{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMCJ170A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMCJ170A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMCJ170A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMCJ170A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMCJ, TRANSIL™, TVS Diode, Zener, SMCJ170A-TR, 1500W (1.5kW) peak pulse power, 170V reverse standoff, 353V clamping, 28A (8/20µs), unidirectional, DO-214AB (SMC), surface mount.","salesMarkdown":"## 1500W peak pulse power — the surge rating that matters Its 1500W peak pulse power (1.5kW) at 10/1000µs waveform is the headline number — it tells you the part can absorb a lightning surge or inductive kick without failing short. ## 170V standoff — where it sits in the rail budget The 170V reverse standoff voltage is the DC bias the part ignores during normal operation. You place this across a 170V bus — 48V telecom rectifiers, 120V AC/DC rails, or 170V solar string inputs — and it stays invisible until a transient exceeds the 189V minimum breakdown voltage. That 189V to 353V window is the clamping zone; the load sees the clamp until the surge energy dissipates. ## DO-214AB (SMC) package — board integration Surface-mount in the DO-214AB (SMC) package. The SMC footprint is a standard JEDEC outline — 8.0 mm body length, 6.85 mm width, with gull-wing leads for solder-joint inspection. The 1500W rating assumes a copper-land pattern per the datasheet's recommended pad layout — skimping on pad area derates the surge capability. MSL 1 out of the bag, no bake required before reflow as long as the moisture barrier bag is intact. Cut Tape (CT) also available for prototype runs.","metaTitle":"SMCJ170A-TR TVS Diode, 1500W, 170V Standoff, DO-214AB","metaDescription":"STMicroelectronics SMCJ170A-TR TRANSIL™ TVS diode: 1500W peak pulse power, 170V reverse standoff, 28A (8/20µs) peak current, unidirectional, DO-214AB.","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":"SMCJ170","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"189V","Voltage - Clamping (Max) @ Ipp":"353V","Voltage - Reverse Standoff (Typ)":"170V","Current - Peak Pulse (10/1000µs)":"28A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/afa32e66ad58d9d3b67a92acb79ea14b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMCJ170A-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between SMCJ170A and SMCJ170A-TR?","answer":"The SMCJ170A is the base product number; the -TR suffix indicates Tape & Reel packaging. Electrically they are identical — same 1500W peak pulse power, same 170V standoff, same DO-214AB package. The -TR version is the reeled format for volume assembly; SMCJ170A without the suffix typically ships in bulk tube or cut tape."},{"question":"Is SMCJ170A-TR bidirectional?","answer":"No, this is a unidirectional device — one channel. It protects against positive transients referenced to ground. For AC or bipolar signal lines, use a bidirectional variant (e.g., SMCJ170CA) which has back-to-back Zener junctions."},{"question":"Does SMCJ170A-TR have power line protection?","answer":"No. This TVS is designed for secondary transient suppression on DC rails, not for primary AC mains protection. It clamps fast overvoltages from lightning or switching transients, but it is not rated for continuous overvoltage or direct AC line connection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMCJ170A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMCJ170A-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}}