{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ120CE3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMAJ120CE3-TR13","canonicalUrl":"https://icboms.com/microchip/SMAJ120CE3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ120CE3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology SMAJ120CE3/TR13, Zener TVS Diode, 120 V Reverse Standoff, 214 V Clamp, 500 W Peak Pulse, Bidirectional, DO-214AC (SMA), Tape & Reel","salesMarkdown":"## 120 V rail surge clamp in a single SMA package With a peak pulse power rating of 500 W (10/1000 µs waveform), it handles surge events up to 2.3 A peak pulse current before the clamp voltage reaches 214 V. The single bidirectional channel protects against both positive and negative overvoltage events, eliminating the need for two unidirectional devices and simplifying the PCB layout. ## Standoff, breakdown, and clamp — the protection window The minimum breakdown voltage is 133 V, so the diode starts clamping just above the normal operating range. At the full 2.3 A peak pulse current, the clamp voltage is 214 V max, which defines the voltage stress the downstream components must survive. This 94 V window between standoff and clamp gives a comfortable margin for a 120 V bus with typical ±10 % tolerance, but the clamp voltage is high enough that the protected circuitry should be rated for at least 250 V transient withstand. ## DO-214AC footprint and reflow considerations Housed in the DO-214AC (SMA) package, this diode is a surface-mount device compatible with standard reflow soldering profiles. The SMA footprint is common across many TVS families, so PCB layout reuse across different voltage ratings in the SMAJ series is straightforward. The wide temperature margin means derating for ambient heat is minimal in most applications, but the 500 W peak pulse rating is specified at 25°C — derate per the datasheet curve above that.","metaTitle":"SMAJ120CE3/TR13 TVS Diode – 120 V Bidirectional, 500 W","metaDescription":"Microchip SMAJ120CE3/TR13 Zener TVS: 120 V standoff, 214 V clamp, 500 W peak pulse, bidirectional, DO-214AC. Active production.","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":"SMAJ120","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AC (SMA)","Voltage - Breakdown (Min)":"133V","Voltage - Clamping (Max) @ Ipp":"214V","Voltage - Reverse Standoff (Typ)":"120V","Current - Peak Pulse (10/1000µs)":"2.3A"}},"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":"Is SMAJ120CE3/TR13 a bidirectional TVS diode?","answer":"Yes, it has one bidirectional channel, meaning it clamps both positive and negative transients with a single device. This is confirmed by the 'C' in the part number (SMAJ120C), which is Microchip's convention for bidirectional in this series."},{"question":"What is the peak pulse power of SMAJ120CE3/TR13?","answer":"The corresponding peak pulse current at that waveform is 2.3 A."},{"question":"What is the closest alternative to SMAJ120CE3/TR13 in the same family?","answer":"Within the SMAJ series from Microchip, the unidirectional variant SMAJ120A (or SMAJ120AE3/TR13) shares the same 120 V standoff, 500 W rating, and DO-214AC package, but protects only one polarity. For a bidirectional replacement, any SMAJ120C variant from Microchip with the same package and voltage rating is a direct functional match. Confirm the exact ordering code suffix for packaging and environmental compliance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMAJ120CE3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMAJ120CE3-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}}