{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC6.8CAHM3_A/I","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC6.8CAHM3_A-I","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC6.8CAHM3_A-I","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC6.8CAHM3_A%2FI","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor 1.5SMC6.8CAHM3_A/I, bidirectional Zener-type TVS diode, 5.8V standoff / 6.45V min breakdown / 10.5V max clamping, 143A peak pulse, 1500W peak pulse, AEC-Q101, DO-214AB SMC, surface mount, Tape & Reel.","salesMarkdown":"## Standoff voltage and the clamping ceiling The 1.5SMC6.8CAHM3_A/I: The standoff voltage of 5.8 V sets the normal-operation ceiling — the TVS stays off and draws only leakage current up to this level, so it does not clamp the protected rail during start-up or transient-free operation. At 5.8 V nominal, the standoff sits roughly 12 % above a 5 V rail and 76 % above a 3.3 V rail — the two most common telecom logic rails. This gives the protected node adequate headroom against spurious conduction on either rail without requiring a lower-standoff part that would consume more clamping budget. The bidirectional polarity means the 5.8 V standoff and the 6.45–10.5 V clamping window apply to both polarities equally, with no need to separate the positive and negative protection rails in a differential telecom interface. ## Peak pulse capability and surge handling The 1.5 kW figure is the clamping-mode dissipation capacity, not a continuous rating — the transient thermal impedance curve in the Vishay datasheet determines the actual junction temperature rise per surge event. Peak pulse current of 143 A at the standard 10/1000 µs waveform validates the surge-handling ceiling for the listed 1.5 kW. The two figures must be read together: a TVS that clamps at 10.5 V and conducts 143 A delivers 1.5 kW into the clamping mode. Specifying one without the other leaves the surge budget undefined. ## Automotive qualification for telecom deployment AEC-Q101 is the automotive discrete semiconductor qualification standard covering temperature cycling, humidity, mechanical stress, and electrical testing. A part that passes AEC-Q101 is accepted for engine-compartment and chassis-domain deployment — the thermal and mechanical margin it carries is more than sufficient for the board-level operating environment in a telecom enclosure or outdoor cabinet. Operating junction temperature range is -65 °C to 150 °C, with the maximum rated junction temperature also at 150 °C. This gives the design a 0 °C margin at the upper bound — normal for a Tj(max) part — and the full span accommodates both cold outdoor telecom cabinet temperatures and any self-heating from repetitive clamping events. The listed telecom application reflects the part's original qualification target; the automotive grade extends that thermal and mechanical margin to any industrial or infrastructure installation where board-level protection with proven stress testing is required.","metaTitle":"Vishay 1.5SMC6.8CAHM3_A/I TVS Diode, 1500W","metaDescription":"Vishay 1.5SMC6.8CAHM3_A/I, bidirectional TVS diode, 5.8V standoff, 10.5V clamping, AEC-Q101 automotive, DO-214AB SMC. 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","Grade":"Automotive","Series":"1.5SMC, TransZorb®","Packaging":"Tape & Reel (TR)","Part Status":"Active","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":"1.5SMC6.8","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)":"6.45V","Voltage - Clamping (Max) @ Ipp":"10.5V","Voltage - Reverse Standoff (Typ)":"5.8V","Current - Peak Pulse (10/1000µs)":"143A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4447","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC6.8CAHM3_A%2FI/alternatives.json"},"ai":{"faq":[{"question":"What does the 5.8 V standoff voltage mean for my telecom line-card design?","answer":"The 5.8 V standoff is the maximum voltage at which the TVS remains in its high-impedance off-state during normal operation. The clamping voltage of 10.5 V maximum is the let-through voltage during a surge event."},{"question":"How does the 1.5 kW peak pulse rating relate to the 143 A peak pulse current spec?","answer":"They are two expressions of the same clamping-mode event: at 10.5 V clamping and 143 A conduction, the device dissipates approximately 1500 W into the clamping mode. Both ratings must be considered together when sizing the surge event — specifying a part by watts alone without the corresponding clamping voltage leaves the protected node's let-through voltage undefined."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC6.8CAHM3_A-I","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/1.5SMC6.8CAHM3_A-I 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}}