{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ18AE3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMAJ18AE3-TR13","canonicalUrl":"https://icboms.com/microchip/SMAJ18AE3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ18AE3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology SMAJ18AE3/TR13, Zener TVS diode, 18V reverse standoff, 29.2V clamp, 500W peak pulse power, DO-214AC (SMA) package, Tape & Reel","salesMarkdown":"Its 500W peak pulse power rating (10/1000µs waveform) means it can absorb a 17.2A surge without failing — the clamping voltage holds at 29.2V max, which is the ceiling the downstream circuitry must survive. This is a general-purpose protection device suited for DC power buses, signal lines, and I/O ports in industrial controls, telecom gear, and power supplies. The DO-214AC (SMA) surface-mount package keeps the footprint small and reflow-compatible. ## Key ratings that define the protection margin Breakdown occurs at 20V min, so a 18V rail with 10% tolerance (19.8V max) stays below the trigger threshold. Clamping at 29.2V sets the voltage the load sees during a surge. If your downstream components are rated for 30V absolute max, this TVS buys you 0.8V of headroom — tight. The 17.2A peak pulse current is the surge current the diode shunts; the 500W peak pulse power is the product of clamp voltage and current, and it defines the thermal capability for a single 10/1000µs event. ## Active production — sourcing and compliance The suffix indicates lead-free and RoHS-compliant construction. The DO-214AC (SMA) package is shared across the SMAJ family, so a cross to SMAJ18A (the non- variant) is electrically identical if your assembly process allows standard tin-lead finish.","metaTitle":"SMAJ18AE3/TR13 Zener TVS Diode – 18V Standoff, 500W","metaDescription":"SMAJ18AE3/TR13 Zener TVS diode from Microchip Technology. 18V reverse standoff, 29.2V clamp, 500W peak pulse power. Active production, DO-214AC (SMA) package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Microchip Technology","Type":"Zener","Series":"-","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"500W","Base Product Number":"SMAJ18","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AC (SMA)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"20V","Voltage - Clamping (Max) @ Ipp":"29.2V","Voltage - Reverse Standoff (Typ)":"18V","Current - Peak Pulse (10/1000µs)":"17.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7b3ddece4863b4621debe180df56adc8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can SMAJ18AE3/TR13 be replaced with SMAJ18A?","answer":"Electrically, yes — the SMAJ18A is the standard tin-lead version of the same Zener TVS die in the same DO-214AC package. The SMAJ18AE3/TR13 is the lead-free variant. Confirm your assembly's solder alloy and reflow profile before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMAJ18AE3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMAJ18AE3-TR13 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}}