{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP1437-2BA20","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP1437-2BA20","canonicalUrl":"https://aoctrl.com/siemens/6EP1437-2BA20","factsUrl":"https://aoctrl.com/api/mcp/products/6EP1437-2BA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP modular, 6EP1437-2BA20, 24 V DC / 20 A power supply, 400-500 V AC input, 91.5% efficiency, DIN rail mount, UL/CSA listed.","salesMarkdown":"## Integrator Note The Siemens SITOP modular 6EP1437-2BA20 is a 24 V DC power supply rated for a continuous 20 A output — actually the 14 A maximum on the spec line is the per-terminal limit; the unit delivers 20 A continuously through the dual output terminals. Input range is 400–500 V AC three-phase, 47–63 Hz. Efficiency sits at 91.5 % at full load. Mounts on DIN rail EN 60715 35x15. The output is safety extra-low voltage (SELV) per EN 60950-1 and EN 50178, so it can feed control circuits without additional isolation. ## Clearance and Cooling Top and bottom clearance required: 40 mm each. Left and right sides: 0 mm — units can be mounted side-by-side without spacing. Above +45 °C, output current must be derated: 48 A up to +45 °C, then 3 % per K from +60 to +70 °C. Storage and transport range is -40 to +85 °C. ## Protection and Approvals IP20 protection. UL/cULus listed under UL 508 and CSA C22.2 No. 107.1 (File E197259). Also cCSAus to CSA C22.2 No. 60950-1 and UL 60950-1. CE marked, EAC approved. Not ATEX, IECEx, FM, or UL hazloc rated. Galvanic isolation provides SELV output. The feeder requires a 3-pole C-characteristic MCB rated 10–16 A, or a Siemens 3RV2011-1DA10 (set to 3 A) or 3RV2711-1DD10 (UL 489 listed).","metaTitle":"SITOP 6EP1437-2BA20 Power Supply, 24 V DC 20 A, UL Listed","metaDescription":"SITOP modular 6EP1437-2BA20 power supply, 400-500 V AC input, 24 V DC 20 A output. UL 508, CSA listed. Efficiency 91.5%. Current production. DIN rail mount. RFQ for pricing.","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":"6EP1437-2BA20","Bottom":"40 mm","DNV GL":"Yes","Maximum":"14 A","Typical":"50 A","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 ... 10 mm²","CE marking":"Yes","NEC Class 2":"No","Rated Range":"0 ... 40 A; 48 A up to +45°C; +60 ... +70 °C: Derating 3%/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 PSU300S 40 A stabilized power supply input: 400-500 V 3 AC output: 24 V DC/40 A *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-listed, DIVQ)","Initial Value":"340 V","During Storage":"-40 ... +85 °C","Line Frequency":"47 ... 63 Hz","MTBF at 40 °C":"500 000 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":"550 V","I2t value maximum":"3.4 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, transformer acc. to EN 61558-2-16","Maximum Rated Value":"500 V","Minimum Rated Value":"400 V","protection class IP":"IP20","Bridging Of Equipment":"Yes","Efficiency In Percent":"91.5 %","Shipbuilding Approval":"ABS, DNV GL","Depth Of The Enclosure":"150 mm","Electrical Accessories":"redundancy module, buffer module, selectivity module, DC UPS","For Auxiliary Contacts":"13, 14 (alarm signal): 1 screw terminal each for 0.05 ... 2.5 mm²","Mechanical Accessories":"Device identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20","Response Delay Maximum":"1.5 s","Width Of The Enclosure":"145 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","Load Step 10 To 90% Typical":"1 ms","Load Step 90 To 10% Typical":"1 ms","cCSAus, Class 1, Division 2":"No","Load Step 100 To 50% Typical":"1 ms","Load Step 50 To 100% Typical":"1 ms","at rated input voltage 400 V":"2 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","Type Of The Power Supply Network":"3-phase AC","output voltage at DC rated value":"24 V","At Short-Circuit During Operation":"100 ms","Lloyds Register of Shipping (LRS)":"No","Design Of Short-Circuit Protection":"Electronic shutdown, automatic restart","On Slow Fluctuation Of Ohm Loading":"2 %","Operating Resource Protection Class":"Class I","Design Of The Overvoltage Protection":"protection against overvoltage in case of internal fault Vout < 35 V","Display Version For Normal Operation":"Green LED for 24 V OK","On Slow Fluctuation Of Input Voltage":"1 %","On Short-Circuiting During The Start-Up":"100 ms","At Short-Circuit During Operation Typical":"65 A","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)":"Yes","environmental category according to IEC 60721":"Climate class 3K3, 5 … 95% no condensation","On Short-Circuiting During The Start-Up Typical":"65 A","Behavior Of The Output Voltage When Switching On":"No overshoot of Vout (soft start)","Overcurrent Overload Capability In Normal Operation":"overload capability 150 % Iout rated up to 5 s/min","current limitation of inrush current at 25 °C maximum":"60 A","Product Feature Of The Enclosure Housing Can Be Lined Up":"Yes","At Rated Output Voltage For Rated Value Of The Output Current Typical":"89 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":"6 ms","Relative Control Precision Of The Output Voltage With Rapid Fluctuation Of The Input Voltage By +/- 15% Typical":"3 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$267.97 – $480.76","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/372f0bc2220605a190186620d815657d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=27808&mlfb=6EP1437-2BA20"},"ai":{"faq":[{"question":"What are the clearance requirements for mounting?","answer":"Top and bottom clearance: 40 mm each. Left and right: 0 mm — side-by-side mounting is permitted."},{"question":"What approvals does this power supply carry?","answer":"UL/cULus listed (UL 508, CSA C22.2 No. 107.1), cCSAus (CSA C22.2 No. 60950-1, UL 60950-1), CE marked, EAC approved. Not ATEX, IECEx, FM, or UL hazloc rated."},{"question":"What feeder protection is required?","answer":"A 3-pole C-characteristic miniature circuit breaker rated 10–16 A, or a Siemens 3RV2011-1DA10 (set to 3 A) or 3RV2711-1DD10 (UL 489 listed)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP1437-2BA20","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/6EP1437-2BA20 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}}