{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ20C","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ20C","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ20C","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ20C","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor 1.5SMCJ20C unidirectional TVS diode, 1500W peak pulse power, 35.8V clamping @ 41.9A, 20V reverse standoff, DO-214AB (SMC) surface mount.","salesMarkdown":"## What the 1.5SMCJ20C protects — and how the ratings decide the fit The reverse standoff voltage sits at 20 V typ, meaning the device stays off and draws only leakage current during normal bus operation up to that rail. When a voltage transient drives the line above the 22.2 V minimum breakdown, the diode clamps the spike to 35.8 V maximum at 41.9 A peak pulse current, protecting downstream ICs and MOSFET gates from overvoltage damage. The 20 V standoff gives roughly 3 V of headroom above the nominal rail before conduction begins, which is the normal design trade-off — enough margin to avoid leakage-drain during ringing, tight enough to catch fast transients before the protected device sees damage. ## Surge immunity and thermal margin The surface-mount DO-214AB footprint is reflow-solderable, and the SMC body is one of the more common TVS packages, so swapping it on a rework bench with hot air is straightforward when a board comes in for failure analysis. The single bidirectional channel count is listed as 1 — this device is unidirectional, clamping only positive transients in one direction. For AC line or dual-polarity protection, a bidirectional TVS or a back-to-back pair would be required. ## Where TVS diodes of this class land in a panel TVS diodes in this power class are typically placed on the DC bus feeding downstream loads — motor drive output stages, relay coil kickback rails, sensor supply lines. The general-purpose applications rating means there are no enforced restrictions on the protected circuit type, so it sees use across power supplies, lighting controls, and communications interface protection as a first-stage clamp before the bulk TVS or varistor higher up the chain.","metaTitle":"Diotec 1.5SMCJ20C TVS Diode, 1.5kW 35.8V SMC","metaDescription":"Diotec 1.5SMCJ20C unidirectional TVS diode, 1500W peak pulse, 35.8V clamping, 20V standoff. Active production. Quoted to order on RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Diotec Semiconductor","Type":"Zener","Series":"-","Package":"Strip","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Operating Temperature":"-50°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC/DO-214AB","Voltage - Breakdown (Min)":"22.2V","Voltage - Clamping (Max) @ Ipp":"35.8V","Voltage - Reverse Standoff (Typ)":"20V","Current - Peak Pulse (10/1000µs)":"41.9A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8068","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMCJ20C/alternatives.json"},"ai":{"faq":[{"question":"What standoff voltage should I compare when selecting a 1.5SMCJ20C alternative?","answer":"Confirm the clamping voltage against the actual transient waveform your board sees, not just the datasheet spec, since real-world surge shape affects the real clamping level."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ20C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ20C when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-14T23:42:32.751Z","lastPublished":"2026-09-14T23:42:32.751Z","indexable":true}}