{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4742AP/TR12","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4742AP-TR12","canonicalUrl":"https://icboms.com/microchip/1N4742AP-TR12","factsUrl":"https://icboms.com/api/mcp/products/1N4742AP%2FTR12","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4742AP/TR12 Zener diode, 12 V nominal, 1 W, ±5% tolerance, DO-204AL (DO-41) axial-lead, Tape & Reel.","salesMarkdown":"## 12 V regulation at 1 W — the BOM-fit anchor The 1N4742AP/TR12 is a 12 V Zener diode rated for 1 W continuous power dissipation in the DO-204AL (DO-41) axial-lead package — the voltage and power ratings define the shunt regulation or clamping point in the circuit. With ±5% tolerance on the 12 V nominal, the actual Zener voltage falls between 11.4 V and 12.6 V — tight enough for most reference and protection roles without a precision-grade premium. ## Parametric limits for the application Maximum Zener impedance is 9 Ohms (Zzt at the test current) — lower impedance means tighter voltage regulation as the bias current varies, which matters when the diode doubles as a reference for a downstream regulator. Reverse leakage is 5 µA max at 9.1 V reverse voltage — at the knee, the diode draws negligible current before breakdown, so it does not load the supply in standby or unregulated conditions. Forward voltage is 1.2 V max at 200 mA — if the diode sees forward current in a transient or reverse-polarity event, the 1.2 V drop at 200 mA is well within the 1 W dissipation budget for short-duration events. The Tape & Reel suffix (/TR12) means it ships on a 12 mm tape for axial-lead components — the reel quantity is standard for the DO-41 format and matches automated insertion lines.","metaTitle":"Microchip 1N4742AP/TR12 Zener Diode, 12 V, 1 W, DO-41","metaDescription":"Microchip 1N4742AP/TR12 Zener diode, 12 V nominal, 1 W, ±5% tolerance, DO-204AL (DO-41) axial-lead package. Active production, sourced and quoted to order.","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":"±5%","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":"1N4742","Impedance (Max) (Zzt)":"9 Ohms","Operating Temperature":"-65°C~150°C","Supplier Device Package":"DO-204AL (DO-41)","Voltage - Zener (Nom) (Vz)":"12 V","Current - Reverse Leakage @ Vr":"5 µA @ 9.1 V","Voltage - Forward (Vf) (Max) @ If":"1.2 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.8150","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 1N4742AP/TR12 in this Discrete Semiconductors family?","answer":"The base product number 1N4742 covers the same 12 V, 1 W die; the /TR12 suffix indicates Tape & Reel packaging only. Any replacement would need the same DO-204AL (DO-41) footprint and 12 V, 1 W rating to drop in without a board change."},{"question":"What compliance documentation does Microchip Technology provide for 1N4742AP/TR12?","answer":"The part is RoHS-compliant per Microchip's standard material declaration. No UL, IEC, or REACH-specific certification is listed in the product record; typical Microchip Zener diodes carry RoHS and conflict-minerals reporting. Request the full compliance certificate at RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4742AP-TR12","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4742AP-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}}