{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP3321-6SB00-0AY0","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP3321-6SB00-0AY0","canonicalUrl":"https://aoctrl.com/siemens/6EP3321-6SB00-0AY0","factsUrl":"https://aoctrl.com/api/mcp/products/6EP3321-6SB00-0AY0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6EP3321-6SB00-0AY0 SITOP lite DIN-rail power supply, 24 V, 2.5 A, AC 100-240 V / DC 110-300 V input, snap-on EN 60715 mount.","salesMarkdown":"## SITOP lite, 24 V at 2.5 A — what the headline ratings decide Siemens 6EP3321-6SB00-0AY0 is a DIN-rail switch-mode power supply in the SITOP lite line, delivering 24 V at a rated 1.9 A with a maximum 2.5 A ceiling; the 2.5 A figure is the short-term headroom, and the continuous 1.9 A number is the one that drives the load calculation on the panel drawing. Above +55 °C ambient the output derates 2 % per kelvin, so a cabinet above the rated temperature loses 0.05 A per degree — sizing matters for sealed enclosures and machine-side cabinets with no active ventilation. Operation is rated -25... +70 °C with natural convection, meaning no fan service interval to plan around; storage and transport envelope extends to -40... +85 °C for spares staged in unconditioned stockrooms. ## Wide-range input and the weak-grid margin AC input covers 100... 240 V rated, full-scale 85... 264 V, with DC input 110... 300 V for battery-backed or DC-bus-fed cabinets — the 85 V lower bound keeps the PSU running through brownout events that would drop lesser supplies. Line frequency is 47... 63 Hz rated at 50 Hz / 60 Hz, so the unit tolerates portable generator sets and shipboard 60 Hz mains without reconfiguration. Internal fusing is fitted; upstream protection calls for a 6 A characteristic B or 2 A characteristic C miniature circuit breaker in the feeder. ## Output wiring and terminal envelope Output is safety extra-low voltage per EN 60950-1 and EN 50178 and is NEC Class 2 compliant — the rating limit that lets the 24 V rail land directly on Class 2 field devices without an extra isolating barrier. ## Panel clearance, stacking, and reliability budget Snap-on fastening to DIN rail EN 60715 35x7.5/15 is supported, with direct mounting in different mounting positions — clearance envelope is 20 mm top and bottom, 0 mm left and right, so adjacent SITOP units can be butted side-by-side without thermal penalty. MTBF is 2 938 542 h at 40 °C — the figure panel builders carry into the reliability block of the project FMEA; I²t maximum is 0.8 A²·s, the inrush budget the upstream breaker characteristic must accommodate. ## Approvals — where the supply lands without paperwork fights The unit carries CE marking, EAC approval, and DNV GL marine approval — panel builders specifying into shipboard or EAC-supervised cabinets do not need a separate deviation request. ATEX, IECEx, FM, and UL hazloc approvals are not on the listing — for Zone-classified or hazardous-location cabinets a different SITOP variant is required, not this part number. ## Sourcing posture Lifecycle status reads current, so independent distribution quotes against the BOM; lead time, package quantity, and volume pricing are confirmed at RFQ — no stockholding or immediacy claim is made on the page.","metaTitle":"Siemens 6EP3321-6SB00-0AY0 DIN rail PSU, 24 V / 2.5 A","metaDescription":"Siemens 6EP3321-6SB00-0AY0 SITOP lite DIN-rail power supply, 24 V at 2.5 A, AC 100-240 V / DC 110-300 V input.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["DIN Rail Power Supplies"],"specifications":{"Top":"20 mm","ATEX":"No","Left":"0 mm","IECEx":"No","Right":"0 mm","at DC":"110 ... 300 V","title":"6EP3321-6SB00-0AY0","Bottom":"20 mm","DNV GL":"Yes","Maximum":"2.5 A","Typical":"2.5 A","At Input":"L, N: 1 screw terminal each for 0.5 ... 2.5 mm2 single-core/finely stranded","At Output":"+, -: 1 screw terminal each for 0.5 ... 2.5 mm²","CE marking":"Yes","NEC Class 2":"Yes","Rated Range":"0 ... 1.9 A; +55 ... +70 °C: Derating 2%/K","Rated Value":"1.9 A","UL approval":"Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cURus-Recognized (UL 60950, CSA C22.2 No. 60950), File E151273, NEC class 2 (acc. to UL 1310)","description":"LOGO!Power 12 V / 1.9 A stabilized power supply input: 100-240 V AC output: 12 V DC/ 1.9 A *Ex approval no longer available*","CSA approval":"Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cURus-Recognized (UL 60950, CSA C22.2 No. 60950), File E151273, NEC class 2 (acc. to UL 1310)","EAC approval":"Yes","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","In The Feeder":"Recommended miniature circuit breaker: from 6 A characteristic B or from 2 A characteristic C","Initial Value":"85 V","During Storage":"-40 ... +85 °C","Line Frequency":"47 ... 63 Hz","MTBF at 40 °C":"2 938 542 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 35x7.5/15, direct mounting in different mounting positions","Full-Scale Value":"264 V","I2t value maximum":"0.8 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":"240 V","Minimum Rated Value":"100 V","protection class IP":"IP20","Fuse Protection Type":"internal","Bridging Of Equipment":"Yes","Efficiency In Percent":"81 %","Shipbuilding Approval":"ABS, BV, DNV GL, LRS","Depth Of The Enclosure":"53 mm","Response Delay Maximum":"0.5 s","Width Of The Enclosure":"36 mm","Height Of The Enclosure":"90 mm","Voltage Curve At Output":"Controlled, isolated DC voltage","For Emitted Interference":"EN 55022 Class B","Nippon Kaiji Kyokai (NK)":"No","Adjustable Output Voltage":"10.5 ... 16.1 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","at rated input voltage 120 V":"0.53 A","at rated input voltage 230 V":"0.3 A","Supplied Active Power Typical":"22.8 W","Type Of Electrical Connection":"screw-type terminals","at output 1 at DC rated value":"12 V","Type Of Output Voltage Setting":"via potentiometer","Overvoltage Overload Capability":"300 V AC for 1 s","Design Of Input Wide Range Input":"Yes","During NO-Load Operation Maximum":"0.3 W","Type Of The Power Supply Network":"1-phase AC or DC","output voltage at DC rated value":"12 V","Lloyds Register of Shipping (LRS)":"Yes","Design Of Short-Circuit Protection":"Constant current characteristic","Measuring Point For Output Current":"50 mV =^ 1.9 A","On Slow Fluctuation Of Ohm Loading":"0.1 %","Operating Resource Protection Class":"Class II (without protective conductor)","Design Of The Overvoltage Protection":"Yes, according to EN 60950-1","Display Version For Normal Operation":"Green LED for output voltage OK","On Slow Fluctuation Of Input Voltage":"0.1 %","French marine classification society (BV)":"Yes","Relative Overall Tolerance Of The Voltage":"3 %","Operating Condition Of The Mains Buffering":"at Vin = 187 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","Behavior Of The Output Voltage When Switching On":"No overshoot of Vout (soft start)","Overcurrent Overload Capability When Switching On":"150% Iout rated typ. 200 ms","Overcurrent Overload Capability In Normal Operation":"overload capability 150% Iout rated typ. 200 ms","current limitation of inrush current at 25 °C maximum":"25 A","Product Feature Of The Enclosure Housing Can Be Lined Up":"Yes","At Rated Output Voltage For Rated Value Of The Output Current Typical":"5.3 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":"40 ms","Relative Control Precision Of The Output Voltage With Rapid Fluctuation Of The Input Voltage By +/- 15% Typical":"0.2 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$54.61 – $105.74","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/43d6699f129fb840a7b54612fb938926.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=909427&mlfb=6EP3321-6SB00-0AY0"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 6EP3321-6SB00-0AY0?","answer":"Independent distribution quotes this part to order against the BOM; current pricing and lead time are confirmed at RFQ, not on the page."},{"question":"What compliance documentation does Siemens provide for 6EP3321-6SB00-0AY0?","answer":"ATEX, IECEx, FM, and UL hazloc are not on the listing."},{"question":"What is 6EP3321-6SB00-0AY0's listed top clearance on this DIN rail line?","answer":"Top clearance is 20 mm; bottom is also 20 mm. Left and right are 0 mm, so adjacent units butt side-by-side without thermal penalty."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP3321-6SB00-0AY0","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/6EP3321-6SB00-0AY0 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}}