{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ12A933","brand":"onsemi","brandSlug":"onsemi","productSlug":"SMBJ12A933","canonicalUrl":"https://icboms.com/onsemi/SMBJ12A933","factsUrl":"https://icboms.com/api/mcp/products/SMBJ12A933","rawCanonicalId":null},"summary":{"shortDescription":"onsemi SMBJ series, Zener TVS diode, 600W peak pulse power, 13.3V min breakdown, 12V reverse standoff, single unidirectional channel, DO-214AA SMB surface mount","salesMarkdown":"## Transient protection for a 12V rail — what the ratings tell you The SMBJ12A933: Its 13.3V minimum breakdown voltage means it starts conducting just above the 12V reverse standoff, shunting surge current before the protected circuitry sees damaging overvoltage. Rated for 600W peak pulse power at a 10/1000µs waveform, this part can absorb a 30.2A peak pulse current — enough for a typical industrial surge on a 12V bus, but not a direct lightning strike without additional series impedance. The 19.9V maximum clamping voltage is the ceiling the downstream components must survive; a 12V-to-3.3V regulator with a 20V abs-max input would be marginal here. onsemi lists the SMBJ12A933 as Obsolete. ## Package and footprint — what to match in a replacement A pin-compatible replacement must share this footprint and the single unidirectional channel configuration. The supplier device package is DO-214AA (SMB); the mounting type is Surface Mount. No power line protection is provided — this is a signal-rail or low-side supply clamp, not a mains-side protector.","metaTitle":"SMBJ12A933 onsemi TVS Diode – Obsolete, Replacement & Specs","metaDescription":"onsemi SMBJ12A933 Zener TVS, 600W peak pulse, 13.3V breakdown, DO-214AA SMB. Obsolete – find replacement and source surplus here.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"SMBJ","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"600W","Base Product Number":"SMBJ","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AA (SMB)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"13.3V","Voltage - Clamping (Max) @ Ipp":"19.9V","Voltage - Reverse Standoff (Typ)":"12V","Current - Peak Pulse (10/1000µs)":"30.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"How can I order the SMBJ12A933 or check availability?","answer":"The SMBJ12A933 is obsolete. We source it through independent surplus channels — submit an RFQ with your target quantity and we will confirm availability and pricing at quote time. No stock-holding claim is made; every lot is verified before shipment."},{"question":"Is the SMBJ12A933 obsolete or still active?","answer":"Obsolete. onsemi has discontinued this exact order code. No new production is planned."},{"question":"What package does the SMBJ12A933 come in?","answer":"DO-214AA (SMB) surface-mount package, supplied in Tape & Reel (TR)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/SMBJ12A933","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/SMBJ12A933 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-18T13:48:37.709Z","lastPublished":"2026-07-18T13:48:37.709Z","indexable":true}}