{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP3437-8UB00-0AY0","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP3437-8UB00-0AY0","canonicalUrl":"https://aoctrl.com/siemens/6EP3437-8UB00-0AY0","factsUrl":"https://aoctrl.com/api/mcp/products/6EP3437-8UB00-0AY0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP power supply, 6EP3437-8UB00-0AY0, 40 A rated, 94% efficiency, IP20, DIN rail mount.","salesMarkdown":"The Siemens 6EP3437-8UB00-0AY0 is a SITOP modular power supply rated for 40 A continuous output, with a 94% efficiency at rated load. It accepts a three-phase input of 400–500 V AC, 45–65 Hz, and delivers a safety extra-low voltage output (SELV) per EN 60950-1 and EN 50178. The 40 A rating holds over 0 to +60 °C ambient; above that, derate 4% per Kelvin up to +70 °C. That means full output up to 60 °C, then linear reduction — plan your thermal budget accordingly if the cabinet runs hot. The unit is UL 508 and CSA C22.2 No. 107.1 listed (File E197259), so it qualifies for North American panel builds without a separate evaluation. Input protection requires a 3-pole miniature circuit breaker, 10–16 A characteristic C, or a specific Siemens breaker (3RV2011-1DA10 or 3RV2711-1DD10 for UL 489). Mounts on DIN rail EN 60715 35x15 mm. Input terminals accept 0.5–4 mm² single-core or finely stranded wire (one screw terminal per phase, L2, L3, and PE). Output side: two screw terminals for + (0.5–16 mm²) and three for – (0.5–16 mm²), giving flexibility for parallel feeds or larger cable. Clearance: 40 mm top and bottom, 0 mm left and right — so it can sit tight against adjacent devices side-to-side, but needs breathing space above and below for convection cooling.","metaTitle":"Siemens 6EP3437-8UB00-0AY0 Power Supply, 40 A, 94% Efficienc","metaDescription":"Siemens 6EP3437-8UB00-0AY0 power supply, 40 A rated, 94% efficiency, UL/CSA listed, active production. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["DIN Rail Power Supplies"],"specifications":{"Top":"40 mm","ATEX":"No","Left":"0 mm","IECEx":"No","Right":"0 mm","title":"6EP3437-8UB00-0AY0","Bottom":"40 mm","DNV GL":"Yes","Maximum":"1 mA","Typical":"0.6 mA","At Input":"L1, L2, L3, PE: 1 screw terminal each for 0.5 ... 4 mm² single-core/finely stranded","At Output":"+: 2 screw terminals each for 0.5 ... 16 mm²; -: 3 screw terminals each for 0.5 ... 16 mm²","CE marking":"Yes","NEC Class 2":"No","Rated Range":"0 ... 40 A; +60 ... +70 °C: Derating 4%/K","Rated Value":"40 A","UL approval":"Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1)","description":"SITOP PSU3800 24 V/30-40 A stabilized power supply input: 400-500 V 3 AC output: 24 V DC/30-40 A suitable for battery charging *Ex approval no longer available*","CSA approval":"Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1)","EAC approval":"Yes","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","In The Feeder":"Required: 3-pole connected miniature circuit breaker 10 ... 16 A characteristic C or circuit breaker 3RV2011-1DA10 (setting 3 A) or 3RV2711-1DD10 (UL 489)","Initial Value":"320 V","During Storage":"-40 ... +85 °C","Line Frequency":"45 ... 65 Hz","MTBF at 40 °C":"517 015 h","FM registration":"No","lifecycle_stage":"current","During Operation":"-25 ... +70 °C; With natural convection","During Transport":"-40 ... +85 °C","Fastening Method":"Snaps onto DIN rail EN 60715 35x15","Full-Scale Value":"575 V","I2t value maximum":"2.24 A²·s","Other Information":"Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)","ULhazloc approval":"No","Galvanic Isolation":"Safety extra-low output voltage Uout acc. to EN 60950-1 and EN 50178","Maximum Rated Value":"500 V","Minimum Rated Value":"400 V","protection class IP":"IP20","Bridging Of Equipment":"Yes; switchable characteristic","Efficiency In Percent":"94 %","Shipbuilding Approval":"DNV GL","Depth Of The Enclosure":"150 mm","Electrical Accessories":"Buffer module","For Auxiliary Contacts":"13, 14 (alarm signal), 15, 16 (Remote): 1 screw terminal each for 0.05 ... 2.5 mm²","Mechanical Accessories":"Device identification label 20 mm × 7 mm, TI-grey 3RT2900-1SB20","Response Delay Maximum":"0.1 s","Width Of The Enclosure":"135 mm","Height Of The Enclosure":"145 mm","Voltage Curve At Output":"Controlled, isolated DC voltage","For Emitted Interference":"EN 55022 Class B","Nippon Kaiji Kyokai (NK)":"No","Type Of Signal At Output":"Relay contact (NO contact, rating 60 V DC/ 0.3 A) for \"24 V OK\"","Adjustable Output Voltage":"24 ... 28 V","For Interference Immunity":"EN 61000-6-2","cCSAus, Class 1, Division 2":"No","at rated input voltage 400 V":"2.1 A","at rated input voltage 500 V":"1.7 A","Supplied Active Power Typical":"960 W","Type Of Electrical Connection":"screw-type terminals","at output 1 at DC rated value":"24 V","For Mains Harmonics Limitation":"EN 61000-3-2","Type Of Output Voltage Setting":"via potentiometer; max. 960 W","Design Of Input Wide Range Input":"Yes","During NO-Load Operation Maximum":"4 W","Type Of The Power Supply Network":"3-phase AC","output voltage at DC rated value":"24 V","Lloyds Register of Shipping (LRS)":"No","Design Of Short-Circuit Protection":"Constant current characteristic approx. 44 A","On Slow Fluctuation Of Ohm Loading":"0.2 %","Operating Resource Protection Class":"Class I","Design Of The Overvoltage Protection":"< 31.8 V","Display Version For Normal Operation":"Green LED for 24 V OK","On Slow Fluctuation Of Input Voltage":"0.1 %","French marine classification society (BV)":"No","Relative Overall Tolerance Of The Voltage":"3 %","Operating Condition Of The Mains Buffering":"at Vin = 400 V","Product Function Output Voltage Adjustable":"Yes","Property Of The Output Short-Circuit Proof":"Yes","Galvanic Isolation Between Input And Output":"Yes","American Bureau of Shipping Europe Ltd. (ABS)":"No","environmental category according to IEC 60721":"Climate class 3K3, 5 … 95% no condensation","Display Version For Overload And Short Circuit":"LED yellow for \"overload\", LED red for \"latching shutdown\"","On Short-Circuiting During The Start-Up Typical":"48 A","Behavior Of The Output Voltage When Switching On":"minimal overshoot (< 3 %)","current limitation of inrush current at 25 °C maximum":"13 A","Product Feature Of The Enclosure Housing Can Be Lined Up":"Yes","At Rated Output Voltage For Rated Value Of The Output Current Typical":"66 W","Number Of Parallel-Switched Equipment Resources For Increasing The Power":"2","Buffering Time For Rated Value Of The Output Current In The Event Of Power Failure Minimum":"10 ms","Relative Control Precision Of The Output Voltage With Rapid Fluctuation Of The Input Voltage By +/- 15% Typical":"1 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$289.56 – $712.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bf383fc437904e693ba1786c54ba30b1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1108809&mlfb=6EP3437-8UB00-0AY0"},"ai":{"faq":[{"question":"What approvals does the 6EP3437-8UB00-0AY0 carry?","answer":"It carries CE marking, UL/cULus listing (UL 508, CSA C22.2 No. 107.1), cCSAus (CSA C22.2 No. 60950-1, UL 60950-1), EAC approval, and DNV GL marine type approval."},{"question":"What is the required upstream protection for this power supply?","answer":"The feeder requires a 3-pole miniature circuit breaker 10–16 A characteristic C, or a Siemens circuit breaker 3RV2011-1DA10 (setting 3 A) or 3RV2711-1DD10 (UL 489)."},{"question":"What is the operating temperature range and derating?","answer":"Operating range is -25 to +70 °C with natural convection. Full 40 A output is available from 0 to +60 °C; above 60 °C, derate 4% per Kelvin up to +70 °C."},{"question":"Does the 6EP3437-8UB00-0AY0 have ATEX or IECEx approval?","answer":"No, ATEX and IECEx approvals are not listed for this unit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP3437-8UB00-0AY0","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/6EP3437-8UB00-0AY0 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}}