{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP4438-7FB00-3DX0","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP4438-7FB00-3DX0","canonicalUrl":"https://aoctrl.com/siemens/6EP4438-7FB00-3DX0","factsUrl":"https://aoctrl.com/api/mcp/products/6EP4438-7FB00-3DX0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP PSU8200, 6EP4438-7FB00-3DX0, 24V DC / 20A controlled-output power supply, 98% efficiency, DIN-rail mount, IP20.","salesMarkdown":"The Siemens 6EP4438-7FB00-3DX0 is a SITOP PSU8200 series power supply delivering a controlled 24 V DC output at 20 A from a 20.4–30 V DC input, with 98% efficiency. It snaps onto a DIN rail per EN 60715 35x7.5/15, occupying 45 mm width — a standard single-module slot in most control panels. The output voltage tracks the input minus roughly 0.2 V, so it's a buffer/booster unit rather than an isolated AC-DC converter; think of it as a regulated distribution module for an existing 24 V bus that needs extra current headroom or per-channel protection. Eight push-in outputs (0.5–4 mm²) each have individual electronic overload protection with a defined trip curve: 1.0× set value trips after about 5 s, 1.5× after 1 s, 1.8× after 0.1 s, and 2.0× after roughly 30 ms. Below 20 V input, an immediate switch-off triggers in about 8 ms if output exceeds the set point. A DIP switch selects between 25 ms, 200 ms, 500 ms, or load-optimized staggered startup for the outputs — useful when charging capacitive loads or sequencing field devices to avoid a single large inrush. The enclosure measures 45 mm wide × 135 mm high × 125 mm deep, with a mounting height of 225 mm when snapped onto the DIN rail. IP20 rated, so it's intended for inside a cabinet — no washdown or outdoor exposure. The push-in terminals on the input side accept up to 16 mm² for the main 24 V feeds, while outputs and signaling contacts take up to 4 mm² and 1.5 mm² respectively. A remote reset input (non-isolated, >15 V signal level) lets a PLC or safety relay cycle the outputs after a fault without a manual panel visit. The 98% efficiency means minimal heat dissipation — at full 20 A load, only about 10 W is lost as heat, so it can sit tight against other DIN-rail modules without derating for ambient temperature up to 70 °C (with natural convection). The controlled DC output with electronic overload per channel eliminates the need for individual branch fuses or circuit breakers on each load circuit, saving DIN rail space and wiring time. The 16 A internal fuse per output is not accessible — it's there as a last-resort protection against a hard short, not a serviceable component.","metaTitle":"Siemens 6EP4438-7FB00-3DX0 SITOP PSU8200, 24V 20A, 98% Effic","metaDescription":"Siemens 6EP4438-7FB00-3DX0 SITOP PSU8200 power supply. 24V DC, 20A output, 98% efficiency. UL 508 listed. Active production. Sourced to order against RFQ.","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","title":"6EP4438-7FB00-3DX0","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","description":"SITOP SEL1200 selectivity module 8-channel switching characteristic input: 24 V DC/60 A output: 24 V DC/8 x 10 A threshold adjustable 2-10 A with monitoring interface *Ex approval no longer","CSA approval":"Yes; CSA 22.2 60950-1","EAC approval":"Yes","During Storage":"-40 ... +85 °C","MTBF at 40 °C":"925 000 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 > 2.0 x set value, switch-off after approx. 30 ms, Iout > 1.8 x set value, switch-off after approx. 0.1 s, Iout > 1.5 x set value, switch-off after approx. 1 s, Iout > 1.0 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","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. 8 ms","Fuse Protection Type At Input":"16 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":"$132.08","stockQuantity":0,"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=1353679&mlfb=6EP4438-7FB00-3DX0"},"ai":{"faq":[{"question":"What compliance documentation does this PSU carry?","answer":"It carries CE marking, UL-Recognized (UL 2367) and cULus-Listed (UL 508, CSA C22.2 No. 107.1) approvals, CSA 22.2 60950-1, and EAC approval. Safety standards compliance per EN 60950-1 and EN 50178. EMC emission per EN 61000-6-3 and immunity per EN 61000-6-2."},{"question":"What is the top clearance requirement for this unit?","answer":"The datasheet specifies 45 mm clearance above the unit (Top: 45 mm) and 45 mm below (Bottom: 45 mm), with 0 mm on the left and right sides. This allows side-by-side mounting without gaps."},{"question":"Does this unit have ATEX or IECEx certification?","answer":"No. The evidence lists ATEX as 'No' and IECEx as 'No'. This PSU is not certified for explosive atmospheres and should not be installed in hazardous areas without additional enclosure protection."},{"question":"What is the closest functional second-source for this PSU?","answer":"The 6EP1336-3BA00 is another Siemens SITOP PSU8200 variant, but it's an AC-input unit with different ratings. For a direct DC-input buffer/booster with 8 protected outputs, the 6EP4438-7FB00-3DX0 is the specific order code — there is no identical second-source from another manufacturer that drops in without rewiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP4438-7FB00-3DX0","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/6EP4438-7FB00-3DX0 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}}