{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP1961-2BA11","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP1961-2BA11","canonicalUrl":"https://aoctrl.com/siemens/6EP1961-2BA11","factsUrl":"https://aoctrl.com/api/mcp/products/6EP1961-2BA11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP buffer module, 6EP1961-2BA11, 24 V DC input (22-30 V), 4 outputs, 97% efficiency, DIN rail mount, IP20.","salesMarkdown":"The Siemens 6EP1961-2BA11 is a SITOP buffer module that takes a 24 V DC input (22-30 V range) and delivers four controlled DC voltage outputs, each at Vin minus roughly 0.2 V. Rated efficiency hits 97 %, which means minimal heat loss in the enclosure — important when you're stacking modules in a confined DIN-rail row and relying on natural convection cooling over the -25 to +60 °C operating range. The four outputs each have a screw terminal accepting 0.5-4 mm² wire. An integrated current limitation trips at 1.5× the set value (typ. 100 ms), while an overcurrent protection circuit switches off after roughly 5 seconds at 1.0-1.5× set current. A non-electrically isolated remote reset input (24 V, high above 15 V) lets a PLC or safety relay re-enable the outputs after a fault clears. The enclosure measures 72 mm wide, 80 mm high, and 72 mm deep — a compact footprint that occupies three standard DIN-rail TE (1 TE = 18 mm). Mounting height is listed at 180 mm, which accounts for the required clearance above and below for wiring and airflow. IP20 rated, so it's intended for dry indoor cabinets only — no washdown, no dust ingress protection. The screw terminals on the input side accept 0.5-16 mm² (for the +24 V) and 0.5-4 mm² (for the 0 V), which covers most control-circuit wiring sizes up to about 6 AWG. Safety certifications stack up: UL-Recognized per UL 2367 (File E328600), cULus-Listed per UL 508 and CSA C22.2 No. 107.1 (File E197259), plus CE, EAC, and shipbuilding approvals from DNV GL and ABS. Emissions meet EN 55022 Class B (residential/commercial limits), immunity meets EN 61000-6-2 (industrial environment). Safety construction follows EN 60950-1 and EN 50178. MTBF is 755,915 hours at 40 °C — roughly 86 years of continuous operation. Storage and transport temperature range is -40 to +85 °C.","metaTitle":"Siemens 6EP1961-2BA11 Buffer Module, 24 V DC, 4 Outputs, 97%","metaDescription":"Siemens 6EP1961-2BA11 buffer module, 24 V DC input, 4 outputs, 97% efficiency, DIN rail mount, IP20, UL recognized, CE, EAC, DNV GL approved. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["DIN Rail Power Supplies"],"specifications":{"Top":"50 mm","ATEX":"No","Left":"0 mm","IECEx":"No","Right":"0 mm","Bottom":"50 mm","DNV GL":"Yes","At Input":"+24 V: 2 screw terminals for 0.5 ... 16 mm²; 0 V: 2 screw terminals for 0.5 ... 4 mm²","At Output":"Output 1 ... 4: 1 screw terminal each for 0.5 ... 4 mm²","CE marking":"Yes","UL approval":"Yes; UL-Recognized (UL 2367) File E328600; cULus-Listed (UL 508, CSA C22.2 No. 107.1) File E197259","EAC approval":"Yes","During Storage":"-40 ... +85 °C","MTBF at 40 °C":"755 915 h","Mounting Height":"180 mm","lifecycle_stage":"current","During Operation":"-25 ... +60 °C; with natural convection","During Transport":"-40 ... +85 °C","Fastening Method":"Snaps onto DIN rail EN 60715 35x7.5/15","Number Of Outputs":"4","Other Information":"Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)","Installation Width":"72 mm","Standard For Safety":"according to EN 60950-1 and EN 50178","input voltage at DC":"22 ... 30 V","protection class IP":"IP20","Efficiency In Percent":"97 %","For Signaling Contact":"3 screw terminals for 0.5 ... 4 mm²","Of The Excess Current":"Iout = 1.0 ...1.5 x set value, switch-off after approx. 5 s","Remote Reset Function":"Non-electrically isolated 24 V input (signal level \"high\" at > 15 V)","Shipbuilding Approval":"DNV GL, ABS","Depth Of The Enclosure":"72 mm","For Auxiliary Contacts":"Remote reset: 1 screw terminal for 0.5 ... 4 mm²","Mechanical Accessories":"Device identification label 20 mm × 7 mm, TI-grey 3RT2900-1SB20","Width Of The Enclosure":"72 mm","Height Of The Enclosure":"80 mm","Voltage Curve At Output":"controlled DC voltage","For Emitted Interference":"EN 55022 Class B","For Interference Immunity":"EN 61000-6-2","Of The Current Limitation":"Iout = 1.5 x set value, switch-off after typ. 100 ms","Formula For Output Voltage":"Vin - approx. 0.2 V","Type Of Outputs Connection":"Simultaneous connection of all outputs after power up of the supply voltage > 20 V, delay time of 25 ms, 100 ms or adjustable \"load optimised\" via DIP switch for sequential connection","Of The Immediate Switch-Off":"Iout > set value and Vin < 20 V, switch-off after approx. 0.5 ms","Fuse Protection Type At Input":"5 A per output (not accessible)","Type Of Electrical Connection":"screw-type terminals","Type Of Response Value Setting":"via potentiometer","Overvoltage Overload Capability":"35 V","Type Of The Power Supply Network":"Controlled DC voltage","supply voltage at DC rated value":"24 V","Operating Resource Protection Class":"Class III","Display Version For Normal Operation":"Three-color LED per output: green LED for \"Output switched through\"; yellow LED for \"Output switched off manually\"; red LED for \"Output switched off due to overcurrent\"","Residual Current At Switch-Off Typical":"1 mA","American Bureau of Shipping Europe Ltd. (ABS)":"Yes","Product Feature Parallel Switching Of Outputs":"No","environmental category according to IEC 60721":"climate class 3K3, 5 … 95% without condensation","Design Of The Reset Device/Resetting Mechanism":"via sensor per output","Relative Overall Tolerance Of The Voltage Note":"In accordance with the supplying input voltage","output current up to 60 °C per output rated value":"3 A","input current at rated input voltage 24 V rated value":"12 A","Design Of The Switching Contact For Signaling Function":"Common signal contact (changeover contact, rating 0.1 A/24 V DC)","Galvanic Isolation Between Input And Output At Switch-Off":"No","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.5 ... 3 A","power loss [W] at rated output voltage for rated value of the output current typical":"9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$86.36","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=429666&mlfb=6EP1961-2BA11","alternativesUrl":"https://aoctrl.com/api/mcp/products/6EP1961-2BA11/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 6EP1961-2BA11 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and delivery window."},{"question":"What are the key ratings for 6EP1961-2BA11?","answer":"It operates on a 22-30 V DC input, delivers four controlled DC outputs at Vin minus roughly 0.2 V, achieves 97% efficiency, and snaps onto a DIN rail. Overcurrent protection trips at 1.0-1.5× set value (switch-off ~5 s), and current limitation triggers at 1.5× (switch-off typ. 100 ms)."},{"question":"What compliance documentation does 6EP1961-2BA11 carry?","answer":"UL-Recognized (UL 2367), cULus-Listed (UL 508, CSA C22.2 No. 107.1), CE, EAC, DNV GL, and ABS. Emissions per EN 55022 Class B, immunity per EN 61000-6-2, safety per EN 60950-1 and EN 50178."},{"question":"What is the mounting method for 6EP1961-2BA11?","answer":"It snaps onto a DIN rail per EN 60715 (35x7.5/15). Enclosure dimensions are 72 mm wide × 80 mm high × 72 mm deep, with a mounting height of 180 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP1961-2BA11","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/6EP1961-2BA11 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}