{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5KS70-2AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5KS70-2AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5KS70-2AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5KS70-2AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC 3RK1304-5KS70-2AA3 motor starter, direct start, 4 digital inputs, 24 V DC, adjustable trip class 5/10/20/30, PROFINET and PROFIBUS DP, IP65, screw fixing.","salesMarkdown":"## Direct-start motor starter with adjustable trip class The 3RK1304-5KS70-2AA3 is a SIMATIC-branded motor starter configured for direct-start duty — it switches the motor directly across the line without a reversing contactor. The trip class is field-adjustable among CLASS 5, 10, 20, and 30, meaning you can match the thermal overload curve to the motor's starting profile: a high-inertia load that takes 15 seconds to accelerate needs CLASS 20 or 30; a quick-start pump can use CLASS 10. Rated short-circuit breaking capacity at 400 V is 100,000 A — that is a 100 kA SCCR, high enough to coordinate with most upstream moulded-case breakers without cascading failure under a line-to-line fault. The power dissipation with the bypass circuit engaged is 1.944 W; without bypass it is the same 1.944 W. ## On-machine I/O and fieldbus integration This motor starter carries 4 digital inputs (M12 socket per input) and no digital outputs — the inputs are sized for local feedback (e.g., motor-mounted limit switches, proximity sensors) and the outputs are handled by the internal contactor. The input data length is 2 bytes; the output data length is also 2 bytes. Dual-protocol support: PROFINET and PROFIBUS DP are both listed as supported, so the unit can be dropped into either an RT/IRT PROFINET line or a legacy DP network without a gateway. The type of assignment is 1 — a single device node on the bus. ## Environmental and panel-fit specs Enclosure rating is IP65, meaning the housing is dust-tight and protected against low-pressure water jets — suitable for on-machine mounting in washdown areas or damp environments. The unit is fastened by screw fixing (not DIN-rail snap-on) and can be mounted vertically or horizontally. Dimensions: 160 mm depth, 110 mm width, 230 mm height — plan the gland plate and enclosure depth accordingly. Pollution degree 3 means it tolerates conductive pollution (condensation, light splashes) without conformal coating inside the enclosure. Vibration resistance is 2g; shock resistance is 15g for 11 ms.","metaTitle":"Siemens 3RK1304-5KS70-2AA3 SIMATIC Motor Starter","metaDescription":"Siemens 3RK1304-5KS70-2AA3 SIMATIC motor starter with direct start, adjustable trip class 5-30, 4 DI, PROFINET/PROFIBUS DP, IP65. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"160 mm","Width":"110 mm","at DC":"24 ... 24 V","title":"3RK1304-5KS70-2AA3","Height":"230 mm","Trip Class":"CLASS 5, 10, 20 and 30 adjustable","description":"ET 200pro EDSE/DSSE HF electronic DOL starter electronic (soft-) switching Full motor protection consisting of: electronic overload protection + thermistor 400 V 3 AC/0.9 kW 0.15 A...2.00 A Brake contact 400 V AC 4 DI Han Q4/2 - Han Q8/0","Direct Start":"Yes","Of The Inputs":"2 byte","During Storage":"-40 ... +70 °C","Of The Outputs":"2 byte","Type Of Voltage":"AC","lifecycle_stage":"current","During Operation":"-25 ... +55 °C","During Transport":"-40 ... +70 °C","Fastening Method":"screw fixing","Reverse Starting":"No","Shock Resistance":"15g / 11 ms","Mounting Position":"vertical, horizontal","PROFINET protocol":"Yes","at DC rated value":"20.4 ... 28.8 V","Product Brand Name":"SIMATIC","Type Of Assignment":"1","Degree Of Pollution":"3","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","Product Designation":"Motor starters","With Bypass Circuit":"1.944 W","protection class IP":"IP65","PROFIBUS DP protocol":"Yes","Vibration Resistance":"2g","at 400 V rated value":"100 000 A","Design Of The Product":"direct starter","For Main Energy Infeed":"socket according to ISO23570","Without Bypass Circuit":"1.944 W","supply voltage 1 at DC":"24 ... 24 V","Number Of Digital Inputs":"4","For Digital Input Signals":"4","For Digital Output Signals":"0","at AC at 400 V rated value":"2 A","brake control with 24 V DC":"No","1 For Digital Input Signals":"M12 socket","2 For Digital Input Signals":"M12 socket","3 For Digital Input Signals":"M12 socket","4 For Digital Input Signals":"M12 socket","brake control with 180 V DC":"No","brake control with 230 V AC":"No","brake control with 400 V AC":"Yes","brake control with 500 V DC":"No","For Main Energy Transmission":"socket according to ISO23570","For Supply Voltage Line-Side":"via backplane bus","Type Of The Motor Protection":"full motor protection","at AC-3 at 400 V rated value":"900 W","For Load-Side Outgoing Feeder":"socket according to ISO23570","Operating Voltage Rated Value":"200 ... 400 V","Substance Prohibitance (Date)":"05/01/2012","supports PROFIenergy shutdown":"Yes","Digital Inputs Parameterizable":"Yes","Insulation Voltage Rated Value":"400 V","Design Of The Switching Contact":"solid-state / thyristor / 2 phases","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"via backplane bus","Design Of Short-Circuit Protection":"fuse","Product Function Bus Communication":"Yes","Product Function On-Site Operation":"Yes","Relative Humidity During Operation":"5 ... 95 %","Product Component Motor Brake Output":"Yes","Surge Voltage Resistance Rated Value":"6 kV","supports PROFIenergy measured values":"Yes","Type Of Voltage Of The Supply Voltage":"DC","reference code according to IEC 81346-2":"Q","Number Of Poles For Main Current Circuit":"3","control supply voltage at DC rated value":"20.4 ... 28.8 V","Product Function Short Circuit Protection":"Yes","Supply Voltage For Brake Control Required":"400 V","Touch Protection Against Electrical Shock":"finger-safe","design of the interface PROFINET protocol":"Yes","with low demand rate according to SN 31920":"100 FIT","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"75 %","At The Manufacturer-Specific Device Interface":"optical interface","Type Of Voltage Of The Control Supply Voltage":"DC","Type Of Electrical Connection For Main Current Circuit":"tab terminals","Installation Altitude At Height Above Sea Level Maximum":"3 500 m","Type Of Electrical Connection Of The Communication Interface":"via backplane bus","Type Of Voltage Of The Supply Voltage For Brake Control Required":"AC","operating range relative to the operating voltage at AC at 50 Hz":"200 ... 440 V","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","Maximum Permissible Voltage For Safe Isolation Between Main And Auxiliary Circuit":"400 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.15 ... 2 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$488.95","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/08082d0b7f807b3f94078f6463d4f3f7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=211330&mlfb=3RK1304-5KS70-2AA3"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RK1304-5KS70-2AA3?","answer":"The part is sourced through authorized distribution channels."},{"question":"What is the trip class range on this motor starter?","answer":"The trip class is adjustable among CLASS 5, 10, 20, and 30, allowing you to match the overload curve to the motor's starting profile."},{"question":"Does the 3RK1304-5KS70-2AA3 support PROFINET?","answer":"Yes, it supports both PROFINET and PROFIBUS DP protocols, so it can be integrated into either network without a gateway."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5KS70-2AA3","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/3RK1304-5KS70-2AA3 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}}