{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ48C","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ48C","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ48C","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ48C","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor, 1.5SMCJ48C unidirectional TVS diode, 1500 W peak pulse, 48 V standoff, 53.3 V breakdown, 85.5 V clamping, 17.5 A peak pulse, -50°C to 150°C TJ, DO-214AB (SMC) surface mount.","salesMarkdown":"## What the voltage chain means for your rail The 48 V reverse standoff is the working rail the 1.5SMCJ48C idles off without conducting — above it, the 53.3 V minimum breakdown threshold is reached and the device avalanches into protection. For a 48 V system bus this means roughly 37 V of headroom between normal operation and the clamping onset, and a hard ceiling of 85.5 V under surge — the downstream semiconductor survives the event if the source impedance limits the current to the 17.5 A rating. The 1500 W rating is a 10/1000 µs surge waveform spec — a 10 µs rise to peak, decaying over 1000 µs to half value. This is the classic AC mains surge and inductive kick transient envelope. A faster 8/20 µs event (lightning surge, motor shutdown) delivers the same energy in a shorter time, pushing the clamping voltage higher before the device responds — the 1.5 kW rating alone does not tell you the clamping voltage under a 8/20 µs surge, only the 10/1000 profile. Match the TVS waveform rating to the expected threat profile on the target system. ## DO-214AB package and board assembly The SMC (DO-214AB) package is a standard surface-mount outline — the cathode band identifies the polarity end on the unidirectional part. Solder joint reliability on the wide pad at the cathode tab drives the thermal path during a clamping event: the die-to-tab thermal impedance sets how much junction temperature rise occurs per joule absorbed, so a solid reflow pad and adequate copper pour under the device matter more here than on a low-power resistor. The -50°C to 150°C junction operating range gives reasonable headroom for cold-starts and short-duration overloads, but a sustained overvoltage that holds the device in avalanche will thermally dominate the clamping voltage curve. ## Where unidirectional TVS diodes sit in a protection stack This part protects a positive-going rail against transients referenced to ground — it is not a bidirectional clamp, so it does not handle AC or bipolar events. On a 48 V supply rail the unidirectional polarity is straightforward: cathode faces the supply, anode to ground. For a floating or bipolar rail the bidirectional equivalent (the CA variant of the same series) would be the right sibling. Power Line Protection is listed as No — this part is not a mains-rated TVS for direct AC line connection; it protects secondary-side rails and signal lines.","metaTitle":"1.5SMCJ48C TVS Diode, 1.5 kW, 48 V","metaDescription":"Diotec 1.5SMCJ48C unidirectional TVS diode, 1500 W peak pulse, 48 V standoff, DO-214AB SMC package. Sourced to order via RFQ.","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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC/DO-214AB","Voltage - Breakdown (Min)":"53.3V","Voltage - Clamping (Max) @ Ipp":"85.5V","Voltage - Reverse Standoff (Typ)":"48V","Current - Peak Pulse (10/1000µs)":"17.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8068","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5SMCJ48C and how do I get a quote?","answer":"The 1.5SMCJ48C is sourced to order through independent distribution."},{"question":"What package does the 1.5SMCJ48C come in, and is it standard on a DO-214AB footprint?","answer":"The 1.5SMCJ48C uses the DO-214AB (SMC) surface-mount package — a standard industry outline with cathode marking on the banded end. It is a drop-in replacement for any 1.5 kW unidirectional TVS in the same package and polarity orientation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ48C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ48C 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}}