{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ188A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMAJ188A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMAJ188A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMAJ188A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMAJ, TRANSIL™ series, TVS Zener, 188V reverse standoff, 209V breakdown min, 388V clamping, 400W peak pulse, 1 unidirectional channel, DO-214AC SMA, surface mount, -55°C~150°C.","salesMarkdown":"## TRANSIL TVS — what this 188 V standoff part does It provides a single channel of protection in a surface-mount package, rated for 400 W peak pulse power. ## Voltage thresholds and clamping behaviour The reverse standoff voltage (working voltage) is 188 V — the rail or signal line should never exceed this in normal operation. Breakdown occurs at a minimum of 209 V, and the clamping voltage is held to 388 V maximum at the rated peak pulse current of 6 A (8/20 µs waveform). Housed in a surface-mount package, the SMAJ188A-TR is suited for automated assembly.","metaTitle":"STMicroelectronics SMAJ188A-TR TRANSIL TVS Diode","metaDescription":"STMicroelectronics SMAJ188A-TR TRANSIL TVS diode, 188V reverse standoff, 209V min breakdown, 388V clamping, 400W peak pulse power, DO-214AC SMA.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SMAJ, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"400W","Base Product Number":"SMAJ188","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMA (DO-214AC)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"209V","Voltage - Clamping (Max) @ Ipp":"388V","Voltage - Reverse Standoff (Typ)":"188V","Current - Peak Pulse (10/1000µs)":"6A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cb45a0c551131e855efff64db719fd1e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMAJ188A-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMAJ188A-TR obsolete?","answer":"No."},{"question":"What are the specifications of SMAJ188A-TR?","answer":"It is a 188 V reverse-standoff, 209 V min breakdown, 388 V clamping, 400 W peak pulse power TVS diode in a DO-214AC SMA package, operating from -55°C to 150°C."},{"question":"What is the closest pin-compatible alternative to SMAJ188A-TR in this component family?","answer":"The SMAJ series includes multiple voltage variants in the same DO-214AC footprint. For the same 188 V standoff, the SMAJ188A (without the -TR suffix) is functionally identical — the -TR suffix indicates tape-and-reel packaging. Any other SMAJ voltage variant will be pin-compatible but offers a different protection threshold."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMAJ188A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMAJ188A-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}}