{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK3251-1AA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK3251-1AA10","canonicalUrl":"https://aoctrl.com/siemens/3RK3251-1AA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RK3251-1AA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS modular safety system, 3RK3251-1AA10, 24 V DC, 2 A, SIL 3 / Cat 4, 8 single-channel inputs, 4/8 F-RO, DIN rail, IP20.","salesMarkdown":"## Safety relay for SIL 3 / Cat 4 circuits The Siemens 3RK3251-1AA10 is a SIRIUS modular safety system rated SIL 3 per IEC 61508 and IEC 62061, and Category 4 per EN 954-1 and EN ISO 13849-1. That means it meets the highest single-fault-tolerant safety integrity level — suitable for guarding hazard zones where a single failure cannot lead to loss of the safety function. It carries 8 single-channel inputs and 4/8 F-RO (failsafe relay outputs), each rated 2 A at both 24 V DC and 230 V AC. The control supply is 24 V DC, and the insulation voltage is 300 V rated, with a surge withstand of 4 kV. Snap-on DIN-rail mounting (vertical position only). Finger-safe touch protection (IP20) means it can sit in a control panel without additional cover over the terminals. Pollution degree 3 environment, so it tolerates conductive dust and condensation typical of industrial panels.","metaTitle":"Siemens 3RK3251-1AA10 SIRIUS Safety Relay, 24 V DC, 2 A, SIL","metaDescription":"Siemens 3RK3251-1AA10 SIRIUS modular safety system, 24 V DC, 2 A, SIL 3 / Cat 4, DIN rail mount, IP20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Safety Relays"],"specifications":{"Depth":"124 mm","Width":"45 mm","title":"3RK3251-1AA10","Height":"111 mm","at 24 V":"2 A","at 230 V":"2 A","2-Channel":"0","description":"SIRIUS, expansion module 3RK32 for modular Safety system 3RK3 4/8 F-RO, 24 V DC/2 A can be parameterized via MSS ES 45 mm overall width screw terminal up to SIL3 (IEC 61508) up to Performance Level E (ISO 13849-1) without connection cable","Safety-Related":"0","Single Channel":"8","Type Of Voltage":"DC","lifecycle_stage":"current","Fastening Method":"DIN rail","Product Category":"Modular Safety System","Shock Resistance":"15g / 11 ms","Mounting Position":"vertical","Monitored Start-Up":"No","Non-Safety-Related":"0","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","protection class IP":"IP20","Design Of The Product":"4/8 F-RO","EMERGENCY OFF function":"No","according to IEC 61508":"3","according to IEC 62061":"3","Parameterizable Outputs":"Yes","Safety-Related 2-Channel":"0","Protective Door Monitoring":"No","Evaluation: Enabling Switch":"No","Evaluation: Selector Switch":"No","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"screw-type terminals","Insulation Voltage Rated Value":"300 V","category according to EN 954-1":"4","Relative Humidity During Operation":"10 ... 95 %","Evaluation: Two-Hand Operator Panel":"No","Surge Voltage Resistance Rated Value":"4 000 V","category according to EN ISO 13849-1":"4","due to burst according to IEC 61000-4-4":"2 kV (power ports)","reference code according to IEC 81346-2":"K","Touch Protection Against Electrical Shock":"finger-safe","control supply voltage 1 at DC rated value":"24 V","performance level (PL) according to ISO 13849-1":"e","vibration resistance according to IEC 60068-2-6":"5 ... 500 Hz: 0.75 mm","PFHD with high demand rate according to EN 62061":"7.15E-9 1/h","Evaluation: Electro-Sensitive Protective Equipment":"No","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","Number Of Outputs For Testing Contact-Based Sensors":"0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Fuse Link For Short-Circuit Protection Of Non-Solid-State Switching Element Required":"NH Typ 3NA, DIAZED Typ 5SB, NEOZED Typ 5SE"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$712.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ef9217da39faf4d0f888352ac6785999.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=202929&mlfb=3RK3251-1AA10"},"ai":{"faq":[{"question":"Where can I buy 3RK3251-1AA10 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing."},{"question":"What is the depth of 3RK3251-1AA10?","answer":"The depth is 124 mm."},{"question":"What is the width of 3RK3251-1AA10?","answer":"The width is 45 mm."},{"question":"What safety certifications does 3RK3251-1AA10 carry?","answer":"It is rated SIL 3 per IEC 61508 and IEC 62061, and Category 4 per EN 954-1 and EN ISO 13849-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK3251-1AA10","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/3RK3251-1AA10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:41:02.429Z","lastPublished":"2026-07-20T14:41:02.429Z","indexable":true}}