{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4737CP/TR12","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4737CP-TR12","canonicalUrl":"https://icboms.com/microchip/1N4737CP-TR12","factsUrl":"https://icboms.com/api/mcp/products/1N4737CP%2FTR12","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4737CP/TR12 Zener diode, 7.5 V nominal, ±2% tolerance, 1 W maximum power, DO-204AL (DO-41) axial package, Tape & Reel.","salesMarkdown":"## 7.5 V regulation with ±2% guard band The 1N4737CP/TR12 is a 7.5 V Zener diode rated for 1 W continuous dissipation in the DO-41 axial package. The ±2% tolerance on Vz means the regulation window is 7.35 V to 7.65 V — tighter than the standard ±5% Zener, so a rail that needs 7.5 V ± 0.15 V stays in spec without a secondary trim. ## Impedance and leakage — the load-line limits Maximum Zener impedance is 4 Ohms at the test current — this sets the voltage drop for a given load current swing. A 5 mA change in load shifts the regulated voltage by 20 mV, within the ±2% band. Reverse leakage at 5 V is 10 µA max, negligible for most bias circuits but worth derating if the Zener sits across a high-impedance node at elevated temperature. Forward voltage is 1.2 V max at 200 mA — this is the conduction drop if the diode is forward-biased (e.g., in a reverse-polarity protection string). ## 1 W at 150°C — thermal budget Rated for 1 W continuous power at 25°C ambient, derating to zero at 150°C junction. In a 70°C ambient with no forced air, the DO-41 body dissipates roughly 800 mW before the junction exceeds 125°C — the 7.5 V Zener at 100 mA draws 750 mW, leaving margin for a 50°C ambient rise. For higher currents, a heatsink clip on the DO-41 body or a Kelvin-connected cathode lead reduces the junction-to-ambient thermal resistance. ## DO-41 axial — through-hole for manual or wave-solder The DO-204AL (DO-41) axial-lead package is through-hole, compatible with hand-insertion, wave-solder, and tape-and-reel auto-insertion. The TR suffix indicates Tape & Reel packaging — 52 mm tape width, 5,000 pieces per reel, suitable for pick-and-place with axial feeders.","metaTitle":"Microchip 1N4737CP/TR12 Zener Diode, 7.5 V, 1 W","metaDescription":"Microchip 1N4737CP/TR12 Zener diode, 7.5 V ±2%, 1 W, DO-41 axial. 4 Ohm impedance, 10 µA leakage at 5 V. Active lifecycle — sourced per RFQ.","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":"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":"$2.1900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f2579cdb7aec091d0b5f99df5459e04c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1N4737CP/TR12 in the Discrete Semiconductors family?","answer":"The 1N4737A and 1N4737B are industry-standard ±5% and ±10% tolerance versions of the 7.5 V Zener, same DO-41 package and 1 W rating. The CP suffix in the Microchip part denotes ±2% tolerance, so the A or B variants are drop-in replacements where the tighter regulation window is not required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4737CP-TR12","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4737CP-TR12 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}}