{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ20A-13","brand":"Diodes Incorporated","brandSlug":"diodes-inc","productSlug":"SMAJ20A-13","canonicalUrl":"https://icboms.com/diodes-inc/SMAJ20A-13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ20A-13","rawCanonicalId":null},"summary":{"shortDescription":"Diodes Incorporated SMAJ20A-13 TVS Zener diode, 20V reverse standoff, 32.4V clamp, 400W peak pulse power, DO-214AC SMA package, Tape & Reel.","salesMarkdown":"## Clamping and breakdown — what the ratings mean for your rail The SMAJ20A-13: This is the maximum continuous DC voltage the device can withstand without conducting — a 20 V rail or a 12 V system with transients up to 20 V stays below the leakage threshold. The 32.4 V clamp means a 24 V nominal rail sees the TVS hold the surge to about 35% above the rail — the downstream components must survive that peak for the pulse duration. The 12.3 A peak current is the maximum the device can shunt; if the source impedance is lower, the TVS may exceed its peak current rating and fail short. ## DO-214AC SMA — board-fit and thermal note This is a standard footprint shared across the SMAJ series — the cathode tab on the larger pad carries the heat into the PCB copper pour. The junction temperature limit of 150°C means the 400 W pulse derates above 25°C ambient — at 85°C the peak pulse power is roughly 60% of the 25°C rating, per the standard derating curve for this package family. ## General-purpose protection — where it fits The SMAJ20A-13 is classified for general-purpose applications — it is not a dedicated automotive-grade (AEC-Q) or power-line protection device (power line protection is listed as No,). Typical deployment is on low-voltage DC rails in industrial controls, telecom equipment, or consumer electronics where a 20 V standoff and 32.4 V clamp suit the rail voltage.","metaTitle":"SMAJ20A-13 Diodes Inc TVS, 20V Standoff, 32.4V Clamp","metaDescription":"SMAJ20A-13 TVS diode, 20V reverse standoff, 32.4V clamp, 400W peak pulse, DO-214AC SMA. Obsolete — sourced to order against RFQ. Diodes Incorporated.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Diodes Incorporated","Type":"Zener","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"400W","Base Product Number":"SMAJ20","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMA","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"22.2V","Voltage - Clamping (Max) @ Ipp":"32.4V","Voltage - Reverse Standoff (Typ)":"20V","Current - Peak Pulse (10/1000µs)":"12.3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a6e414533ed6f0f7c15ae6d19d66ae3c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does the SMAJ20A-13 come in?","answer":"The SMAJ20A-13 is supplied in the DO-214AC (SMA) surface-mount package, with the supplier device package also listed as SMA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diodes-inc/SMAJ20A-13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diodes-inc/SMAJ20A-13 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-19T21:37:26.606Z","lastPublished":"2026-07-19T21:37:26.606Z","indexable":true}}