{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY1708-4","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY1708-4","canonicalUrl":"https://aoctrl.com/siemens/5SY1708-4","factsUrl":"https://aoctrl.com/api/mcp/products/5SY1708-4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY1708-4 device protection switch, 1-pole with auxiliary switch, 8 A rated AC, F2 tripping characteristic, 1 modular width, IP20, for standard rail mounting.","salesMarkdown":"The Siemens 5SY1708-4 is a SENTRON device protection switch — a single-pole unit with an integrated auxiliary switch (1P+AS) that trips on the F2 characteristic. Rated 8 A at AC, it's built to protect a single load circuit in a control panel, with the auxiliary contact feeding a status signal back to a PLC or indicator. Mounts horizontal or vertical — no restriction. The IP20 finger-safe terminals mean you can work live in a panel without a shock risk, as long as the front is closed. ## Temperature derating — the real current rating The 8 A rating holds up to 35 °C ambient. Above that, it derates: 7.33 A at 40 °C, 7.13 A at 45 °C, 6.91 A at 50 °C, 6.69 A at 55 °C, and 6.46 A at 60 °C. Built to IEC / DIN EN 60934 and UL1077 — so it's accepted in both IEC and North American panels. Halogen-free and silicon-free construction, which matters in clean-room or high-reliability environments where outgassing can't happen. The sealable design lets you lock the toggle position after commissioning, preventing unauthorized resets.","metaTitle":"Siemens 5SY1708-4 SENTRON Device Protection Switch, 8A F2, 1","metaDescription":"Siemens 5SY1708-4 SENTRON device protection switch, 8 A rated AC, F2 characteristic, 1P+AS, 1 MW. IEC/DIN EN 60934, UL1077. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SY1708-4","Height":"90 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / DIN EN 60934, UL1077","description":"Device circuit breaker 1-pole with auxiliary switch NO contact Characteristic F2 8A 230 V AC 50/60 Hz 60 V DC Icn 3 kA AC according to IEC 60934","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+AS","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"standard rail","Mounting Position":"Horizontal/vertical","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Device protection switch","at AC / rated value":"8 A","at DC / rated value":"60 V","protection class IP":"IP20","Overvoltage Category":"III","Combined Terminal Top":"No","according to EN 61346-2":"F","at 35 °C / rated value":"7.73 A","at 40 °C / rated value":"7.33 A","at 45 °C / rated value":"7.13 A","at 50 °C / rated value":"6.91 A","at 55 °C / rated value":"6.69 A","at 60 °C / rated value":"6.46 A","Combined Terminal Bottom":"No","according to IEC 81346-2":"F","Number Of Modular Width Units":"1","Tripping Characteristic Class":"F2","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","Influence Of The Surrounding Temperature":"30 °C @ 85%rF; 60 °C @ 20%rF\"","Type Of Voltage / Of The Operating Voltage":"AC/DC","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","Product Component / Neutral Conductor Switching":"No","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"Yes","Mechanical Service Life (Switching Cycles) / Typical":"6 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/78f2b92197b69f968736818ae2ba5d7a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=802790&mlfb=5SY1708-4"},"ai":{"faq":[{"question":"What is the closest functional second-source for 5SY1708-4?","answer":"The closest peer in the same SENTRON family is 5SY6013-7. Both are 1-pole device protection switches with similar ratings, but the 5SY1708-4 carries an integrated auxiliary switch (1P+AS) that the 5SY6013-7 lacks. If your circuit needs a status contact, the 5SY1708-4 is the one; if not, the 5SY6013-7 is a drop-in for the basic protection function."},{"question":"What are the key ratings of 5SY1708-4?","answer":"Rated 8 A at AC, 60 V DC, F2 tripping characteristic, 1-pole with auxiliary switch (1P+AS). Temperature range -40 to 70 °C, derated current above 35 °C. Complies with IEC/DIN EN 60934 and UL1077."},{"question":"What compliance documentation does Siemens provide for 5SY1708-4?","answer":"The part carries IEC / DIN EN 60934 and UL1077 approvals. It is halogen-free and silicon-free. Standard Siemens declarations (RoHS, REACH) are available on request through the supply channel."},{"question":"Where can I buy 5SY1708-4 and how is it quoted?","answer":"The 5SY1708-4 is sourced through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time, not before."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY1708-4","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/5SY1708-4 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}}