{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ30CA-AQ","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ30CA-AQ","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ30CA-AQ","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ30CA-AQ","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor 1.5SMCJ30CA-AQ, bidirectional Zener TVS diode, DO-214AB (SMC) surface-mount, 30V standoff, 1.5kW peak pulse, AEC-Q automotive grade, -50°C to 150°C junction.","salesMarkdown":"## What this part is and what the ratings mean The 1.5SMCJ30CA-AQ: This is a bidirectional Zener-based TVS diode — the 1.5SMCJ suffix marks it as a unidirectional polarity TVS in the 1.5 kW peak-pulse class. That 18.4V differential (48.4 minus 30) is the transient headroom the device absorbs before it limits. The 31A peak pulse rating (10/1000 µs waveform) defines the surge current the diode survives without degradation — the 1.5 kW rating at that pulse width is the thermal ceiling for a single-event transient, not a continuous power rating. A longer-duration or higher-current surge trips the clamping ceiling faster because the I²R heating in the junction scales with the square of the pulse current. ## Automotive fit — the -AQ grade matters here The -AQ suffix is Diotec's automotive qualification marker — operating temperature is rated to 150°C junction, which puts this squarely in the under-hood thermal band. A 12V automotive rail can see load-dump transients well above the 30V standoff; the TVS clamps those transients and protects the ECU input stage from ISO 7637-2 style surge events. At -50°C minimum junction temperature, the diode also survives cold-start conditions — a discharged battery at -20°C still delivers a stiff 12V rail, but wiring harness inductance can produce negative spikes during disconnection that the TVS must clamp without latch-up. ## Package, mounting, and board fit DO-214AB (SMC) is the standard industry footprint — the land pattern is universal across 1.5SMCJ-family parts, so swapping to a different standoff voltage or a second-source 1.5SMCJ30C variant requires no board spin. Solder joint thermal cycling is the failure mechanism to watch on automotive boards; the junction-to-lead thermal resistance governs how quickly the die reaches equilibrium under repeated pulse loading. Surface-mount on a strip pack — the DO-214AB package is pick-and-place compatible with standard SMT lines, and the wide lead-free plating on the termination tabs handles reflow profiles to 260°C peak.","metaTitle":"Diotec 1.5SMCJ30CA-AQ TVS Diode, 30V standoff, 1.5kW peak","metaDescription":"1.5SMCJ30CA-AQ — bidirectional Zener TVS in DO-214AB, 30V standoff, 48.4V clamping at 31A. AEC-Q automotive grade, -50°C to 150°C junction. Active production.","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":"Automotive","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)":"33.3V","Voltage - Clamping (Max) @ Ipp":"48.4V","Voltage - Reverse Standoff (Typ)":"30V","Current - Peak Pulse (10/1000µs)":"31A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9260","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMCJ30CA-AQ/alternatives.json"},"ai":{"faq":[{"question":"How do I source 1.5SMCJ30CA-AQ and get current pricing?","answer":"For BOM quantities or repeat-order schedules, an RFQ is the fastest path to a firm price and lead-time commitment."},{"question":"What is the difference between the unidirectional and bidirectional TVS diode variants in this series?","answer":"A unidirectional variant clamps only one polarity and is typically used on a referenced ground rail. Both share the same DO-214AB footprint and 1.5 kW peak-pulse rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ30CA-AQ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ30CA-AQ 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}}