{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP1935-6ME21","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP1935-6ME21","canonicalUrl":"https://aoctrl.com/siemens/6EP1935-6ME21","factsUrl":"https://aoctrl.com/api/mcp/products/6EP1935-6ME21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP battery module, 7 Ah, 12 cells, 6EP1935-6ME21, UL 1778, DNV GL, IP00.","salesMarkdown":"The Siemens 6EP1935-6ME21 is a sealed lead-acid battery module with 12 cells and a 7 Ah capacity, designed to back up a DC bus in a SITOP UPS system. It's the storage half of the uninterruptible supply — when the mains drop, this module holds the 24 V rail up long enough for a controlled shutdown or to ride through a sag. The 7 Ah rating at 20 °C gives you roughly the runtime you'd expect from that capacity; the real-world number depends on the load current and ambient temperature. The charging current is capped at 1.75 A, so the UPS charger must be sized to stay under that limit — exceeding it shortens cell life. The temperature-compensated charge voltage is specified from 29 V at -10 °C down to 26.3 V at 50 °C; a fixed-voltage charger will overcharge in summer and undercharge in winter, so this module expects a smart charging algorithm that follows the curve. Service life drops fast with heat: 4 years at 20 °C, 2 years at 30 °C, 1 year at 40 °C, and only 6 months at 50 °C. Mount it away from hot power supplies and drives if you want the full lifespan. This is an IP00 module — no ingress protection, so it lives inside a clean, dry cabinet, not out on the plant floor near washdown or dust. It mounts to a flat surface using keyhole slots for M4 screws; there's no DIN-rail or S7 rail option, so plan for a dedicated spot on the backplate. The enclosure dimensions are 186 mm wide by 168 mm tall by 121 mm deep, and the mounting width is 206 mm to clear the keyhole hooks. Connections are via screw terminals accepting 0.08 to 4 mm² wire for the positive and negative battery leads.","metaTitle":"Siemens 6EP1935-6ME21 Battery Module, 7 Ah, 12 Cells, UL/CSA","metaDescription":"Siemens 6EP1935-6ME21 lead-acid battery module, 7 Ah capacity, 12 cells. UL 1778 recognized, DNV GL/ABS shipbuilding approved. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Supplies"],"specifications":{"ATEX":"No","title":"6EP1935-6ME21","DNV GL":"Yes","Typical":"capacity falls to 80 % of original capacity (according to EUROBAT)","CE marking":"Yes","UL approval":"Yes","description":"SITOP battery module 24 V/7 Ah with maintenance free sealed lead batteries for SITOP DC UPS module 6 A, 15 A and 40 A *Ex approval no longer available*","EAC approval":"Yes","Wall Mounting":"Yes","During Storage":"-20 ... +50 °C","Mounting Height":"188 mm","Number Of Cells":"12","lifecycle_stage":"current","Battery Capacity":"7 A·h","During Operation":"-15 ... +50 °C","During Transport":"-20 ... +50 °C","Fastening Method":"can be screwed onto flat surface (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":"4 a","at 30 °C typical":"2 a","at 40 °C typical":"1 a","at 50 °C typical":"0.5 a","Installation Width":"206 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":"28.4 V","For Power Supply Unit":"1 screw terminal each for 0.08 ... 4 mm² for + BAT and - BAT","Shipbuilding Approval":"ABS, DNV GL","at 10 °C recommended":"27.8 V","at 20 °C recommended":"27.3 V","at 30 °C recommended":"26.8 V","at 40 °C recommended":"26.6 V","at 50 °C recommended":"26.3 V","Depth Of The Enclosure":"121 mm","Standard Rail Mounting":"No","Width Of The Enclosure":"186 mm","at -10 °C recommended":"29 V","Height Of The Enclosure":"168 mm","Charging Current Maximum":"1.75 A","Product Component Included":"Accessories pack with solid-state circuitry fuse 20 A and 30 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 20 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":"$116.84","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/adc61ee22d87db3f71f13c08112af168.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=183835&mlfb=6EP1935-6ME21"},"ai":{"faq":[{"question":"What approvals does the 6EP1935-6ME21 carry?","answer":"It carries CE, UL (cURus recognized to UL 1778 and CSA C22.2 No. 107.1), EAC, and shipbuilding approvals from ABS and DNV GL. It is not ATEX rated."},{"question":"What is the service life of this battery at typical operating temperatures?","answer":"Service life is temperature-dependent: 4 years at 20 °C, 2 years at 30 °C, 1 year at 40 °C, and 0.5 years at 50 °C. Mount it in a cool part of the cabinet to maximize lifespan."},{"question":"Can the 6EP1935-6ME21 be mounted on a DIN rail?","answer":"No, it does not support S7 rail mounting or standard DIN-rail mounting. It fastens to a flat surface using keyhole slots for M4 screws."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP1935-6ME21","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/6EP1935-6ME21 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}}