{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6003A","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6003A","canonicalUrl":"https://icboms.com/microchip/1N6003A","factsUrl":"https://icboms.com/api/mcp/products/1N6003A","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6003A Zener diode, 13 V nominal, 500 mW, ±10% tolerance, DO-204AH (DO-35) axial leaded, through-hole, Bulk.","salesMarkdown":"The 1N6003A is a 13 V Zener diode in a DO-35 axial-leaded package, rated for 500 mW continuous power dissipation. That 500 mW ceiling sets the thermal budget: in free air at 25°C the part can pass about 38 mA before junction temperature becomes the limiter; at 175°C the allowable current drops to near zero. For a 13 V rail clamp or a simple shunt regulator, the load current plus the Zener current must stay under that dissipation curve. The ±10% tolerance on Vz means the actual Zener voltage for any given unit falls between 11.7 V and 14.3 V. That spread is fine for transient suppression or general-purpose voltage reference, but for a precision bias circuit you would reach for a tighter-tolerance Zener or a band-gap reference instead. ## Board integration — DO-35 axial leaded The DO-35 (DO-204AH) body is 0.166 inches long with 0.020-inch diameter leads — a standard through-hole footprint that hand-solders or wave-solders without special profile. The axial leads bend to 0.300-inch or 0.400-inch hole spacing; the cathode band marks the negative side. The junction-to-ambient thermal resistance for a DO-35 in still air is roughly 200°C/W — at 500 mW the junction sits 100°C above ambient, so at 175°C ambient the part is at its absolute limit. ## Leakage and forward drop — the secondary specs that matter Reverse leakage is 100 nA maximum at 8.4 V reverse voltage — that is 65% of the nominal Zener voltage. For a high-impedance bias string drawing microamps, this leakage is negligible; for a 10 kΩ pull-up it adds less than 1 mV of error. Forward voltage is 1.1 V maximum at 200 mA forward current — the part conducts as a standard silicon diode in the forward quadrant, useful if the circuit needs a low-cost clamp in both polarities. Maximum Zener impedance (Zzt) is 36 Ohms at the test current — this is the dynamic resistance at the Zener knee. A 36 Ω impedance means the Zener voltage shifts about 360 mV per 10 mA of current change, which matters for line regulation in a shunt regulator.","metaTitle":"Microchip 1N6003A Zener Diode, 13 V, 500 mW, DO-35","metaDescription":"1N6003A Zener diode from Microchip Technology: 13 V nominal, 500 mW, DO-35 axial package, ±10% tolerance, -65°C to 175°C. Active production, 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":"±10%","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":"1N6003","Impedance (Max) (Zzt)":"36 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"DO-35","Voltage - Zener (Nom) (Vz)":"13 V","Current - Reverse Leakage @ Vr":"100 nA @ 8.4 V","Voltage - Forward (Vf) (Max) @ If":"1.1 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.9200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/87171d2e12030478252c3bb19e7c6e91.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6003A/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance on the Zener voltage?","answer":"The tolerance is ±10% on the 13 V nominal Vz, so the actual Zener voltage for any unit is between 11.7 V and 14.3 V. This is a standard commercial tolerance; for tighter regulation a band-gap reference or a selected Zener would be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6003A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6003A 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}}