{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4742P/TR8","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4742P-TR8","canonicalUrl":"https://icboms.com/microchip/1N4742P-TR8","factsUrl":"https://icboms.com/api/mcp/products/1N4742P%2FTR8","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4742P/TR8 Zener diode, 12 V nominal, ±10% tolerance, 1 W power dissipation, DO-204AL (DO-41) axial package, Tape & Reel.","salesMarkdown":"## 12 V regulation point, 1 W dissipation budget The 1N4742P/TR8 is a 12 V Zener diode in the standard DO-204AL (DO-41) axial-lead package, rated for 1 W continuous power dissipation. The 12 V nominal voltage defines the regulation point for shunt-clamp or reference applications; the 1 W power ceiling sets the thermal budget — at 12 V the diode can sink roughly 83 mA continuous before junction temperature drives derating. Tolerance is ±10%, so the actual Zener voltage for any given unit falls between 10.8 V and 13.2 V. For a precision reference rail this band may be too wide; for transient clamping or crude regulation it is adequate. The 9 Ω maximum impedance at the Zener test current means the regulation voltage shifts about 90 mV per 10 mA of load change — a figure to budget into the output tolerance stack-up. The full military temperature span of -65°C to 150°C qualifies this diode for engine-bay electronics, downhole instrumentation, or outdoor telecom enclosures where the ambient swings past the commercial range. Reverse leakage is specified at 5 µA maximum at 9.1 V reverse voltage. This confirms the Zener knee is sharp enough that the diode draws negligible current below the breakdown region — important for battery-powered circuits where every microamp of standby current matters. Forward voltage is 1.2 V maximum at 200 mA, consistent with a standard silicon junction. The base product number is 1N4742; the /TR8 suffix indicates Tape & Reel packaging for automated insertion equipment. Through-hole DO-41 diodes in reel format are less common than bulk or ammo-pack, so confirm the feeder compatibility before committing to the reel quantity.","metaTitle":"1N4742P/TR8 Zener Diode, 12 V, 1 W, DO-41, Microchip","metaDescription":"Microchip Technology 1N4742P/TR8 Zener diode, 12 V nominal, 1 W power dissipation, DO-204AL (DO-41) axial package. Active production, available 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":"±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":"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":"$1.7850","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 1N4742P/TR8?","answer":"The 1N4742P/TR8 is a standard 12 V, 1 W Zener in the DO-41 package. Any 12 V, 1 W Zener diode in the same DO-204AL (DO-41) axial package from another manufacturer is a functional equivalent — the JEDEC-registered 1N4742A (5% tolerance) or 1N4742 (10% tolerance) are the generic cross-references. No proprietary Microchip-only pinout exists for this device class."},{"question":"What compliance documentation does Microchip Technology provide for 1N4742P/TR8?","answer":"Microchip Technology provides RoHS and REACH compliance declarations for this part number. The DO-41 package is lead-free and halogen-free per Microchip's standard material declaration. No UL or IEC certification is typically issued for individual Zener diodes — the compliance documentation covers the manufacturing process and material composition, not device-level safety certification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4742P-TR8","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4742P-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}}