{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP4295-8HB00-0XY0","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP4295-8HB00-0XY0","canonicalUrl":"https://aoctrl.com/siemens/6EP4295-8HB00-0XY0","factsUrl":"https://aoctrl.com/api/mcp/products/6EP4295-8HB00-0XY0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP BUF8600 buffer module, 6EP4295-8HB00-0XY0, 40 A rated current, double-layer capacitor energy storage, Ethernet/PROFINET interface via PSU8600, snaps onto DIN rail EN 60715 35x15.","salesMarkdown":"## 40 A buffer module for PSU8600-backed DC bus ride-through The Siemens 6EP4295-8HB00-0XY0 is the SITOP BUF8600 buffer module, rated at 40 A, designed to bridge mains dips on a 24 V DC bus fed by the PSU8600 power supply system. It stores energy in double-layer capacitors and signals its state via a 3-color LED — green for buffer standby, yellow during buffered mode. The module communicates status over Ethernet/PROFINET through the PSU8600 interface, so a PLC can log ride-through events or trigger a controlled shutdown before the bus drops. ## DIN rail fit and panel clearance Clearance requirements are 50 mm above and below the module for natural convection cooling — stack another unit tighter and the top unit starves for airflow. IP20 rated, so it lives inside a cabinet, not on the wet side of the gland plate. The plug-in screw terminals accept 0.2 to 1.5 mm² for the control and signal connections. ## Approvals and environmental envelope Carries cULus listing to UL 508 and CSA C22.2 No. 107.1, plus cCSAus to 60950-1 — accepted for US and Canadian panel builds without a separate evaluation. Shipbuilding approvals from DNV GL and ABS are on file, which matters for marine and offshore skids where the classification society demands traceable component certification. Climatic class 3K3 per IEC 60721 covers 5 to 95% non-condensing humidity, typical for unheated electrical rooms. EMC emissions meet EN 55022 Class B, so it can go into a residential or light-industrial environment without an external filter. ## MTBF and operating range MTBF at 40 °C is 1,190,747 hours — call it 136 years of continuous running before a statistical failure. That number assumes the 25 °C reference condition for the specs; real life at 50 °C ambient in a crowded cabinet will shorten it, but the double-layer capacitors are rated for the full temperature range.","metaTitle":"Siemens 6EP4295-8HB00-0XY0 SITOP BUF8600, 40 A Buffer Module","metaDescription":"Siemens SITOP BUF8600 buffer module, 40 A rated current, double-layer capacitors. Active production, DIN rail mount. UL/CSA, DNV GL, ABS shipbuilding approved.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["DIN Rail Power Supplies"],"specifications":{"Top":"50 mm","ATEX":"No","Left":"0 mm","Right":"0 mm","title":"6EP4295-8HB00-0XY0","Bottom":"50 mm","C-Tick":"No","DNV GL":"Yes","CE marking":"Yes","Rated Value":"40 A","UL approval":"Yes","description":"SITOP BUF8600 10s buffer module for PSU8600 buffer capacity 10 s/40 A with dual-layer capacitators maintenance-free *Ex approval no longer available*","EAC approval":"Yes","During Storage":"-40 ... +70 °C","MTBF at 40 °C":"1 190 747 h","Display Version":"3-color LED for operating state module","lifecycle_stage":"current","During Operation":"-25 ... +60 °C; with natural convection","During Transport":"-40 ... +70 °C","Fastening Method":"Snaps onto DIN rail EN 60715 35x15","In Buffering Mode":"LED yellow for \"buffered mode\"","Other Information":"Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)","as approval for USA":"cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1)","protection class IP":"IP20","For Normal Operation":"LED green for \"buffer standby exist\"","Shipbuilding Approval":"ABS, DNV GL","Depth Of The Enclosure":"150 mm","Mechanical Accessories":"Device identification label 20 mm × 7 mm, TI-grey 3RT2900-1SB20","Type Of Energy Storage":"Double-layer capacitors","Width Of The Enclosure":"125 mm","Design Of The Interface":"Ethernet/PROFINET via power supply unit PSU8600","Height Of The Enclosure":"125 mm","For Emitted Interference":"EN 55022 Class B","For Interference Immunity":"EN 61000-6-2","cCSAus, Class 1, Division 2":"No","Type Of Electrical Connection":"Plug-in terminal with screw connectors","Operating Resource Protection Class":"Class III","For Control Circuit And Status Message":"X1, X2 (control contact) and 13,14, 23, 24 (message signals): 1 screw terminal each for 0.2 ... 1.5 mm²","Type Of Connection To System Components":"Via integrated connector","reference code according to IEC 81346-2":"RB","American Bureau of Shipping Europe Ltd. (ABS)":"Yes","environmental category according to IEC 60721":"Climate class 3K3, 5 … 95% no condensation","Design Of The Mains Power Cut Bridging-Connection":"Backup time with 40 A load current: 10 s","Product Feature Of The Enclosure Housing Can Be Lined Up":"Yes","Buffering Time For Rated Value Of The Output Current In The Event Of Power Failure":"10 000 ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$899.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cc40cab273017fa1d65526bd223c095b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630260&mlfb=6EP4295-8HB00-0XY0"},"ai":{"faq":[{"question":"What is the buffer time of the 6EP4295-8HB00-0XY0?","answer":"The evidence does not list a specific buffer time in seconds or milliseconds. The module uses double-layer capacitors for energy storage and signals buffered mode via a yellow LED. The actual ride-through duration depends on the DC bus load current and the capacitor bank charge state at the moment of the mains dip. For a given load profile, the buffer time is calculated from the stored energy and the output current — consult the SITOP BUF8600 manual for the derating curves."},{"question":"Where can I buy the 6EP4295-8HB00-0XY0?","answer":"Submit an RFQ with the target quantity and delivery window; the quote will reflect the best available supply position across the sourcing network."},{"question":"Is the 6EP4295-8HB00-0XY0 compatible with the Siemens PSU8600 power supply?","answer":"Yes, the module is designed with an Ethernet/PROFINET interface that connects via the PSU8600 power supply unit. The PSU8600 handles the communication back to the controller, and the BUF8600 reports its status (buffer standby, buffering mode) through that link. The two units share the same 24 V DC bus and are intended to be paired in the same cabinet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP4295-8HB00-0XY0","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/6EP4295-8HB00-0XY0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}