{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91CA-E3/57T","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91CA-E3-57T","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91CA-E3-57T","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91CA-E3%2F57T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor 1.5SMC91CA-/57T bidirectional Zener (TVS) diode, 1500W peak pulse power, 77.8V standoff / 86.5V min breakdown / 125V clamping, 12A peak pulse, DO-214AB SMC surface mount, -65°C to 150°C junction.","salesMarkdown":"## Transient protection — what the clamping spec decides The 1.5SMC91CA-E3/57T: The 1.5SMC91CA-/57T is a unidirectional TVS diode — Vishay calls it a TransZorb — that clamps a voltage transient across a protected node once the standoff limit is exceeded. The standoff of 77.8 V typ means the diode presents a high-impedance leakage path during normal operation, so it loads neither the supply nor the signal line at the working voltage. When a surge pushes the node above the breakdown minimum of 86.5 V, the device transitions to conduction and clamps the peak at 125 V max, dissipating 1500 W for the 10/1000 µs pulse shape the rating is conditioned on. That 125 V ceiling is what the downstream circuit must survive — a regulator input, a motor drive DC bus, or an I/O rail that cannot exceed its abs-max without damage. The 12 A peak pulse rating at the 10/1000 µs wave shape tells you the surge current the device survives without undergoing compression or change of state. Sustained or repeated transients above that level — or a different pulse shape such as 8/20 µs lightning — require a device with a higher Ipp figure or a different series; the 1.5SMC series is sized for the 1.5 kW class of board-level transient protection on telecom, industrial control, and power-supply rails. ## Package, thermal margin, and board assembly The DO-214AB (SMCJ) package is the industry-standard SMC outline for TVS diodes in this power class. The supplier device package field maps it to SMCJ, confirming footprint and pinout compatibility with any SMCJ TVS from any manufacturer at this voltage and polarity. Surface-mount termination on the DO-214AB demands a reflow profile consistent with MSL sensitivity — the reel packaging in means the part arrives on a moisture-barrier reel; verify the moisture sensitivity level in the datasheet before reflow if the part has been stored open for more than the floor life limit. ## Bidirectional polarity and standoff margin The CA suffix denotes bidirectional polarity — it clamps both positive and negative transients. The 77.8 V standoff applies in both directions, meaning this part suits AC signal rails or bipolar bus protection where neither polarity can exceed the breakdown threshold without clamping. For a unidirectional option that clamps only one polarity with a slightly higher standoff for the same breakdown band, the A-suffix variant (no C) is the direct replacement within the same series.","metaTitle":"Vishay 1.5SMC91CA-E3/57T TVS Diode, 1500W 125V Clamping","metaDescription":"Vishay 1.5SMC91CA-E3/57T bidirectional TVS diode, 1500W peak pulse, 125V clamping, 77.8V standoff, DO-214AB SMC package. Active status — 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":"1.5SMC, TransZorb®","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","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 (SMCJ)","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":"$0.6000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91CA-E3%2F57T/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available for 1.5SMC91CA-/57T?","answer":"RoHS and REACH compliance statements are typically available directly from Vishay; the standard part ships in RoHS-compliant configuration as built and tested. For export documentation, DFARS, or Conflict Minerals reporting, check the manufacturer's product page or request a CoC at RFQ — no compliance flags appear in the listing data."},{"question":"What series does 1.5SMC91CA-/57T belong to, and what does TransZorb mean?","answer":"The part is in the 1.5SMC series and carries the TransZorb® designation — Vishay's trademark for their glass-passivated TVS diode construction. TransZorb construction provides a controlled avalanche characteristic versus a conventional Zener, meaning the device clamps predictably at the breakdown voltage rather than exhibiting the soft knee of a standard Zener diode. That matters for transient protection: a TVS is designed to absorb and clamp a defined pulse energy, while a Zener is designed to regulate at a defined voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91CA-E3-57T","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/1.5SMC91CA-E3-57T 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}}