{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6009B","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6009B","canonicalUrl":"https://icboms.com/microchip/1N6009B","factsUrl":"https://icboms.com/api/mcp/products/1N6009B","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6009B Zener diode, 24 V, 500 mW, ±5% tolerance, DO-204AH (DO-35) axial, Bulk.","salesMarkdown":"## Obsolete — sourcing the 24V 500mW DO-35 Zener Microchip Technology lists the 1N6009B as Obsolete. Zener voltage is 24 V nominal with a ±5% tolerance — the actual clamp voltage for a given part lands between 22.8 V and 25.2 V. That spread matters when the Zener sets a supply rail or protects a 24 V bus; the worst-case low side may not hold off a 23 V rail. Power dissipation is 500 mW maximum. In a 24 V shunt regulator, that limits the steady-state current to about 20 mA — beyond that the junction temperature climbs past the 175°C absolute maximum. Maximum Zener impedance (Zzt) is 62 Ohms — this is the dynamic resistance at the test current. A 62-Ω Zzt means the regulation voltage shifts about 62 mV per mA of load change, so this part is a clamp or protection device, not a precision reference. ## DO-35 axial — what it asks of the board The 1N6009B comes in the DO-204AH (DO-35) axial-lead package, supplied in Bulk. Through-hole mounting with 0.020-inch diameter leads — the hole size on the PCB should be 0.031 to 0.035 inch for a reliable solder fillet. Operating temperature range is -65°C to +175°C, which covers military and industrial thermal profiles. The 175°C junction limit is the hard ceiling; derate power above 25°C per the standard Zener derating curve.","metaTitle":"1N6009B Zener Diode 24V 500mW DO-35 Obsolete","metaDescription":"Microchip 1N6009B Zener diode, 24V nominal, 500mW, ±5% tolerance, DO-35 axial. Obsolete — sourced to order against RFQ through independent channels.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Series":"-","Package":"Bulk","Tolerance":"±5%","Power - Max":"500 mW","Mounting Type":"Through Hole","Package / Case":"DO-204AH, DO-35, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"1N6009","Impedance (Max) (Zzt)":"62 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"DO-35","Voltage - Zener (Nom) (Vz)":"24 V","Current - Reverse Leakage @ Vr":"100 nA @ 18 V","Voltage - Forward (Vf) (Max) @ If":"1.1 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/87171d2e12030478252c3bb19e7c6e91.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6009B/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the 1N6009B?","answer":"Functional equivalents with the same 24 V, 500 mW, DO-35 rating exist from other manufacturers, but the BOM position must be validated against the original design's tolerance and impedance requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6009B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6009B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T05:18:31.125Z","lastPublished":"2026-07-21T05:18:31.125Z","indexable":true}}