{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP4438-7EB00-3DX0","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP4438-7EB00-3DX0","canonicalUrl":"https://aoctrl.com/siemens/6EP4438-7EB00-3DX0","factsUrl":"https://aoctrl.com/api/mcp/products/6EP4438-7EB00-3DX0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP buffer module, 8 outputs, 24 VDC input, 45 mm wide, 98% efficiency, IP20, DIN-rail mount.","salesMarkdown":"The Siemens 6EP4438-7EB00-3DX0 is an 8-output buffer module that bridges short supply interruptions on a 24 VDC control bus. It snaps onto a DIN rail EN 60715 35x7.5/15 and takes up 45 mm of panel width — one standard slot. Input range is 20.4 to 30 VDC; output is a controlled DC voltage following Vin minus roughly 0.2 V, so downstream loads see a clean rail during a sag or dropout. Efficiency sits at 98 %, meaning almost no heat to shed inside the cabinet. That lets you pack it tighter without worrying about derating from adjacent gear. The 8 outputs are push-in terminals accepting 0.5 to 4 mm² — standard for 24 V distribution to sensors, PLC I/O, or contactor coils. The 8 outputs aren't just parallel breakers — they connect sequentially after ramp-up above 20 V, with a delay selectable via DIP switch (25 ms, 200 ms, 500 ms, or load-optimized). That matters when you're feeding capacitive loads or multiple drives that would otherwise all hit the bus at once. The remote reset input (non-isolated, high > 15 V) lets a PLC re-enable outputs after a fault without a site visit. Current limitation is set at 1.5× the configured value, with a fast trip (typ. 100 ms) for hard shorts and a slower curve (1.0–1.5×, ~5 s) for overloads. Immediate switch-off under 20 V input (0.5 ms) protects the bus from brownout conditions. MTBF at 40 °C is 363,000 hours — roughly 41 years — so this module isn't the weak link in the panel. The module carries CE, UL (UL 2367 recognized, file E328600; cULus listed to UL 508 and CSA C22.2 No. 107.1, file E197259), CSA (C22.2 60950-1), and EAC approvals. Safety is per EN 60950-1 and EN 50178. EMC emission meets EN 61000-6-3; immunity meets EN 61000-6-2. That covers most industrial and commercial installations in North America, Europe, and the EAEU without extra filtering.","metaTitle":"Siemens 6EP4438-7EB00-3DX0 8-output buffer module, 98% effic","metaDescription":"Siemens 6EP4438-7EB00-3DX0 buffer module, 8 outputs, 98% efficiency, 24 VDC input, DIN-rail mount. UL/cUL recognized. Current-production part sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["DIN Rail Power Supplies"],"specifications":{"Top":"45 mm","ATEX":"No","Left":"0 mm","IECEx":"No","Right":"0 mm","Bottom":"45 mm","At Input":"24V1, 24V2: push-in for 0.5 ... 16 mm²; 0V1, 0V2: push-in for 0.5 ... 4 mm²","At Output":"1 - 8: push-in for 0.5 ... 4 mm²","CE marking":"Yes","UL approval":"Yes; UL-Recognized (UL 2367) File E328600; cULus-Listed (UL 508, CSA C22.2 No. 107.1) File E197259","CSA approval":"Yes; CSA 22.2 60950-1","EAC approval":"Yes","During Storage":"-40 ... +85 °C","MTBF at 40 °C":"363 000 h","Mounting Height":"225 mm","lifecycle_stage":"current","During Operation":"-25 ... +70 °C; with natural convection","During Transport":"-40 ... +85 °C","Fastening Method":"Snaps onto DIN rail EN 60715 35x7.5/15","Number Of Outputs":"8","Other Information":"Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)","Installation Width":"45 mm","Standard For Safety":"according to EN 60950-1 and EN 50178","input voltage at DC":"20.4 ... 30 V","protection class IP":"IP20","Efficiency In Percent":"98 %","For Signaling Contact":"13, 14: push-in for 0.2 ... 1.5 mm²","Of The Excess Current":"Iout = 1.0 ...1.5 x set value, switch-off after approx. 5 s","Remote Reset Function":"Non-electrically isolated 24 V input (signal level \"high\" at > 15 V)","Depth Of The Enclosure":"125 mm","For Auxiliary Contacts":"RST: push-in for 0.2 ... 1.5 mm²","Width Of The Enclosure":"45 mm","Height Of The Enclosure":"135 mm","Voltage Curve At Output":"controlled DC voltage","For Emitted Interference":"EN 61000-6-3","For Interference Immunity":"EN 61000-6-2","Of The Current Limitation":"Iout = 1.5 x set value, switch-off after typ. 100 ms","Formula For Output Voltage":"Vin - approx. 0.2 V","Type Of Outputs Connection":"Connection of all outputs after ramp-up of the supply voltage > 20 V; delay time of 25 ms, 200 ms, 500 ms or \"load-optimized\" can be set via DIP switch for sequential connection","Of The Immediate Switch-Off":"Iout > set value and Vin < 20 V, switch-off after approx. 0.5 ms","Fuse Protection Type At Input":"15 A per output (not accessible)","Type Of Electrical Connection":"Push-in","Type Of Response Value Setting":"via potentiometer","Overvoltage Overload Capability":"35 V","Type Of The Power Supply Network":"Controlled DC voltage","supply voltage at DC rated value":"24 V","Operating Resource Protection Class":"Class III","Display Version For Normal Operation":"Three-color LED per output: green LED for \"Output switched through\"; yellow LED for \"Output switched off manually\"; red LED for \"Output switched off due to overcurrent\"","Product Feature Parallel Switching Of Outputs":"Yes","environmental category according to IEC 60721":"climate class 3K3, 5 … 95% without condensation","Design Of The Reset Device/Resetting Mechanism":"via sensor per output","Relative Overall Tolerance Of The Voltage Note":"In accordance with the supplying input voltage","output current up to 60 °C per output rated value":"10 A","input current at rated input voltage 24 V rated value":"60 A","Design Of The Switching Contact For Signaling Function":"Floating common signal contact or status signal output (pulse/pause signal that can be evaluated via SIMATIC function block)","Galvanic Isolation Between Input And Output At Switch-Off":"No","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"2 ... 10 A","power loss [W] at rated output voltage for rated value of the output current typical":"18 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$169.74","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/860d76d3da612063563453a22345931e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1353678&mlfb=6EP4438-7EB00-3DX0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6EP4438-7EB00-3DX0/alternatives.json"},"ai":{"faq":[{"question":"What approvals does this module carry?","answer":"CE, UL (UL 2367 recognized, cULus listed to UL 508 and CSA C22.2 No. 107.1), CSA (C22.2 60950-1), and EAC. Safety per EN 60950-1 and EN 50178."},{"question":"What is the input voltage range and output characteristic?","answer":"Input is 20.4 to 30 VDC. Output is a controlled DC voltage equal to Vin minus roughly 0.2 V, so it tracks the input rail closely."},{"question":"How do the 8 outputs connect?","answer":"All outputs connect after the supply voltage ramps above 20 V, with a selectable delay (25 ms, 200 ms, 500 ms, or load-optimized) via DIP switch for sequential connection. Terminals are push-in, accepting 0.5 to 4 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP4438-7EB00-3DX0","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/6EP4438-7EB00-3DX0 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}}