{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ18A","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ18A","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ18A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ18A","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor 1.5SMCJ18A unidirectional TVS/Zener diode, DO-214AB (SMC) surface-mount, 18 V standoff, 29.2 V max clamping, 1.5 kW peak pulse, 51.4 A peak pulse, -50°C to 150°C junction.","salesMarkdown":"The 1.5SMCJ18A is a unidirectional TVS diode in the DO-214AB (SMC) package — it clamps a transient event by turning on at the breakdown voltage and steering surge current away from the protected node. With an 18 V reverse standoff (typ) and a minimum breakdown of 20 V, the device idles off until a voltage spike exceeds that window. Once triggered, the clamping voltage maxes out at 29.2 V while the peak pulse current reaches 51.4 A — that is the absorption window the downstream IC never sees. A test bench engineer sweeping the I-V curve will see the device transition from leakage (below 18 V) through avalanche (20 V and up) to active clamp at 29.2 V — that 9 V gap between standoff and clamp is the protection headroom. Junction temp at 150°C is the limiting parameter — the clamping voltage and peak pulse current specs are all characterised at 25°C, so a hot-board transient event at 125°C ambient will clamp at a slightly higher voltage as the Zener knee drifts. The datasheet curves capture that shift; board-level derating is the integrator's call based on the actual transient energy budget. ## Sourcing and part identity No official cross-reference or pin-compatible successor is listed for this specific order code. The Diotec SMC TVS series shares the same DO-214AB footprint and pinout across multiple standoff voltages, so a board spin is not required when migrating between ratings within the series — but any BOM change of this specific order code should be confirmed against the current draw and clamping voltage budget of the target circuit.","metaTitle":"Diotec 1.5SMCJ18A TVS Diode, 1.5 kW, 18 V standoff, DO-214AB","metaDescription":"Diotec 1.5SMCJ18A unidirectional TVS/Zener in DO-214AB (SMC). 18 V standoff, 29.2 V clamping, 1.5 kW peak pulse, 51.4 A peak pulse current. Active.","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)":"20V","Voltage - Clamping (Max) @ Ipp":"29.2V","Voltage - Reverse Standoff (Typ)":"18V","Current - Peak Pulse (10/1000µs)":"51.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9158","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMCJ18A/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Diotec Semiconductor provide for the 1.5SMCJ18A?","answer":"The evidence does not list specific compliance certifications (RoHS, REACH, UL, IEC) for this order code. Compliance documentation should be requested directly from Diotec Semiconductor or the authorised distribution channel at RFQ — the datasheet or product quality report will confirm the applicable standards for the target jurisdiction and application environment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ18A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ18A when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-14T23:42:07.612Z","lastPublished":"2026-09-14T23:42:07.612Z","indexable":true}}