{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMCJ33A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMCJ33A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMCJ33A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMCJ33A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMCJ, TRANSIL™ series, TVS Zener diode, unidirectional, 33V reverse standoff, 36.7V breakdown min, 69.7V clamping, 1500W peak pulse power, DO-214AB SMC package, surface mount, -55°C to 150°C junction temperature.","salesMarkdown":"## Transient protection for a 33V rail It handles 1500W peak pulse power per the 10/1000µs waveform, with a clamping voltage of 69.7V at the peak pulse current of 143A (8/20µs). The 36.7V minimum breakdown voltage defines the avalanche threshold — the part starts conducting here, so the protected rail must stay below this level during normal operation. This is a general-purpose transient suppressor for power supplies, industrial controls, and telecom equipment where a single 33V rail needs surge protection. ## Clamping voltage and rail coordination The 69.7V maximum clamping voltage at Ipp is the voltage the downstream circuit sees during a surge event. If the protected component's absolute maximum rating is, say, 70V, this part leaves only 0.3V of margin — borderline. For a 33V rail, typical downstream ICs are rated 40V to 60V, so the 69.7V clamp is acceptable for most designs, but worth checking against the specific load's breakdown. Housed in the DO-214AB (SMC) package, this is a surface-mount device with a standard footprint shared across the SMCJ family.","metaTitle":"STMicroelectronics SMCJ33A-TR TVS Diode, 1500W, 33V Standoff","metaDescription":"STMicroelectronics SMCJ33A-TR TRANSIL™ TVS diode, 1500W peak pulse power, 33V reverse standoff, 69.7V clamping, unidirectional, DO-214AB SMC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SMCJ, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"SMCJ33","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"36.7V","Voltage - Clamping (Max) @ Ipp":"69.7V","Voltage - Reverse Standoff (Typ)":"33V","Current - Peak Pulse (10/1000µs)":"143A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/afa32e66ad58d9d3b67a92acb79ea14b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMCJ33A-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the peak pulse power handling of SMCJ33A-TR?","answer":"It is rated for 1500W peak pulse power, measured with a 10/1000µs waveform. At the 8/20µs waveform (common for ESD testing), the peak pulse current is 143A. This power rating determines the size of surge the diode can absorb — sufficient for industrial transient protection per IEC 61000-4-5."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMCJ33A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMCJ33A-TR 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}}