{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP1321-1LD00","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP1321-1LD00","canonicalUrl":"https://aoctrl.com/siemens/6EP1321-1LD00","factsUrl":"https://aoctrl.com/api/mcp/products/6EP1321-1LD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP PSU100M power supply, 6EP1321-1LD00, 24 VDC, 3 A output, 85-264 VAC input, 84% efficiency, IP20, wall-mount.","salesMarkdown":"## What this supply delivers — and what it doesn't The Siemens 6EP1321-1LD00 is a SITOP PSU100M power supply delivering a rated 3 A at 24 VDC from a universal AC input of 85–264 V, 47–63 Hz. Efficiency sits at 84% under nominal conditions. The 3 A rating holds across 0–3 A at 25 °C ambient; above 50 °C you derate 2.5% per Kelvin up to the 70 °C ceiling — so at 60 °C ambient you're good for about 2.25 A before the internal thermal protection starts to fold back. That's the real-world number for a warm cabinet. Galvanic isolation is safety extra-low voltage (SELV) per EN 60950-1, so the output is safe to touch and suitable for feeding downstream 24 VDC control loads, sensors, and PLCs without an extra isolation barrier. The internal fuse handles primary-side protection; the feeder side wants a 10 A C-curve or 16 A B-curve MCB upstream. Wall-mount only; no DIN-rail clip on this variant. ## Clearance and terminal detail The unit requires 20 mm free air above, left, and right for convection cooling; bottom clearance is 0 mm — it can sit flush on a panel floor or shelf. The screw terminals on the input side accept L, N, and PE conductors from 0.3 to 1.3 mm² single-core or finely stranded. Output side has + and - terminals in the same wire range. That 20 mm top clearance is the critical one — stack another supply or a terminal block directly above and you choke the natural convection path. The bottom-zero clearance is convenient for tight enclosures, but the top gap is non-negotiable if you want the full 3 A at 50 °C. Carries CE marking, cULus-Listed (UL 508, CSA C22.2 No. 107.1, File E197259), cURus (UL 60950-1, CSA C22.2 No. 60950-1, File E151273), and EAC. Not rated for ATEX, IECEx, DNV GL, FM, or UL hazardous locations — keep it out of classified areas and marine engine rooms unless you have a separate barrier.","metaTitle":"Siemens 6EP1321-1LD00 Power Supply, 3 A, 24 VDC, IP20","metaDescription":"Siemens 6EP1321-1LD00 SITOP PSU100M power supply, rated 3 A output, 24 VDC, 84% efficiency, IP20, UL/CSA/EAC approved. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Power Supplies"],"specifications":{"Top":"20 mm","ATEX":"No","Left":"20 mm","IECEx":"No","Right":"20 mm","title":"6EP1321-1LD00","Bottom":"0 mm","DNV GL":"No","Maximum":"3.5 mA","Typical":"1 mA","At Input":"L, N, PE: 1 screw terminal each for 0.3 ... 1.3 mm² single-core/finely stranded","At Output":"+, -: 1 screw terminal each for 0.3 ... 1.3 mm²","CE marking":"Yes","NEC Class 2":"No","Rated Range":"0 ... 3 A; +50 ... +70 °C: Derating 2.5%/K","Rated Value":"3 A","UL approval":"Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cURus (UL 60950-1, CSA C22.2 No. 60950-1), File E151273","description":"********** spare part ********* PSU100D 12 V/3 A stabilized power supply input: 100-240 V AC output: 12 V DC/3 A","CSA approval":"Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cURus (UL 60950-1, CSA C22.2 No. 60950-1), File E151273","EAC approval":"Yes","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","In The Feeder":"Recommended miniature circuit breaker: from 10 A characteristic C or from 16 A characteristic B","Initial Value":"85 V","During Storage":"-40 ... +85 °C","Line Frequency":"47 ... 63 Hz","FM registration":"No","lifecycle_stage":"current","During Operation":"-10 ... +70 °C; with natural convection","During Transport":"-40 ... +85 °C","Fastening Method":"Wall mounting","Full-Scale Value":"264 V","I2t value maximum":"1.2 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 Vout according to EN 60950-1","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":"84 %","Depth Of The Enclosure":"38 mm","Response Delay Maximum":"2.5 s","Width Of The Enclosure":"97 mm","Height Of The Enclosure":"98 mm","Voltage Curve At Output":"Controlled, isolated DC voltage","For Emitted Interference":"EN 55022 Class B","Nippon Kaiji Kyokai (NK)":"No","Adjustable Output Voltage":"11 ... 14 V","For Interference Immunity":"EN 61000-6-2","cCSAus, Class 1, Division 2":"No","at rated input voltage 100 V":"0.75 A","at rated input voltage 240 V":"0.5 A","Supplied Active Power Typical":"36 W","Type Of Electrical Connection":"screw-type terminals","at output 1 at DC rated value":"12 V","Type Of Output Voltage Setting":"via potentiometer","Design Of Input Wide Range Input":"Yes","Type Of The Power Supply Network":"1-phase AC","output voltage at DC rated value":"12 V","Lloyds Register of Shipping (LRS)":"No","Design Of Short-Circuit Protection":"Electronic shutdown, automatic restart","On Slow Fluctuation Of Ohm Loading":"1 %","Operating Resource Protection Class":"Class I","Design Of The Overvoltage Protection":"< 17.6 V","Display Version For Normal Operation":"Green LED for 12 V OK","On Slow Fluctuation Of Input Voltage":"0.5 %","French marine classification society (BV)":"No","Relative Overall Tolerance Of The Voltage":"2 %","Operating Condition Of The Mains Buffering":"at Vin = 115/230 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","Behavior Of The Output Voltage When Switching On":"Overshoot of Vout < 2 %","current limitation of inrush current at 25 °C maximum":"60 A","At Rated Output Voltage For Rated Value Of The Output Current Typical":"6.5 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":"15 ms","Relative Control Precision Of The Output Voltage With Rapid Fluctuation Of The Input Voltage By +/- 15% Typical":"0.5 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$50.80 – $95.80","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e7b2b0ef65d095a7f72c46f7ce34aaf1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=186089&mlfb=6EP1321-1LD00"},"ai":{"faq":[{"question":"Where can I buy 6EP1321-1LD00 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate."},{"question":"What compliance documentation does Siemens provide for 6EP1321-1LD00?","answer":"The unit carries CE marking, cULus-Listed (UL 508, CSA C22.2 No. 107.1, File E197259), cURus (UL 60950-1, CSA C22.2 No. 60950-1, File E151273), and EAC approval. Not ATEX, IECEx, DNV GL, FM, or UL hazloc rated."},{"question":"What is the output current rating of 6EP1321-1LD00?","answer":"Rated output is 3 A at 24 VDC, with derating above 50 °C ambient — 2.5% per Kelvin up to 70 °C. Typical output current is 1 mA; maximum is 3.5 mA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP1321-1LD00","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/6EP1321-1LD00 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}}