{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6321US/TR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6321US-TR","canonicalUrl":"https://icboms.com/microchip/1N6321US-TR","factsUrl":"https://icboms.com/api/mcp/products/1N6321US%2FTR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology Zener diode, 1N6321US/TR, 7.5 V nominal, ±5% tolerance, 500 mW, SQ-MELF B package, Tape & Reel.","salesMarkdown":"## 7.5 V Zener in a hermetic SQ-MELF package The 1N6321US/TR is a 7.5 V Zener diode rated for 500 mW continuous power dissipation, housed in a hermetic SQ-MELF (B) package. The ±5% tolerance on the nominal Zener voltage gives a regulation window of 7.125 V to 7.875 V, which matters for precision clamping or reference applications where the rail must stay within a tight band. The SQ-MELF case is a surface-mount ceramic package with metallized end caps, designed for high-reliability soldering onto a PCB or hybrid substrate. The -65°C to 175°C junction temperature range suits it for avionics, downhole, or satellite power bus conditioning where the ambient swings wide. ## Zener impedance and leakage — what limits the regulation Maximum dynamic impedance (Zzt) is 4 Ohms at the Zener test current. A lower Zzt means the output voltage shifts less under varying load current — at 10 mA load swing the output moves under 40 mV, keeping the rail stable for sensitive analog supplies. Reverse leakage is specified at 2 µA maximum at 5 V reverse bias. For a 7.5 V rail that is 33% below the breakdown knee, the leakage stays negligible — a 5 V bias on the Zener draws less than 2 µA, so it will not load down a high-impedance sensing node. Forward voltage is 1.4 V maximum at 1 A forward current. This means the die can also serve as a high-current rectifier in the forward direction — the 500 mW power limit still applies, so the forward current must stay within the thermal budget.","metaTitle":"1N6321US/TR Zener Diode 7.5V 500mW SQ-MELF","metaDescription":"Microchip Technology 1N6321US/TR Zener diode, 7.5V nominal, ±5% tolerance, 500mW, SQ-MELF B package, -65 to 175°C. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±5%","Power - Max":"500 mW","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, B","Product Status":"Active","lifecycle_stage":"eol_hot","Impedance (Max) (Zzt)":"4 Ohms","Operating Temperature":"-65°C ~ 175°C (TJ)","Supplier Device Package":"B, SQ-MELF","Voltage - Zener (Nom) (Vz)":"7.5 V","Current - Reverse Leakage @ Vr":"2 µA @ 5 V","Voltage - Forward (Vf) (Max) @ If":"1.4 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$12.8400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/950a1a5ef1d17a0e9b75efb616fa4721.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6321US%2FTR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1N6321US/TR?","answer":"The 1N6321US/TR is a Microchip Technology branded device; any functional replacement would require reviewing the Zener voltage, tolerance, power rating, and SQ-MELF package from another vendor's catalog."},{"question":"What package does the 1N6321US/TR use?","answer":"It ships in Tape & Reel format."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6321US-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6321US-TR 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}}