{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4737PE3/TR8","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4737PE3-TR8","canonicalUrl":"https://icboms.com/microchip/1N4737PE3-TR8","factsUrl":"https://icboms.com/api/mcp/products/1N4737PE3%2FTR8","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4737PE3/TR8 Zener diode, 7.5 V nominal, ±10% tolerance, 1 W maximum power, DO-204AL (DO-41) axial package, Tape & Reel.","salesMarkdown":"## 7.5 V Zener, 1 W — the thermal budget in a DO-41 body The 1N4737PE3/TR8 is a 7.5 V Zener diode rated for 1 W continuous power dissipation in the DO-204AL (DO-41) axial-lead package. The 7.5 V nominal is the regulation knee — below that the diode blocks; above it the avalanche breakdown clamps the voltage to within ±10% of the nominal value, making it a straightforward shunt regulator or reference element for low-power rails. The 4 Ω maximum Zener impedance (Zzt) at the test current means the regulation voltage shifts by about 40 mV per mA of load change through the knee — a tighter hold than a higher-impedance Zener, which matters if this diode is the only reference in a 5 V-to-3.3 V regulator feedback divider. ## DO-41 axial — board-mounting and thermal path The DO-204AL (DO-41) body with axial leads is a through-hole package that relies on the lead length and copper pad area for heat sinking. At 1 W dissipation the junction-to-ambient thermal resistance is typically 100–150 °C/W depending on lead length and board copper; in free air with 1/2-inch leads the junction sits about 100 °C above ambient at full rated power. The Tape & Reel (TR) packaging option (the /TR suffix) means the diode ships on a reel for automated insertion — axial components on tape are fed through a radial-lead forming machine or a vibratory bowl feeder, not a standard SMD pick-and-place. Confirm the feeder compatibility before committing the line. ## Active lifecycle — sourcing posture Microchip Technology lists this part as Active.","metaTitle":"1N4737PE3/TR8 Zener Diode, 7.5 V, 1 W, DO-41","metaDescription":"Microchip Technology 1N4737PE3/TR8 Zener diode, 7.5 V nominal, ±10% tolerance, 1 W power dissipation. DO-204AL (DO-41) axial package.","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":"±10%","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":"1N4737","Impedance (Max) (Zzt)":"4 Ohms","Operating Temperature":"-65°C~150°C","Supplier Device Package":"DO-204AL (DO-41)","Voltage - Zener (Nom) (Vz)":"7.5 V","Current - Reverse Leakage @ Vr":"10 µA @ 5 V","Voltage - Forward (Vf) (Max) @ If":"1.2 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8850","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 1N4737PE3/TR8?","answer":"The Zener voltage tolerance is ±10%, and the maximum power dissipation is 1 W. The nominal Zener voltage is 7.5 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4737PE3-TR8","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4737PE3-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}}