{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6323US","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6323US","canonicalUrl":"https://icboms.com/microchip/1N6323US","factsUrl":"https://icboms.com/api/mcp/products/1N6323US","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology Zener diode, 1N6323US, 9.1 V, 500 mW, ±5% tolerance, SQ-MELF surface mount, -65°C to 175°C.","salesMarkdown":"## 9.1 V regulation in a hermetic MELF The 1N6323US is a 9.1 V Zener diode rated for 500 mW continuous power dissipation, housed in a hermetically sealed SQ-MELF package (B suffix). The ±5% tolerance on the nominal voltage means the actual Zener voltage falls between 8.645 V and 9.555 V at the test current — a band tight enough for reference or clamping in precision analog rails. The junction sees the full range in avionics, down-hole tools, or satellite power buses where the ambient swings from cold-soak to near-engine-bay heat. ## Surface-mount hermetic — the SQ-MELF footprint The SQ-MELF (B case) is a surface-mount package with metallized end caps, no leads to fatigue under thermal cycling. Solder the diode flat to the board pad — the end-cap solder fillet carries the current; the body is ceramic-glass sealed against moisture and particle ingress. Board layout should keep the trace width adequate for the 500 mW dissipation at the operating ambient. For a 9.1 V rail the Zener conducts roughly 55 mA at full rated power; the copper pad area under the package acts as the primary heat spreader. ## Leakage and forward characteristics Reverse leakage is specified at 1 µA maximum with 7 V applied across the junction — 2.1 V below the nominal Zener voltage, so the diode stays well into the leakage region before breakdown. Forward voltage drop is 1.4 V maximum at 1 A forward current, a figure that matters if the diode sees surge or reverse-polarity events. Maximum Zener impedance (Zzt) is 500 Ohms. This is the dynamic resistance at the test current; a higher Zzt means the regulation voltage shifts more with current variation, so the diode is best paired with a current source or ballast resistor for reference duty.","metaTitle":"1N6323US Zener Diode, 9.1 V, 500 mW, SQ-MELF, Microchip","metaDescription":"Microchip Technology 1N6323US Zener diode, 9.1 V nominal, 500 mW, ±5% tolerance, SQ-MELF surface mount, -65 to 175°C. Active, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Series":"-","Package":"Bulk","Tolerance":"±5%","Power - Max":"500 mW","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, B","lifecycle_stage":"eol_hot","Impedance (Max) (Zzt)":"500 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"B, SQ-MELF","Voltage - Zener (Nom) (Vz)":"9.1 V","Current - Reverse Leakage @ Vr":"1 µA @ 7 V","Voltage - Forward (Vf) (Max) @ If":"1.4 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$13.1300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/950a1a5ef1d17a0e9b75efb616fa4721.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6323US/alternatives.json"},"ai":{"faq":[{"question":"How can I order the 1N6323US or check availability?","answer":"The 1N6323US is an active Microchip Technology Zener diode. Submit an RFQ for a firm lead-time and price."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6323US","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6323US 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}}