{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP1935-6MD31","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP1935-6MD31","canonicalUrl":"https://aoctrl.com/siemens/6EP1935-6MD31","factsUrl":"https://aoctrl.com/api/mcp/products/6EP1935-6MD31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP battery module, 2.5 Ah, 12 cells, DIN rail or keyhole mount, cURus, DNV GL, CE, EAC.","salesMarkdown":"## Panel fit and battery backup sizing The 6EP1935-6MD31 is a 2.5 Ah valve-regulated lead-acid battery module for the SITOP DC UPS family, snapping onto a DIN rail EN 60715 35x15 or mounting via keyhole slots for M4 screws — it fits in the same footprint as the UPS module it backs up. At 20 °C the battery delivers a typical 10-year float life; at 40 °C that drops to 3 years, and at 60 °C to 1 year — the temperature derating curve is steep, so the panel's ambient temperature directly sets the replacement interval. Capacity falls to 80 % of original per EUROBAT guidelines, which is the normal end-of-life threshold for this lead-acid chemistry — plan for periodic capacity checks if the load profile is critical. ## Charge voltage compensation across temperature The recommended float voltage varies with ambient temperature: 29 V at -10 °C, stepping down to 26.4 V at 60 °C — the SITOP UPS module adjusts its output to this curve automatically when paired with the battery temperature sensor. Terminal connections are screw-type, accepting 0.08 to 2.5 mm² wire for both + BAT and - BAT — the same gauge used for the UPS output, so no adapter terminal is needed. ## Lifecycle and regulatory standing Carries cURus recognition per UL 1778 and CSA C22.2 No. 107.1 (File E219627), plus shipbuilding approvals from ABS and DNV GL — it is accepted in marine and industrial control panels that require third-party listing. ATEX rating is No — this module is not certified for explosive atmospheres; install outside hazardous zones.","metaTitle":"Siemens 6EP1935-6MD31 Battery Module, 2.5 Ah, DIN Rail","metaDescription":"Siemens 6EP1935-6MD31 battery module for SITOP DC UPS. 2.5 Ah capacity, DIN rail mount, cURus, DNV GL. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["DIN Rail Power Supplies"],"specifications":{"ATEX":"No","title":"6EP1935-6MD31","DNV GL":"Yes","Typical":"capacity falls to 80 % of original capacity (according to EUROBAT)","CE marking":"Yes","UL approval":"Yes","description":"SITOP pure lead battery module 24 V/2.5 Ah with maintenance-free sealed lead batteries for SITOP DC UPS module 6 A and 15 A *Ex approval no longer available*","EAC approval":"Yes","Wall Mounting":"Yes","During Storage":"-40 ... +60 °C","Mounting Height":"171 mm","Number Of Cells":"12","lifecycle_stage":"current","Battery Capacity":"2.5 A·h","During Operation":"-40 ... +60 °C","During Transport":"-40 ... +60 °C","Fastening Method":"snaps onto DIN rail EN 60715 35x15 or keyhole mounting for hooking in to M4 screws","S7 rail mounting":"No","Other Information":"Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)","at 20 °C typical":"10 a","at 30 °C typical":"7 a","at 40 °C typical":"3 a","at 50 °C typical":"1.5 a","at 60 °C typical":"1 a","Installation Width":"285 mm","Operating data note":"For storage, mounting and operation of lead-acid batteries, the relevant DIN/VDE regulations or country-specific regulations (e.g. VDE 0510 Part 2/EN 50272-2) must be observed. You must ensure that the battery site is sufficiently ventilated. Possible sources of ignition must be at least 50 cm away.","as approval for USA":"cURus-Recognized (UL 1778, CSA C22.2 No. 107.1), File E219627","protection class IP":"IP00","at 0 °C recommended":"28.6 V","For Power Supply Unit":"1 screw terminal each for 0.08 ... 2.5 mm² for + BAT and - BAT","Shipbuilding Approval":"ABS, DNV GL","at 10 °C recommended":"28.3 V","at 20 °C recommended":"27.9 V","at 30 °C recommended":"27.5 V","at 40 °C recommended":"27.2 V","at 50 °C recommended":"26.8 V","at 60 °C recommended":"26.4 V","Depth Of The Enclosure":"91 mm","Standard Rail Mounting":"Yes","Width Of The Enclosure":"265 mm","at -10 °C recommended":"29 V","Height Of The Enclosure":"151 mm","Charging Current Maximum":"5 A","Product Component Included":"Accessories pack with solid-state circuitry fuse 15 A","cCSAus, Class 1, Division 2":"No","Type Of Electrical Connection":"spring-loaded terminals","output voltage at DC rated value":"24 V","Design Of The Overload Protection":"Valve control","Ambient Temperature During Storage":"Along with the storage and operating temperature, other factors such as the duration of the storage period and the charge status during storage have a decisive influence on the possible useful life. Batteries should therefore be stored as briefly as possible, always fully charged, and within the temperature range 0 to +20 °C.","Design Of Short-Circuit Protection":"Battery fuse 15 A/32 V (solid-state circuitry blade-type fuse + support)","Operating Resource Protection Class":"Class III","American Bureau of Shipping Europe Ltd. (ABS)":"Yes","relative temporary capacity loss at 20 °C in a month typical":"3 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$569.43","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3c8a67c1bf6553d3e292ee4d9c5f9508.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=191746&mlfb=6EP1935-6MD31"},"ai":{"faq":[{"question":"Does the 6EP1935-6MD31 work with SITOP DC UPS modules?","answer":"Yes, this is the dedicated battery module for the SITOP DC UPS family. It snaps onto the same DIN rail and connects via the screw terminals provided."},{"question":"What approvals does the 6EP1935-6MD31 carry?","answer":"cURus (UL 1778, CSA C22.2 No. 107.1), CE, EAC, ABS, and DNV GL shipbuilding approvals. ATEX is not listed."},{"question":"Where can I buy the Siemens 6EP1935-6MD31 battery module?","answer":"This module is sourced to order against your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP1935-6MD31","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/6EP1935-6MD31 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:41:02.429Z","lastPublished":"2026-07-20T14:41:02.429Z","indexable":true}}