{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC9.1CAHE3/9AT","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC9.1CAHE3-9AT","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC9.1CAHE3-9AT","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1CAHE3%2F9AT","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division 1.5SMC9.1CAHE3/9AT, automotive bidirectional TVS Zener, 7.78 V standoff, 8.65 V min breakdown, 13.4 V clamping @ 112 A, 1.5 kW peak pulse, DO-214AB (SMC) surface mount.","salesMarkdown":"The 1.5SMC9.1CAHE3/9AT: At the clamping voltage of 13.4 V, the part clamps the spike before the downstream circuit sees it, and the 112 A peak pulse current at that clamping point confirms the absorption capacity the clamping stage must deliver. For a 12 V automotive rail, a 13.4 V clamp gives adequate headroom above the nominal supply while keeping let-through voltage below what most downstream ICs tolerate. ## Voltage stack — standoff, breakdown, and clamping The reverse standoff of 7.78 V defines the maximum voltage the protected node sits at during normal operation — below this the TVS leaks minimally and the protected rail sees no clamp action. Breakdown starts at 8.65 V minimum; once the transient pushes the node into this band the TVS begins conducting and redirects the surge energy. ## Automotive qualification and thermal range AEC-Q101 qualified, part of the TransZorb® series in the 1.5SMC automotive family. Junction temperature range is -65°C to 150°C, which covers the under-hood band — engine-bay ambient that peaks near 125°C in summer still leaves margin before the 150°C TJ ceiling. The qualification stress testing covers temperature cycling, humidity, and mechanical shock, so the DO-214AB package is field-replaceable on an automotive board without special handling concerns. DO-214AB (SMC) package with the matching SMCJ supplier device designation — standard metal-electrode pad footprint on the cathode side. Surface-mount reflow profile; the cathode stripe marking is the orientation reference. For automotive boards requiring hand-rework, the SMCJ form factor is accessible with a fine-tip iron and drag-solder technique, though hot-air is cleaner. No exposed paddle; thermal relief on the pad lands manages solder fillet geometry during assembly.","metaTitle":"Vishay 1.5SMC9.1CAHE3/9AT TVS Diode, 13.4V Clamp, 1.5kW Peak","metaDescription":"Bidirectional TVS Zener, 7.78 V standoff / 13.4 V clamping @ 112 A peak pulse, 1.5 kW peak pulse power, AEC-Q101 automotive. Active — quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"Automotive, AEC-Q101, 1.5SMC, TransZorb®","Package":"Tape & Reel (TR)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC9.1","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMCJ)","Voltage - Breakdown (Min)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"112A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1CAHE3%2F9AT/alternatives.json"},"ai":{"faq":[{"question":"What voltages define the protection window for 1.5SMC9.1CAHE3/9AT?","answer":"The protection window runs from 7.78 V reverse standoff — below this the TVS leaks minimally and the protected node operates normally — up to the 8.65 V minimum breakdown, where the TVS begins conducting and clamps the transient."},{"question":"What is the 1.5SMC9.1CAHE3/9AT used for?","answer":"It is a unidirectional (bidirectional) TVS Zener designed for automotive circuit protection on 12 V rails. The 7.78 V standoff fits a 12 V nominal system with adequate margin; the 1.5 kW peak pulse rating handles the ISO 7637-2 load-dump and jump-start transients common in automotive environments. AEC-Q101 qualification is the qualification standard for automotive-grade discrete semiconductors, covering temperature cycling, humidity bias, and mechanical stress."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC9.1CAHE3-9AT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC9.1CAHE3-9AT 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}}