{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ43A","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ43A","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ43A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ43A","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor, 1.5SMCJ43A, unidirectional Zener TVS diode, 43V reverse standoff, 47.8V minimum breakdown, 69.4V clamping, 1.5 kW peak pulse, 21.6A, -50°C to 150°C junction, DO-214AB SMC surface mount, strip packaging.","salesMarkdown":"## TVS diode — what the voltage chain means for protection design The reverse standoff voltage of 43 V defines the continuous working voltage the diode sees in normal operation — the circuit should run below this so the TVS sits dormant until a surge arrives; the minimum breakdown of 47.8 V gives a small hysteresis window above the standoff before conduction begins. This is a unidirectional TVS, so it protects one polarity — positive transients on the line relative to ground. For bidirectional protection a dual-polarity TVS would be required; the 1.5SMCJ43A is not the right fit for AC lines or signals that swing both ways. ## Peak pulse rating and what 1.5 kW means in the field The junction temperature range of -50°C to 150°C covers cold outdoor equipment startup and enclosed-panel warmth without derating within those bounds — above 150°C TJ the manufacturer specifies end-of-life, so thermal design should keep the diode's effective TJ below the datasheet limit in the worst-case fault scenario. ## Package and assembly — DO-214AB in strip form The SMC (DO-214AB) is a standard JEDEC surface-mount package — the footprint matches the industry-standard TVS diode landing pattern, so it drops onto most reference designs without layout changes. The strip packaging means it ships in linear cut-tape; confirm whether the assembly line expects reel-and-tape or whether strip works for the pick-and-place setup. Power line protection is marked No in the listing — this part protects individual signal and low-power rails, not the AC mains bus itself. For board-level protection on a 24 V or 48 V rail, the 43 V standoff sits comfortably above the nominal rail; for 48 V telecom the standoff is borderline and a higher-standoff TVS may be cleaner.","metaTitle":"Diotec 1.5SMCJ43A TVS Diode, 43V standoff, SMC","metaDescription":"Diotec 1.5SMCJ43A unidirectional TVS diode, 43V standoff, 47.8V breakdown, 69.4V clamping, 1.5 kW peak pulse. Strip packaging. Available to order.","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","Capacitance @ Frequency":"-","Supplier Device Package":"SMC/DO-214AB","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"47.8V","Voltage - Clamping (Max) @ Ipp":"69.4V","Voltage - Reverse Standoff (Typ)":"43V","Current - Peak Pulse (10/1000µs)":"21.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9158","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is 1.5SMCJ43A's listed type on this Circuit Protection line?","answer":"This is a unidirectional polarity device, not bidirectional, so it protects a single polarity rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ43A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ43A 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}}