{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ64","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ64","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ64","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ64","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor Zener TVS diode, 1.5SMCJ64, unidirectional 1-channel, 64V standoff, 71.1V min breakdown, 114V clamping max @ 13.2A, 1500W peak pulse, -50°C to 150°C Tj, surface mount DO-214AB SMC package, Strip.","salesMarkdown":"## Voltage-clamp window — what 64 V standoff means for your rail The 1.5SMCJ64: The reverse standoff voltage of 64 V sets the maximum working rail this diode watches without conducting — the line sits below breakdown and the TVS stays passive in normal operation. When a transient does break through, the minimum breakdown voltage of 71.1 V marks the point the diode begins clamping. The gap between 64 V and 71.1 V is the design margin — a tighter rail with less headroom calls for a lower-Vbr part; a noisier supply with expected spikes rewards the 7 V of untouched headroom here. For a 48 V rail with 1.2× transient headroom budget, 114 V clamp lands inside the window. This is not a continuous power rating; it describes the diode's ability to absorb a single high-energy transient without going into thermal runaway. With a 13.2 A peak pulse current at that waveform, the 114 V clamping ceiling is the voltage your downstream circuitry sees during the event. A downstream IC with a 75 V absolute-max needs a clamping margin — 114 V against 75 V is a narrow gap; confirm the IC's transient-withstand rating before committing this part to a 48 V input. The DO-214AB SMC package demands a copper pad under the cathode tab sized for thermal relief — the peak pulse energy is dissipated as heat through the lead frame into the PCB copper. A thermal pad of at least the tab area, with thermal vias to a ground plane, keeps Tj below 150 °C during the event. ## Junction temperature and the unidirectional constraint For a TVS mounted in an enclosed panel with limited airflow, run a Tj estimate using the clamping energy, pulse width, and PCB thermal resistance before assuming the rating covers the application. This is a unidirectional device with a single clamping direction — it protects against positive transients on a single-polarity rail. It does not clip negative swings. If the protected line sees bidirectional polarity (common on AC-coupled rails or motor windings), a unidirectional TVS is the wrong part; a bidirectional variant of the same standoff voltage is the correct choice. Power line protection is listed as No — this part is not characterized for direct connection to the AC mains without additional isolation or coordination. It is suited for secondary-side protection on DC rails, field wiring protection at a PLC input, or clamp on a sensor supply line.","metaTitle":"Diotec 1.5SMCJ64 TVS Diode, 64V Standoff, 1500W Peak","metaDescription":"Diotec 1.5SMCJ64 unidirectional Zener TVS diode, 64V standoff / 71.1V breakdown / 114V clamp, 1.5 kW peak pulse, DO-214AB SMC. Active production.","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)":"71.1V","Voltage - Clamping (Max) @ Ipp":"114V","Voltage - Reverse Standoff (Typ)":"64V","Current - Peak Pulse (10/1000µs)":"13.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9158","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I source 1.5SMCJ64 and get a current quote?","answer":"Quoted to order through independent distribution against the BOM quantity."},{"question":"What is the difference between standoff voltage, breakdown voltage, and clamping voltage on a TVS diode like 1.5SMCJ64?","answer":"Standoff voltage (64 V) is the maximum working rail the TVS watches without conducting. Breakdown voltage (71.1 V minimum) is where the diode begins to avalanche and clamp. Clamping voltage (114 V maximum at 13.2 A peak pulse) is the voltage the protected node sees during a fault event. These three numbers define the protection window — a tighter gap between standoff and clamp means less voltage stress reaches the downstream load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ64","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ64 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}}