{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4582A-1","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4582A-1","canonicalUrl":"https://icboms.com/microchip/1N4582A-1","factsUrl":"https://icboms.com/api/mcp/products/1N4582A-1","rawCanonicalId":null},"summary":{"shortDescription":"1N4582A-1 Zener diode, 6.4 V nominal, ±5% tolerance, 500 mW max power, DO-204AH (DO-35) axial package, through-hole mounting, -65°C to 175°C operating temperature.","salesMarkdown":"## 6.4 V Zener, 500 mW — DO-35 axial The 1N4582A-1 is a 6.4 V Zener diode in the DO-35 axial-lead package, rated for 500 mW maximum power dissipation. The ±5% tolerance on the Zener voltage means the regulation point sits between 6.08 V and 6.72 V at the specified test current — tight enough for most reference and clamping circuits in industrial control and instrumentation. ## 25 Ω impedance — what it means for regulation Maximum Zener impedance (Zzt) is 25 Ω. This is the dynamic resistance at the nominal Zener current; a lower impedance means tighter voltage regulation under varying load current. For a 10 mA change in current through the diode, the voltage shifts by roughly 250 mV — acceptable for general-purpose clamping and simple shunt regulation, but not for precision references where a lower-impedance Zener or a bandgap device would be chosen. ## Temperature range and mounting Rated for -65°C to 175°C operating junction temperature — a full military-grade envelope that suits avionics, downhole instrumentation, and engine-bay electronics where the ambient can exceed 125°C. The DO-35 axial package is through-hole mounted; leads are tin-plated copper. The 500 mW power derates linearly above 25°C ambient; at 175°C the allowable dissipation drops to zero, so the thermal path to the board (lead length, solder fillet, copper trace area) sets the real power limit. ## Reverse leakage and test conditions Reverse leakage is 2 µA maximum at 3 V reverse voltage — a low-leakage spec that keeps the diode from loading the circuit when it is not conducting. The 3 V test point is roughly half the Zener voltage, so the leakage measurement is taken well below the avalanche knee where leakage is dominated by surface effects rather than multiplication current. ## Active lifecycle — no obsolescence concern The part is RoHS non-compliant (lead-bearing termination finish), which limits its use in EU RoHS-exempt applications but is common for military and high-reliability builds where tin whisker risk is a concern.","metaTitle":"1N4582A-1 Zener Diode, 6.4 V, 500 mW, DO-35, Active","metaDescription":"1N4582A-1 Zener diode, 6.4 V nominal, ±5% tolerance, 500 mW max power, DO-35 axial package. Active lifecycle, -65°C to 175°C range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":[],"specifications":{"Package":"Bulk","Tolerance":"±5%","Power - Max":"500 mW","Mounting Type":"Through Hole","Package / Case":"DO-204AH, DO-35, Axial","lifecycle_stage":"eol_hot","Impedance (Max) (Zzt)":"25 Ohms","Operating Temperature":"-65°C ~ 175°C","Supplier Device Package":"DO-35","Voltage - Zener (Nom) (Vz)":"6.4 V","Current - Reverse Leakage @ Vr":"2 µA @ 3 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.06","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.06000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cd20dc4e1a4ed999bb20a6e5d172ac40.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent for 1N4582A-1?","answer":"No official cross-reference or second-source part is listed in the available records. The 1N4582A-1 is a standard 6.4 V, 500 mW Zener in a DO-35 package; any equivalent would need to match the 6.4 V nominal voltage, ±5% tolerance, 500 mW power rating, and DO-35 axial footprint. Confirm the specific Zener voltage and power requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4582A-1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4582A-1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}