{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6633US","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6633US","canonicalUrl":"https://icboms.com/microchip/1N6633US","factsUrl":"https://icboms.com/api/mcp/products/1N6633US","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6633US Zener diode, 3.6 V nominal, 5 W, ±5% tolerance, E-MELF surface mount, D-5B package.","salesMarkdown":"## 3.6 V rail clamp or reference in a hermetic surface-mount package The 1N6633US is a 3.6 V Zener diode rated for 5 W continuous dissipation in the E-MELF (D-5B) hermetic surface-mount package. The 3.6 V nominal breakdown at ±5% tolerance sets the regulation window for a low-voltage rail clamp or shunt reference, while the 5 W power rating means the junction-to-solder thermal path through the E-MELF end-cap terminations must carry the full dissipation — the copper pad area on the board sets the real-world derating. ## Reverse leakage and forward drop — the bias-circuit checkpoints Reverse leakage is 250 µA maximum at 1 V reverse — well below the Zener knee, so a bias resistor string that holds the diode at 1 V sees negligible current draw. Forward voltage is 1.5 V maximum at 1 A, which matters if the diode sees surge current in the forward direction during a reverse-polarity event. Maximum Zener impedance (Zzt) is 500 Ohms at the test current; this sets the dynamic resistance the downstream circuit sees as the Zener regulates. A 500-Ohm impedance at 3.6 V means the output shifts about 0.5 V per mA of load change — adequate for a clamp or a low-accuracy reference, but not for a precision bias rail.","metaTitle":"Microchip 1N6633US Zener Diode, 3.6 V, 5 W, E-MELF","metaDescription":"Microchip 1N6633US Zener diode: 3.6 V nominal, 5 W, ±5% tolerance, E-MELF surface mount, -65°C 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":"Bulk","Tolerance":"±5%","Power - Max":"5 W","Mounting Type":"Surface Mount","Package / Case":"E-MELF","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"1N6633","Impedance (Max) (Zzt)":"500 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"D-5B","Voltage - Zener (Nom) (Vz)":"3.6 V","Current - Reverse Leakage @ Vr":"250 µA @ 1 V","Voltage - Forward (Vf) (Max) @ If":"1.5 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$21.2700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d8f5875a647571c98402a6a536757bfe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6633US/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance and power rating of the 1N6633US?","answer":"The Zener voltage tolerance is ±5%, and the continuous power dissipation is 5 W. The 5 W rating assumes adequate board-level thermal management; the E-MELF package relies on the solder joint and copper pad area to sink heat."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6633US","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6633US 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}}