{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1303-5BS41-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1303-5BS41-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RK1303-5BS41-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1303-5BS41-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens reversing starter, 3RK1303-5BS41-1AA0, solid-state motor protection, 3 A at 400 V AC-3, IP65, PROFIBUS DP, 2 digital inputs, 100 kA SCCR.","salesMarkdown":"## Reversing starter with solid-state protection and PROFIBUS DP The Siemens 3RK1303-5BS41-1AA0 is a reversing starter designed for motor control in automated machinery. Housed in an IP65 enclosure (250 x 130 x 107 mm), this unit is suited for washdown or dusty environments — think food processing lines or packaging cells where hose-down cleaning is routine. The IP65 rating means the enclosure keeps out dust and low-pressure water jets, so you can mount it near the machine rather than in a sealed cabinet. Communication runs over PROFIBUS DP (no PROFINET on this variant), with two parameterizable digital inputs via M12 sockets. The supply voltage is 24 V DC (20.4–28.8 V range), and the main power infeed uses an ISO23570 socket — a standardized connector for motor starters in this Siemens family. ## Short-circuit rating and protection design The unit carries a 100 kA short-circuit current rating at 400 V, with fuse-based short-circuit protection. The solid-state motor protection handles overloads electronically rather than with a thermal bimetal, giving more precise tripping and easier reset. Mechanical switching contacts are rated for fewer than 1 error per 100 million operating cycles — a reliability figure that matters for high-cycling applications like indexing conveyors or pick-and-place cells where contact wear drives maintenance intervals. ## Sourcing and fit considerations The 130 mm width and 107 mm depth mean it occupies a moderate footprint on a sub-panel or in a junction box. The load-side outgoing feeder also uses an ISO23570 socket, consistent with the infeed — so cabling is standardized across the motor branch. For a panel originally wired around a different Siemens reversing starter (like the 3RT series), the ISO23570 interface may not match directly; check the connector pattern before assuming a drop-in swap.","metaTitle":"Siemens 3RK1303-5BS41-1AA0 Reversing Starter, 3 A AC-3, IP65","metaDescription":"Siemens 3RK1303-5BS41-1AA0 reversing starter with solid-state motor protection. Rated 3 A at 400 V AC-3, 100 kA SCCR, IP65. PROFIBUS DP, 2 digital inputs. Current lifecycle. Availa","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"107 mm","Width":"130 mm","at DC":"24 ... 24 V","Height":"250 mm","Type Of Voltage":"DC","lifecycle_stage":"current","Bus Communication":"Yes","PROFINET protocol":"No","at DC rated value":"20.4 ... 28.8 V","Type Of Assignment":"1","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","protection class IP":"IP65","PROFIBUS DP protocol":"Yes","at 400 V rated value":"100 kA","Design Of The Product":"reversing starter","Of Auxiliary Contacts":"< 1 error per 100 million operating cycles","For Main Energy Infeed":"socket according to ISO23570","supply voltage 1 at DC":"24 ... 24 V","Number Of Digital Inputs":"2","Short Circuit Protection":"Yes","For Digital Input Signals":"2","For Digital Output Signals":"0","1 For Digital Input Signals":"M12 socket","2 For Digital Input Signals":"M12 socket","Operating Frequency Minimum":"1 1/h","brake control with 400 V AC":"No","For Supply Voltage Line-Side":"hybrid plug","Type Of The Motor Protection":"solid-state","at AC-3 at 400 V rated value":"3 A","For Load-Side Outgoing Feeder":"socket according to ISO23570","Operating Voltage Rated Value":"400 ... 500 V","Substance Prohibitance (Date)":"05/01/2012","Digital Inputs Parameterizable":"Yes","For Communication Transmission":"hybrid socket","Of The Communication Interface":"hybrid plug","Design Of The Switching Contact":"mechanical","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"hybrid socket","Design Of Short-Circuit Protection":"fuse","Ambient Temperature During Operation":"-20 ... +40 °C","Product Component Motor Brake Output":"No","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","design of the interface PROFINET protocol":"No","with low demand rate according to SN 31920":"50 %","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"75 %","operating power at AC-3 at 400 V rated value":"1 100 W","At The Manufacturer-Specific Device Interface":"M12 socket","Type Of Voltage Of The Control Supply Voltage":"DC","Type Of Electrical Connection For Main Current Circuit":"tab terminals","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.3 ... 3 A"}},"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=207252&mlfb=3RK1303-5BS41-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1303-5BS41-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 3RK1303-5BS41-1AA0?","answer":"Rated 3 A at 400 V AC-3 for reversing motor duty, with a 100 kA short-circuit current rating at 400 V. Supply is 24 V DC (20.4–28.8 V range). Enclosure is IP65."},{"question":"Where can I buy 3RK1303-5BS41-1AA0 and get current pricing?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"Does 3RK1303-5BS41-1AA0 support PROFINET?","answer":"No, this variant supports PROFIBUS DP only. For PROFINET communication, a different order code in the same family would be needed."},{"question":"What compliance documentation is available for 3RK1303-5BS41-1AA0?","answer":"RoHS compliance is declared with a substance prohibition date of 05/01/2012. The part carries the standard Siemens declarations for CE and UL; specific certificates are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1303-5BS41-1AA0","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/3RK1303-5BS41-1AA0 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}}