{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7405-0KA02-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7405-0KA02-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7405-0KA02-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7405-0KA02-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-400 PS405 power supply, wide-range 24/48/60 V DC input, 5 V DC/10 A backplane bus output, 2 slots wide, active production.","salesMarkdown":"## PS405 power supply for S7-400 racks The Siemens 6ES7405-0KA02-0AA0 is the PS405 wide-range power supply for the SIMATIC S7-400 rack system, accepting 24 V DC, 48 V DC, or 60 V DC input and delivering a regulated 5 V DC output at 10 A to the backplane bus. It occupies two slots on the rack and requires no base load on the 5 V DC backplane bus, which simplifies commissioning when the rack is partially populated. The unit is rated for continuous operation from 0 °C to 60 °C ambient, with an FM approval at T4 temperature class, and carries BIS and CCC certifications for global project deployment. ## Backplane current and hold-up performance The 5 V DC backplane bus is rated at 10 A maximum, with an additional 1 A available at 24 V DC for the backplane — both rails are idling-proof, meaning the supply regulates correctly even with zero load. Mains buffering holds the output for 20 ms on voltage failure, and the design meets NAMUR recommendation for process industry ride-through requirements. Inrush current is limited to 18 A peak with a 20 ms half-width pulse, which keeps the upstream breaker selection straightforward — a standard C-curve MCB on the DC feed handles it without nuisance tripping. ## Input voltage flexibility and output ratings The PS405 accepts three nominal DC input voltages, with corresponding output current ratings: 4 A at 24 V DC input, 2 A at 48 V DC, and 1.6 A at 60 V DC. Typical active power input is 95 W with a 20 W power loss, so the unit runs cool enough that adjacent slot modules aren't thermally stressed in a standard 290 mm rack. An optional backup battery pack (2x lithium AA, 3.6 V / 2.2 Ah) can be fitted to maintain the backplane buffer during extended power outages. The module measures 50 mm wide by 290 mm high by 217 mm deep, occupying two rack slots — verify slot availability before specifying. Power connection uses 3x 1.5 mm² solid or stranded wire with end sleeves, accepting an external cable diameter of 3 mm to 9 mm. Equipment protection class I requires a protective conductor connection. Overvoltage category II applies, so the supply is intended for installation within a panel where transient overvoltages are limited by upstream distribution.","metaTitle":"Siemens 6ES7405-0KA02-0AA0 PS405 Power Supply, 10A DC","metaDescription":"Siemens SIMATIC S7-400 PS405 power supply, 24/48/60 V DC input, 5 V DC/10 A backplane output. Active production, BIS/CCC/FM approved. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"BIS":"Yes","CCC":"Yes","Max.":"60 °C","Min.":"0 °C","Depth":"217 mm","Width":"50 mm","5 V DC":"Yes","Height":"290 mm","24 V DC":"Yes","48 V DC":"Yes","60 V DC":"Yes","FM approval":"Yes; Ta: 0 °C to 60 °C T4","Required Slots":"2","Weight, approx.":"1 200 g","lifecycle_stage":"mature","Power loss, typ.":"20 W","Primary/Secondary":"Yes","Inrush current, max.":"18 A; Full width at half maximum 20 ms","Overvoltage category":"II","Rated value at 24 V DC":"4 A","Rated value at 48 V DC":"2 A","Rated value at 60 V DC":"1.6 A","Type of output voltage":"DC","Active power input, typ.":"95 W","Short-circuit protection":"Yes","Backup battery (optional)":"Yes; 2x lithium AA; 3.6 V / 2.2 Ah","Equipment protection class":"I, with protective conductor","Design of electrical connection":"3x 1.5 mm², solid or stranded wire with end sleeve, external diameter 3 mm to 9 mm","for backplane bus (5 V DC), max.":"10 A; no base load required","for backplane bus (24 V DC), max.":"1 A; idling-proof","Mains/voltage failure stored energy time":"20 ms","Mains buffering according to NAMUR recommendation":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$527.72","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fd3f09ea25d0bbf65005bf3b90250985.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=406552&mlfb=6ES7405-0KA02-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7405-0KA02-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Will 6ES7405-0KA02-0AA0 drop into a panel specified for 6ES7405-0DA02-0AA1 without rewiring?","answer":"Yes, the wiring connections are identical — both use 3x 1.5 mm² solid or stranded wire with end sleeves and 3 mm to 9 mm cable diameter. The protective conductor connection and equipment protection class I are the same. The only physical difference is width: this unit occupies two slots (50 mm) versus one slot (25 mm) for the peer, so the rack must have the extra slot free."},{"question":"What is the hold-up time on mains failure?","answer":"The mains/voltage failure stored energy time is 20 ms, and the design meets NAMUR recommendation for process-industry buffering. This is sufficient for most PLC backplanes to complete a safe shutdown sequence."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7405-0KA02-0AA0","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/6ES7405-0KA02-0AA0 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}}