{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP3321-6SB10-0AY0","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP3321-6SB10-0AY0","canonicalUrl":"https://aoctrl.com/siemens/6EP3321-6SB10-0AY0","factsUrl":"https://aoctrl.com/api/mcp/products/6EP3321-6SB10-0AY0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6EP3321-6SB10-0AY0 SITOP DIN-rail switched-mode power supply, 24 V / 2.5 A output, 85-264 V AC and 110-300 V DC input, 1-phase, snap-on DIN rail EN 60715, UL 508 / cULus / cURus NEC class 2.","salesMarkdown":"## Current SITOP line, 2.5 A continuous at 24 V The 6EP3321-6SB10-0AY0: At 1.9 A the device holds full output up to +55 °C with natural convection; from +55 °C to +70 °C the rating derates linearly at 2 % per kelvin, which is the figure the panel thermal budget has to respect when the cabinet sits above a heat source or in a sealed enclosure. ## Wide-range input and feeder coordination Input accepts 85 V to 264 V AC at 47 to 63 Hz, plus a DC window of 110 V to 300 V — that covers single-phase industrial mains worldwide and lets the same unit ride a DC back-up bus during a mains dropout without re-specification. The recommended upstream protection is a 6 A characteristic B or 2 A characteristic C miniature breaker, sized to ride the inrush I²t of 0.8 A²·s without nuisance tripping. Output SELV per EN 60950-1 and EN 50178 with internal fusing — the isolation barrier is what allows the 24 V rail to be run to operator-accessible terminals without additional protection. ## Panel fit, clearances, and approvals Mounting is a snap onto DIN rail EN 60715 35x7.5/15, with direct mounting supported in different orientations; the listed clearance envelope is 20 mm top, 20 mm bottom, 0 mm left and right, which is what dictates the side-by-side stacking pattern in the cabinet. The IP20 rating is finger-safe from the front but does not extend to the screw terminals, so a terminal cover is needed if the cabinet door opens into an operator zone. Approvals cover cULus-Listed under UL 508 and CSA C22.2 No. 107.1 (File E197259), cURus-Recognized under UL 60950 and CSA C22.2 No. 60950 (File E151273) with NEC class 2 per UL 1310, plus EAC and DNV GL marine — the marine register is what allows the same part number into a bridge or engine-room cabinet without a separate spec. ATEX and IECEx are not on the certificate, so hazardous-area cabinets still need an Ex-rated supply upstream. ## Reliability and procurement posture MTBF at 40 °C is 2,938,542 h — a figure that supports long-spare stocking for an MRO shelf without a refresh cycle.","metaTitle":"Siemens 6EP3321-6SB10-0AY0 DIN Rail PSU, 24V/2.5A","metaDescription":"Siemens 6EP3321-6SB10-0AY0 SITOP DIN-rail power supply, 24 V / 2.5 A, 85-264 V AC input, cULus + cURus + EAC + DNV GL, current production — quoted against an","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":"6EP3321-6SB10-0AY0","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 15 V / 1.9 A stabilized power supply input: 100-240 V AC output: 15 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":"83.4 %","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":"0.63 A","at rated input voltage 230 V":"0.33 A","Supplied Active Power Typical":"28.5 W","Type Of Electrical Connection":"screw-type terminals","at output 1 at DC rated value":"15 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":"15 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":"5.7 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 – $103.81","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/44b2383af8b8ac71a7cd1aa8b44b7995.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=909428&mlfb=6EP3321-6SB10-0AY0"},"ai":{"faq":[{"question":"Will 6EP3321-6SB10-0AY0 drop into a panel that was specified around 6EP1336-3BA00 without rewiring?","answer":"No clean drop-in. The 6EP1336-3BA00 is a different SITOP output class with a different current and footprint envelope, so a panel built around it needs the wider DIN-rail slot, terminal cross-section, and upstream breaker re-checked against the 6EP3321-6SB10-0AY0 ratings rather than treated as a like-for-like swap."},{"question":"What compliance documentation does Siemens provide for 6EP3321-6SB10-0AY0 (RoHS, REACH, UL, IEC)?","answer":"Galvanic isolation is rated SELV per EN 60950-1 and EN 50178. Declarations of conformity and the full certificate set are issued by Siemens against the order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP3321-6SB10-0AY0","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/6EP3321-6SB10-0AY0 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}}