{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ22C","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ22C","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ22C","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ22C","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor 1.5SMCJ22C, bidirectional Zener TVS diode, 1500W peak pulse, 22V standoff, 39.4V clamping, DO-214AB (SMC) surface-mount, -50°C to 150°C junction.","salesMarkdown":"## Standoff, breakdown, and clamping — the three voltage ratings The 1.5SMCJ22C: The 22V reverse standoff is the working voltage below which the device stays passive — the line sees only the diode's low reverse leakage until a transient pushes it into conduction. At 24.4V minimum breakdown, the Zener avalanche kicks in, snapping the line to the clamping ceiling. The 39.4V maximum clamping voltage at the rated 38.1A peak pulse current is what the downstream load actually survives — that number, not the standoff, is what the protection circuit designer holds against the TVS datasheet limit. 1500W peak pulse rating is specified on the 10/1000µs IEC 61000-4-5 waveform — the classic 1.2/50 µs voltage surge and 8/20 µs current impulse combination that telecom and industrial enclosures face at the port entry point. Running a slower or longer-duration surge against the same peak wattage pushes the thermal budget differently; the clamping characteristic curve in the Diotec datasheet maps the derating. ## Bidirectional, single-channel — polarity math The 1.5SMCJ22C is a single-channel bidirectional TVS, meaning it clamps both polarities without a separate polarity stack — a ground-referenced line that can see both positive and negative transients (triggered by switching or ESD coupling) needs exactly this. The C-suffix confirms bidirectional; an A-suffix in the same series would be unidirectional. ## DO-214AB package and junction thermal margin The SMC/DO-214AB body mounts flat to the PCB with a soldered cathode tab — the exposed pad under the package tab is the primary thermal path. With a TJ max of 150°C, the layout's copper area and any adjacent airflow determine how much of the 1500W peak pulse the board can actually sink without the junction exceeding its limit on a long-tail surge. Listed as Active by Diotec Semiconductor. Available to quote against a BOM line — lead time and lot-specific pricing confirmed at RFQ through independent distribution. Diotec maintains its own 1.5SMCJ series lineup as the primary product family.","metaTitle":"Diotec 1.5SMCJ22C TVS Diode, 22V standoff, DO-214AB","metaDescription":"Diotec 1.5SMCJ22C bidirectional Zener TVS, 1500W peak pulse, 39.4V clamping. 22V standoff, 38.1A peak pulse current. Active — quoted to order.","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)":"24.4V","Voltage - Clamping (Max) @ Ipp":"39.4V","Voltage - Reverse Standoff (Typ)":"22V","Current - Peak Pulse (10/1000µs)":"38.1A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8068","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMCJ22C/alternatives.json"},"ai":{"faq":[{"question":"What does the 22V standoff rating on 1.5SMCJ22C mean for my design?","answer":"The 22V standoff means the TVS diode sits idle below that voltage, drawing only its low reverse leakage current. A transient that exceeds the 24.4V minimum breakdown triggers the Zener avalanche, clamping the peak at 39.4V to protect the downstream circuit — so the protected rail can operate up to 22V nominal while the clamping ceiling at surge current stays at 39.4V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ22C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ22C 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}}