{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1300-0KS01-0AA1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1300-0KS01-0AA1","canonicalUrl":"https://aoctrl.com/siemens/3RK1300-0KS01-0AA1","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1300-0KS01-0AA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS EM 300 DS electromechanical direct starter, 3RK1300-0KS01-0AA1, setting range 0.9...1.25A, AC-3 0.37kW/400V, IP65, PROFIBUS DP, with brake contact for externally supplied DC brakes.","salesMarkdown":"The Siemens 3RK1300-0KS01-0AA1 is an electromechanical direct starter from the SIRIUS EM 300 DS family, designed for the ET 200X distributed I/O system. It combines a motor-protective bimetal relay and a contactor in one IP65-rated enclosure, so it switches and protects a motor load directly without a separate overload relay. The setting range is 0.9 to 1.25 A, and at AC-3 duty (motor starting) on 400 V it is rated at 0.37 kW — that's the motor power it can switch under typical three-phase induction motor loads. It includes a motor brake output (DC 24 V / 3 A) for externally supplied brakes, which is a common requirement on conveyor and hoist applications where the load must hold position when power is removed. The unit communicates over PROFIBUS DP, so it can be controlled and monitored from a PLC without separate control wiring. This is a distributed starter — it mounts in the field near the motor, not on a central DIN rail in the main panel. Dimensions are 134 mm deep, 140 mm wide, and 270 mm high. The main current circuit connects via tab terminals, and the 9-pole motor feeder and 9-pole power connection are built into the housing. Operating temperature range is 0 to 55 °C, which covers most factory-floor conditions but not freezer or outdoor direct-sun applications. The 0.9 to 1.25 A setting range is the overload trip window — you set it to match the motor's full-load current. For a 0.37 kW motor at 400 V, the full-load current is typically around 1.0 A, so this starter covers that motor size exactly. If your motor draws more than 1.25 A, you need a larger starter. The PROFIBUS DP interface (yes, it has bus communication) means it can be integrated into a distributed control architecture — the PLC sees the starter's status and can issue start/stop commands over the fieldbus. No AS-Interface on this unit, so if your line uses AS-i, this is not the right variant.","metaTitle":"Siemens 3RK1300-0KS01-0AA1 EM 300 DS direct starter, 0.9-1.2","metaDescription":"Siemens SIRIUS 3RK1300-0KS01-0AA1 electromechanical direct starter, setting range 0.9-1.25A, AC-3 0.37kW/400V, IP65, PROFIBUS DP, with brake contact. Current lifecycle. Available t","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"134mm","Width":"140mm","Height":"270mm","Maximum":"0.37kW","Minimum":"0.37kW","Initial Value":"0.9A","Type of voltage":"DC","lifecycle_stage":"current","Full-scale value":"1.25A","Protection class IP":"IP65","PROFIBUS DP protocol":"Yes","AS-interface protocol":"No","Design of the product":"direct starter","Type of the motor protection":"bimetal","at AC-3 at 400 V rated value":"0.37kW","Operating voltage rated value":"400 ... 500V","Design of the switching contact":"electromechanical","Design of short-circuit protection":"circuit-breakers","Product function Bus communication":"Yes","Ambient temperature during operation":"0 ... 55°C","Product component Motor brake output":"Yes","Equipment marking acc. to DIN EN 61346-2":"Q","Type of electrical connection for main current circuit":"tab terminals","Maximum short-circuit current breaking capacity (Icu) at 400 V rated value":"50A"}},"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=92779&mlfb=3RK1300-0KS01-0AA1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1300-0KS01-0AA1/alternatives.json"},"ai":{"faq":[{"question":"Will 3RK1300-0KS01-0AA1 drop into a panel specified around 3RT1055-6QF35 without rewiring?","answer":"No — the 3RT1055-6QF35 is a SIRIUS power contactor with screw-type terminals and a different form factor (170 mm deep, 172 mm high), while the 3RK1300-0KS01-0AA1 is an IP65 direct starter with tab terminals and a 270 mm height. They are not footprint-compatible and serve different roles: the contactor is a panel-mount component, the direct starter is a field-mount distributed unit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1300-0KS01-0AA1","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/3RK1300-0KS01-0AA1 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}}