{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"P6SMB51CAT3","brand":"onsemi","brandSlug":"onsemi","productSlug":"P6SMB51CAT3","canonicalUrl":"https://icboms.com/onsemi/P6SMB51CAT3","factsUrl":"https://icboms.com/api/mcp/products/P6SMB51CAT3","rawCanonicalId":null},"summary":{"shortDescription":"onsemi P6SMB51CAT3, Zener TVS diode, Automotive AEC-Q101, 600W peak pulse power, 43.6V reverse standoff, bidirectional, DO-214AA (SMB) surface mount","salesMarkdown":"## Automotive Zener TVS — what this part is It is a bidirectional device with a single protection channel, clamping at 70.1V max from a 43.6V reverse standoff voltage. This is the qualification that separates it from a standard commercial TVS. onsemi lists the P6SMB51CAT3 as Obsolete. SMB is a standard footprint; if you are looking for a production-active alternative, the SMB package is widely used across the P6SMB family and other TVS series from onsemi and Littelfuse. The 43.6V reverse standoff voltage is the maximum DC voltage the protected line can carry without the TVS conducting. For a 48V nominal automotive bus (e.g., a 48V mild-hybrid rail or a 48V telecom feed), this part would start to clamp above that level — make sure your operating voltage stays below 43.6V. Clamping at 70.1V max with an 8.6A peak pulse current defines the voltage the downstream circuitry must survive during a transient. If your load's absolute-max rating is below 70V, this TVS may not protect it adequately. The 205 pF capacitance at 1 MHz matters for signal integrity on high-speed data lines (CAN FD, FlexRay, Ethernet). At 205 pF, it will load the bus; for lower-capacitance needs, look at a dedicated ESD diode with <10 pF.","metaTitle":"P6SMB51CAT3 onsemi Zener TVS – Obsolete, AEC-Q101, 600W","metaDescription":"P6SMB51CAT3 is an obsolete onsemi Zener TVS diode, AEC-Q101 qualified, 600W peak pulse, 43.6V reverse standoff, DO-214AA (SMB). Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"Automotive, AEC-Q101","Package":"Tape & Reel (TR)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"600W","Base Product Number":"P6SMB","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"205pF @ 1MHz","Supplier Device Package":"SMB","Voltage - Breakdown (Min)":"48.5V","Voltage - Clamping (Max) @ Ipp":"70.1V","Voltage - Reverse Standoff (Typ)":"43.6V","Current - Peak Pulse (10/1000µs)":"8.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7982f44255cb5d90f9a69b1cf2fcf475.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for P6SMB51CAT3?","answer":"onsemi has not published a direct successor for the P6SMB51CAT3. For a production-active alternative, consider the P6SMB51CAT3G (the lead-free variant, same electrical specs) if you can find inventory, or cross to a Littelfuse SMBJ series part with similar breakdown and standoff ratings. Confirm the AEC-Q101 qualification if automotive-grade is required."},{"question":"Is P6SMB51CAT3 lead-free?","answer":"The P6SMB51CAT3 base order code does not carry the 'G' suffix that onsemi uses for lead-free / RoHS-compliant parts. The P6SMB51CAT3G is the lead-free version. Check the date code and manufacturer's marking on your reel to confirm compliance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/P6SMB51CAT3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/P6SMB51CAT3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:24:53.527Z","lastPublished":"2026-07-17T20:24:53.527Z","indexable":true}}