{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7505-0KA00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7505-0KA00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7505-0KA00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7505-0KA00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-1500 system power supply PS 25W, 24 V DC, 1.3 A rated input, 25 W infeed to backplane bus, IP20, active production.","salesMarkdown":"## Backplane bus supply for S7-1500 racks The Siemens 6ES7505-0KA00-0AB0 is the 25 W system power supply that feeds the backplane bus of a SIMATIC S7-1500 rack — it converts the 24 V DC field supply into the internal logic voltage the CPU and I/O modules need to communicate. Rated input is 1.3 A at 24 V DC, with a static permissible range of 19.2 V to 28.8 V DC and a dynamic window down to 18.5 V and up to 30.2 V DC — wide enough to ride through a sagging field supply without dropping the rack. It delivers 25 W to the backplane bus and dissipates 6.2 W of its own heat at nominal load — that loss sits inside the enclosure, so factor it into the panel thermal budget. ## Protection and hold-up for dirty lines Built-in short-circuit protection and reverse polarity protection mean the supply handles a miswired 24 V line or a downstream bus fault without letting the magic smoke out — a common headache in field-terminated panels. On a mains/voltage failure, the supply holds up the backplane bus for 20 ms — enough for a CPU with a retentive memory cycle to finish its current scan and enter a defined stop state before the rack browns out. Equipment protection class III with a protective conductor connection means it relies on SELV/PELV supply and the PE bond for fault clearing — standard for control cabinet installations. ## DIN-rail fit and environmental limits IP20 rated — it is open to the cabinet environment, so install it in a clean, dry enclosure; it is not sealed against washdown or dust ingress. Rated for installation altitudes up to 5 000 m, with restrictions above 2 000 m per the manual — the derating at high altitude is due to reduced air density for cooling. This part carries an active lifecycle status — it is current-production from Siemens, not a phase-out or obsolete line. It is compatible with the SIMATIC S7-1500 platform and is configurable from STEP 7 V5.5 SP3 or TIA Portal V12 onward — no firmware upgrade needed for standard racks.","metaTitle":"Siemens 6ES7505-0KA00-0AB0 PS 25W, 24 V DC, for S7-1500","metaDescription":"SIMATIC S7-1500 system power supply, 25 W infeed to backplane bus, 24 V DC rated at 1.3 A, short-circuit and reverse polarity protection, active production","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLC Communication Modules"],"specifications":{"Depth":"129 mm","Width":"35 mm","Height":"147 mm","Weight, approx.":"350 g","lifecycle_stage":"current","Firmware version":"V1.0.0","Rated value (DC)":"24 V","Status indicator":"Yes","Primary/Secondary":"Yes","HW functional status":"FS02","Isolation tested with":"707 V DC (type test)","Rated value at 24 V DC":"1.3 A","IP degree of protection":"IP20","Short-circuit protection":"Yes","Equipment protection class":"III, with protective conductor","Reverse polarity protection":"Yes","Infeed power to the backplane bus":"25 W","permissible range, lower limit (DC)":"19.2 V; Static 19.2 V, dynamic 18.5 V","permissible range, upper limit (DC)":"28.8 V; Static 28.8 V, dynamic 30.2 V","Power loss at nominal rating conditions":"6.2 W","Mains/voltage failure stored energy time":"20 ms","Installation altitude above sea level, max.":"5 000 m; Restrictions for installation altitudes > 2 000 m, see manual","STEP 7 configurable/integrated from version":"V5.5 SP3 or higher","STEP 7 TIA Portal configurable/integrated from version":"V12 / V12"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$153.28 – $275.27","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e15c16d0eb0a2f8479409c2672fafc3f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=101003&mlfb=6ES7505-0KA00-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7505-0KA00-0AB0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy Siemens 6ES7505-0KA00-0AB0 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution channels."},{"question":"Is 6ES7505-0KA00-0AB0 compatible with SIMATIC S7-1500?","answer":"Yes, it is the designated system power supply for the S7-1500 backplane bus, feeding 25 W to the rack and configurable from STEP 7 V5.5 SP3 or TIA Portal V12 onward."},{"question":"Does 6ES7505-0KA00-0AB0 have reverse polarity protection?","answer":"Yes, it includes both short-circuit protection and reverse polarity protection on the 24 V DC input, so a miswired supply line will not damage the module."},{"question":"What is the output power rating of Siemens 6ES7505-0KA00-0AB0?","answer":"It delivers 25 W to the S7-1500 backplane bus, drawing 1.3 A at 24 V DC nominal input, with a power loss of 6.2 W at nominal load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7505-0KA00-0AB0","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/6ES7505-0KA00-0AB0 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}}