safe behavior expected in a standard (non-SIL) motor starter. The 30 × 142 × 150 mm footprint (width × height × depth) fits standard 30 mm slot spacing. Clearance of 50 mm above and below is required for airflow and wiring access. Operating temperature range is -25 to +60 °C with derating above 40 °C, storage and transport range -40 to +70 °C. Vibration resistance is 15 mm at 6 Hz / 2g up to 500 Hz; shock resistance 6g for 11 ms — adequate for most machine-mounted enclosures.","metaTitle":"Siemens 3RK1308-0AE00-0CP0 SIMATIC DOL Starter, 12 A at 40 °","metaDescription":"Siemens 3RK1308-0AE00-0CP0 SIMATIC direct-on-line motor starter. Rated 12 A at 40 °C, adjustable trip class, PROFINET/PROFIBUS DP. Currently in active production. Source to RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"MTBF":"46 a","Note":"4 via 3DI/LC module","Depth":"150 mm","Width":"30 mm","title":"3RK1308-0AE00-0CP0","Height":"142 mm","Upwards":"50 mm","Downwards":"50 mm","Safe State":"Load circuit open","Trip Class":"CLASS OFF / 5 / 10 adjustable","description":"Direct-on-line starter High Feature; Incl. fan (3RW4928-8VB00); Electronic switching; Electronic overload protection up to 5.5 kW / 400 V; Adjustment range 4.0.. 12 A; PROFIenergy; Option: 3DI/LC module","Direct Start":"Yes","ON-delay time":"20 ms","Of The Inputs":"4 byte","During Storage":"-40 ... +70 °C","OFF-delay time":"35 ... 50 ms","Of The Outputs":"2 byte","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":"Direct-on-line starter","Reverse Starting":"No","Shock Resistance":"6g / 11 ms","Mounting Position":"Vertical, horizontal (observe derating)","On-Site Operation":"Yes","PROFINET protocol":"Yes","Product Brand Name":"SIMATIC","Type Of Assignment":"1","Degree Of Pollution":"2","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","Product Designation":"Direct-on-line starter","Overvoltage Category":"III","PROFIBUS DP protocol":"Yes","Vibration Resistance":"15 mm to 6 Hz; 2g to 500 Hz","at 230 V rated value":"2 hp","at 400 V rated value":"55 kA","at 500 V rated value":"55 kA","at 40 °C rated value":"12 A","at 50 °C rated value":"10 A","at 55 °C rated value":"9 A","at 60 °C rated value":"9 A","For Main Energy Infeed":"Plug contact to Base Unit","Remote Firmware Update":"Yes","At Switching On Of Motor":"230 mA","Number Of Digital Inputs":"4","at 110/120 V rated value":"0.5 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","according to IEC 60947-4-2":"AC-53a: 12 A: (8-0,5: 72-32)","according to IEC 60947-4-3":"AC-51: 12 A: (1,2-10: 50-360); AC-55a: 5 A: (3-240: 40-6)","1 For Digital Input Signals":"Pluggable module - accessory","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":"85 mA","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":"100 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","supports PROFIenergy measured values":"Yes","EMC immunity according to IEC 60947-1":"Class A","Type Of Voltage Of The Supply Voltage":"DC","due to burst according to IEC 61000-4-4":"2 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":"3.4 W","at 500 V according to UL 60947 rated value":"100 kA","in switching state OFF with bypass circuit":"2 W","protocol is supported AS-Interface protocol":"No","For Power Supply Reverse Polarity Protection":"Yes","equipment variant according to IEC 60947-4-2":"3","operational current at AC at 400 V rated value":"12 A","EMC emitted interference according to IEC 60947-1":"class A","electrostatic discharge according to IEC 61000-4-2":"8 kV air discharge","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","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":"12 A","operating voltage at AC at 60 Hz according to CSA and UL rated value":"480 V","Mechanical Service Life (Operating Cycles) Of The Main Contacts Typical":"30 000 000","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"4 ... 12 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$228.60","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/45ebac4f28855d8dc29bf386d139598f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=805679&mlfb=3RK1308-0AE00-0CP0"},"ai":{"faq":[{"question":"What is the MTBF of this motor starter?","answer":"The listed MTBF is 46 a (years), which provides a reliability baseline for continuous-operation lines."},{"question":"What does the '4 via 3DI/LC module' note mean?","answer":"The note indicates that up to 4 of these starters can be operated via a single 3DI/LC (digital input / load current) module, meaning the module handles the I/O and current sensing for a group of starters. This reduces wiring and PLC input count in multi-motor groups."},{"question":"What is the rated current at 40 °C?","answer":"The continuous rated current is 12 A at 40 °C ambient, with derating required at higher temperatures per the manual."},{"question":"Can this starter be used for reversing motor applications?","answer":"No, this is a direct-on-line starter only and does not support reverse starting. A separate reversing starter or contactor pair would be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1308-0AE00-0CP0","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/3RK1308-0AE00-0CP0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}