{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ85","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ85","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ85","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ85","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor 1.5SMCJ85 unidirectional TVS Zener, 85V standoff, 1500W peak pulse, clamping 151V @ 9.9A, DO-214AB SMC surface mount, -50°C to 150°C junction, strip.","salesMarkdown":"## Clamping performance and standoff rating The 1.5SMCJ85: The 85V reverse standoff is the working rail the diode sits across idle — it does not conduct until the transient pushes the line above this level. When it does clamp, the 151V maximum clamping voltage at 9.9A peak pulse (10/1000 µs waveform) tells the layout engineer what the downstream circuit sees at the moment of suppression — the clamping voltage multiplied by the peak current gives the instantaneous let-through energy the protected node absorbs. The 1.5 kW peak pulse rating is a single-event, non-repetitive figure — a 1.2/50 µs or 8/20 µs surge that stays within this energy ceiling does not degrade the junction. Sustained or repetitive transients above this level shift the clamping characteristic and are the reason a TVS chosen at the rail margin — not the absolute maximum — lasts the product lifetime. ## Junction temperature and the thermal margin At the high end the clamping voltage rises with temperature — a TVS that holds 85V standoff at 25°C may sit closer to the rail at 125°C ambient, so the layout thermal resistance from junction to ambient must stay within the datasheet curve to keep headroom. The DO-214AB SMC package gives the cathode tab a thermal pad the size of the full package width — the board pad area under that tab is the primary heatsinking path. With the tab soldered to a generous copper pour, the RthJC stays low enough that the 1.5 kW single-event rating is achievable without an external heatsink.","metaTitle":"Diotec 1.5SMCJ85 TVS diode, 85V standoff, 1.5kW peak pulse","metaDescription":"Diotec Semiconductor 1.5SMCJ85 unidirectional TVS diode, 85V standoff, 1.5kW peak pulse, clamping 151V max @ 9.9A. Active, quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Diotec Semiconductor","Type":"Zener","Series":"-","Package":"Strip","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Operating Temperature":"-50°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC/DO-214AB","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"94.4V","Voltage - Clamping (Max) @ Ipp":"151V","Voltage - Reverse Standoff (Typ)":"85V","Current - Peak Pulse (10/1000µs)":"9.9A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9158","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMCJ85/alternatives.json"},"ai":{"faq":[{"question":"What type of diode is the 1.5SMCJ85?","answer":"The single-channel unidirectional polarity means it clamps positive-going transients on a one-polarity rail — it does not protect bidirectionally or across AC lines without a bridge arrangement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ85","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ85 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}