{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6GK7377-1AA00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6GK7377-1AA00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6GK7377-1AA00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6GK7377-1AA00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC CSM 377, 4-port unmanaged switch, 10/100 Mbit/s, S7-300 rail mount, 19.2-28.8 VDC, IP20, ATEX/UL hazloc approved.","salesMarkdown":"## Rail fit and port count The 6GK7377-1AA00-0AA0 is a SIMATIC S7-300 device-design unmanaged switch that snaps onto the S7-300 rail. Four electrical ports, each running 10 or 100 Mbit/s, with no managed switching or multiport mirroring. ## Supply and power budget Runs on 19.2 to 28.8 VDC through a 2-pole terminal block, drawing 0.07 A max — negligible load on the rack power supply. Dissipates 1.6 W, so no forced-air concern in a sealed IP20 enclosure. ## Environmental and approvals Operates 0 to 60 °C, stores and transports at -40 to +70 °C. IP20 protection — panel-only, no washdown. Carries ATEX II 3 G Ex nA (KEMA 06 ATEX 0021 X) and UL 1604 / UL 2279-15 for hazardous locations, plus marine approvals DNV, NK, and LRS. EMC immunity per EN 61000-6-2:2001, emission per EN 61000-6-4:2001.","metaTitle":"Siemens 6GK7377-1AA00-0AA0 CSM 377, 4-port unmanaged switch","metaDescription":"Siemens 6GK7377-1AA00-0AA0 CSM 377 unmanaged switch, 4 ports 10/100 Mbit/s, S7-300 rail mount, 19.2-28.8 VDC, IP20, ATEX/UL hazloc.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC Communication Modules"],"specifications":{"MTBF":"144 a","Depth":"118 mm","Width":"40 mm","C-Tick":"Yes","Design":"SIMATIC S7-300 device design","Height":"125 mm","for FM":"FM3611: Class 1, Divison 2, Group A, B, C, D / T.., CL.1, Zone 2, GP. IIC, T.. Ta","KC approval":"No","For Multimode":"0","Transfer Rate":"10 Mbit/s, 100 Mbit/s","Wall Mounting":"No","During Storage":"-40 ... +70 °C","from CSA and UL":"UL 1604 and UL 2279-15 (Hazardous Location)","lifecycle_stage":"current","During Operation":"0 ... 60 °C","During Transport":"-40 ... +70 °C","For Power Supply":"2-pole terminal block","Multiport Mirroring":"No","protection class IP":"IP20","S7-300 rail mounting":"Yes","Security Information":"Siemens provides products and solutions with industrial security functions that support the secure operation of plants, solutions, machines, equipment and/or networks. They are important components in a holistic industrial security concept. With this in mind, Siemens’ products and solutions undergo continuous development. Siemens recommends strongly that you regularly check for product updates. For the secure operation of Siemens products and solutions, it is necessary to take suitable preventive action(e.g. cell protection concept) and integrate each component into a holistic, state-of-the-art industrial security concept. Third-party products that may be in use should also be considered. For more information about industrial security, visit http://www.siemens.com/industrialsecurity. To stay informed about product updates as they occur, sign up for a product-specific newsletter. For more information, visit http://support.automation.siemens.com. (V3.4)","for single mode (LD)":"0","S7-1500 rail mounting":"No","Germanische Lloyd (GL)":"No","Det Norske Veritas (DNV)":"Yes","For Emitted Interference":"EN 61000-6-4:2001","Nippon Kaiji Kyokai (NK)":"Yes","according to IEC 81346-2":"KF","For Interference Immunity":"EN 61000-6-2:2001","Polski Rejestr Statkow (PRS)":"No","for safety / from CSA and UL":"UL 508, CSA C22.2 No. 142","Standard / For Hazardous Zone":"EN 60079-15, II 3 G Ex nA II T.., KEMA 06 ATEX 0021 X","according to IEC 81346-2:2019":"KFE","Consumed Current / 1 / Maximum":"0.07 A","35 mm top hat DIN rail mounting":"No","Supply Voltage / 1 / Rated Value":"19.2 ... 28.8 V","power loss [W] / 1 / rated value":"1.6 W","Lloyds Register of Shipping (LRS)":"Yes","Product Function / Switch-Managed":"No","Number Of Electrical Ports / Maximum":"4","French marine classification society (BV)":"Yes","Type Of Voltage / 1 / Of The Supply Voltage":"DC","For Network Components Or Terminal Equipment":"4","Royal Institution of Naval Architects (RINA)":"No","American Bureau of Shipping Europe Ltd. (ABS)":"Yes","CCC / for hazardous zone according to GB standard":"Yes","Parallel Redundancy Protocol (PRP)/operation in the PRP-network":"Yes","Parallel Redundancy Protocol (PRP)/Redundant Network Access (RNA)":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$180.34 – $409.59","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a17295a19e8554114c143dab068909b1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=515704&mlfb=6GK7377-1AA00-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6GK7377-1AA00-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Is the Siemens 6GK7377-1AA00-0AA0 compatible with S7-1500 or S7-1200?","answer":"No — this is a SIMATIC S7-300 device-design module that mounts on the S7-300 rail only. It is not compatible with S7-1500 or S7-1200 racks."},{"question":"Can the CSM 377 be used as a standalone managed switch?","answer":"No — this is an unmanaged switch with no managed-switch functions (no multiport mirroring, no web interface). It is a plug-and-play layer-2 switch for the S7-300 backplane."},{"question":"What is 6GK7377-1AA00-0AA0's listed MTBF?","answer":"144 years (a), a reliability figure typical for industrial Ethernet switches in controlled environments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6GK7377-1AA00-0AA0","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/6GK7377-1AA00-0AA0 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}}