{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T33CA","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T33CA","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T33CA","factsUrl":"https://icboms.com/api/mcp/products/SM15T33CA","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T33CA, TRANSIL™ series, bidirectional Zener TVS diode, 1500W peak pulse power, 28.2V standoff voltage, 59V clamping, DO-214AB (SMC) surface mount package, -55°C to 150°C junction temperature.","salesMarkdown":"## 1500 W bidirectional TVS in a DO-214AB SMC package The device offers a reverse standoff voltage of 28.2 V, a minimum breakdown voltage of 31.4 V, and a maximum clamping voltage of 59 V at the rated peak pulse current of 169 A (8/20 µs waveform). The 31.4 V minimum breakdown voltage is where the device starts to avalanche, and the 59 V clamping voltage is the maximum voltage the load sees during a surge event. For a 24 V nominal supply rail (common in industrial control and automotive systems), the 28.2 V standoff provides adequate margin against steady-state tolerances, while the 59 V clamp keeps transients below typical downstream component ratings. The 1500 W peak pulse power (10/1000 µs) translates to the energy the diode can absorb in a single surge event; for shorter pulses (8/20 µs) the peak current capability rises to 169 A, which is the figure used for lightning-surge coordination per IEC 61000-4-5. ## Bidirectional — one device for AC or bipolar protection This is the correct choice for protecting AC signal lines, bipolar supplies (±24 V), or data lines where the signal swings above and below ground. In a DC rail application, a unidirectional TVS (such as the SM15T33A) would offer a lower clamping voltage for the same standoff because the forward drop is not in the clamp path, but the bidirectional part simplifies BOM by removing polarity concerns during assembly. The DO-214AB (SMC) package footprint is larger than the smaller SMA/SMB variants, which translates to better thermal dissipation for sustained surge events — a factor when the TVS must absorb multiple pulses in rapid succession.","metaTitle":"STMicroelectronics SM15T33CA TVS Diode, 1500W Bidirectional","metaDescription":"STMicroelectronics SM15T33CA bidirectional TVS diode, 1500W peak pulse power, 28.2V standoff, 59V clamping, DO-214AB SMC package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SM15T, 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":"SM15T33","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"31.4V","Voltage - Clamping (Max) @ Ipp":"59V","Voltage - Reverse Standoff (Typ)":"28.2V","Current - Peak Pulse (10/1000µs)":"169A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/539ce92ad6505c8a9d704773ec1ef151.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SM15T33CA/alternatives.json"},"ai":{"faq":[{"question":"What is the peak pulse power of SM15T33CA?","answer":"The SM15T33CA is rated for 1500 W peak pulse power per the 10/1000 µs waveform. For the shorter 8/20 µs waveform used in lightning-surge testing, the peak pulse current is 169 A."},{"question":"Is SM15T33CA bidirectional?","answer":"Yes, the SM15T33CA is a single bidirectional channel, meaning it clamps overvoltages of either polarity. This is indicated by the 'CA' suffix in the order code (C = bidirectional, A = unidirectional)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T33CA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T33CA 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}}