{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91CAHM3/H","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91CAHM3-H","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91CAHM3-H","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91CAHM3%2FH","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor 1.5SMC91CAHM3/H, Zener transient voltage suppressor (TransZorb®), AEC-Q101 qualified, automotive grade, 1.5 kW peak pulse, 77.8 V standoff, 125 V clamping @ 12 A, bidirectional 1-channel, DO-214AB SMC surface mount, Tape & Reel.","salesMarkdown":"## What the 1.5SMC91CAHM3/H is and why it exists The 1.5SMC91CAHM3/H is an AEC-Q101 qualified Zener-based transient voltage suppressor — Vishay calls it a TransZorb® — in the DO-214AB (SMC) surface-mount package. ## What the peak-pulse and clamping ratings mean The 77.8 V reverse standoff is the working voltage the line sits at under normal operation; the 125 V maximum clamping voltage is where the device turns on and clamps the spike — at 12 A peak pulse current. For a telecom line running near 48 V nominal, 77.8 V standoff gives comfortable headroom above the DC working point while keeping the clamping ceiling low enough to protect downstream electronics. That is the difference between \"automotive capable\" and an AEC-Q101 qualified part: qualification is proven, not claimed. ## Package, mounting, and sourcing The DO-214AB (SMC) package is the standard industry footprint for 1.5–3 kW TVS diodes — the wide metal tab underneath is the thermal path to the board pad, and the recommended land pattern controls the solder-fillet shape that carries fault current away from the junction. Tape-and-reel packaging suits automated pick-and-place in high-volume telecom or automotive module assembly. The 1.5SMC series base part number (1.5SMC91) is the family identifier; the CA suffix denotes the bidirectional clamp configuration at this voltage. If a unidirectional variant is needed, the 1.5SMC91A variant is the direct equivalent with the same standoff, clamping, and peak pulse ratings.","metaTitle":"Vishay 1.5SMC91CAHM3/H Zener TVS Diode, 1.5 kW, 125 V Clamp","metaDescription":"Vishay 1.5SMC91CAHM3/H — AEC-Q101 qualified Zener TVS in DO-214AB (SMC), 1.5 kW peak pulse, 125 V clamping, 77.8 V standoff, 12 A peak pulse. Active.","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","Grade":"Automotive","Series":"1.5SMC, TransZorb®","Packaging":"Tape & Reel (TR)","Applications":"Telecom","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","Package / Case":"DO-214AB, SMC","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC91","Operating Temperature":"-65°C ~ 150°C (TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMC)","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3715","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91CAHM3%2FH/alternatives.json"},"ai":{"faq":[{"question":"What voltage does the 1.5SMC91CAHM3/H clamp at?","answer":"The reverse standoff — the normal working voltage — is 77.8 V typical, so the line can sit at telecom nominal levels without the device conducting."},{"question":"What is the closest alternative in the 1.5SMC family?","answer":"The unidirectional equivalent is the 1.5SMC91A, which shares the same 77.8 V standoff, 125 V clamping, and 1.5 kW peak pulse ratings — the only difference is single-direction (unidirectional) versus bidirectional clamping. Confirm the bidirectional topology is required for the circuit before selecting it."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91CAHM3-H","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/1.5SMC91CAHM3-H 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}}