{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4744CPE3/TR8","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4744CPE3-TR8","canonicalUrl":"https://icboms.com/microchip/1N4744CPE3-TR8","factsUrl":"https://icboms.com/api/mcp/products/1N4744CPE3%2FTR8","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4744CPE3/TR8 zener diode, 15 V nominal, 1 W, ±2% tolerance, DO-204AL (DO-41) axial lead, Tape & Reel.","salesMarkdown":"## 15 V regulation with ±2% precision The 1N4744CPE3/TR8 is a 15 V zener diode rated for 1 W continuous power dissipation in the DO-204AL (DO-41) axial-lead package. The ±2% tolerance on the nominal voltage means this part holds the regulation point tighter than the standard 5% grade — relevant when the zener serves as a shunt reference for an ADC supply or a bias rail where a few hundred millivolts of drift affects circuit accuracy. Maximum zener impedance is 14 Ohms at the test current. Lower impedance means the voltage stays flatter across the operating current range — a 14 Ohm Zzt is typical for a 1 W, 15 V part and keeps the regulation within the tolerance band over the full rated current swing. Reverse leakage is specified at 5 µA maximum with 11.4 V applied across the junction — that is 76% of the nominal zener voltage. For a bias network or a bleeder circuit, this leakage floor tells you how much current the zener draws before it enters breakdown; below that voltage the part is essentially an open circuit. ## Temperature range and board fit The 1 W power rating assumes the leads are soldered into a standard FR-4 board with adequate copper area to sink heat; in free air without a heatsink the derating curve applies above 50°C ambient. Forward voltage is 1.2 V maximum at 200 mA — this is the conduction drop when the diode is forward-biased, not the zener region. It matters if the part sees a forward surge during power-up or reverse-polarity events; the 1.2 V drop at 200 mA is well within the 1 W dissipation budget for short-duration transients. ## Active lifecycle — sourcing posture The Tape & Reel (TR) packaging option supports automated through-hole insertion — the axial leads are taped on reel for pick-and-place or radial-insertion machines, reducing manual handling cost in volume assembly.","metaTitle":"1N4744CPE3/TR8 Zener Diode, 15 V, 1 W, ±2%, DO-41","metaDescription":"Microchip Technology 1N4744CPE3/TR8 zener diode, 15 V nominal, 1 W, ±2% tolerance, DO-204AL (DO-41) axial lead, -65 to 150°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±2%","Power - Max":"1 W","Mounting Type":"Through Hole","Package / Case":"DO-204AL, DO-41, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"1N4744","Impedance (Max) (Zzt)":"14 Ohms","Operating Temperature":"-65°C~150°C","Supplier Device Package":"DO-204AL (DO-41)","Voltage - Zener (Nom) (Vz)":"15 V","Current - Reverse Leakage @ Vr":"5 µA @ 11.4 V","Voltage - Forward (Vf) (Max) @ If":"1.2 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f2579cdb7aec091d0b5f99df5459e04c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the tolerance and power rating of the 1N4744CPE3/TR8?","answer":"The nominal zener voltage is 15 V with a ±2% tolerance — tighter than the standard 5% grade. Maximum continuous power dissipation is 1 W."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4744CPE3-TR8","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4744CPE3-TR8 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}}