{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4742CPE3/TR8","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4742CPE3-TR8","canonicalUrl":"https://icboms.com/microchip/1N4742CPE3-TR8","factsUrl":"https://icboms.com/api/mcp/products/1N4742CPE3%2FTR8","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4742CPE3/TR8 Zener Diode, 12 V Nominal, ±2% Tolerance, 1 W Power, DO-204AL (DO-41) Axial, Tape & Reel.","salesMarkdown":"## 12 V ±2% regulation with 1 W dissipation ceiling The 1N4742CPE3/TR8 is a 12 V zener diode in the 1N4742 family from Microchip Technology, rated for 1 W continuous power dissipation in the DO-204AL (DO-41) axial-lead package. The ±2% tolerance on the nominal 12 V zener voltage means the regulation window is 11.76 V to 12.24 V at the test current — tighter than the standard ±5% grade, which matters when the clamped rail feeds a precision reference or an ADC supply. ## Operating envelope and dynamic impedance Maximum zener impedance is 9 Ohms (Zzt at the test current), so the voltage shift under load is bounded — a 10 mA change in zener current shifts the output by less than 90 mV, keeping the rail inside the ±2% tolerance band. Reverse leakage is 5 µA maximum at 9.1 V, which is the knee voltage — below the zener region the diode draws negligible current, so standby power in a shunt regulator or overvoltage clamp stays under 50 µW. Housed in the DO-204AL (DO-41) axial-lead package, the diode is through-hole mounted — the 0.025-inch diameter leads suit standard 0.040-inch plated-through holes on a 0.100-inch grid. Supplied in Tape & Reel (TR) format, the part is ready for automated insertion or hand assembly from cut tape.","metaTitle":"Microchip 1N4742CPE3/TR8 Zener Diode, 12 V, 1 W, DO-41","metaDescription":"Active production 12 V zener diode, ±2% tolerance, 1 W dissipation, DO-204AL (DO-41) axial package. -65°C to 150°C range. 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":"±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":"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":"$1.1100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f2579cdb7aec091d0b5f99df5459e04c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does the 1N4742CPE3/TR8 come in?","answer":"It is supplied in the DO-204AL (DO-41) axial-lead through-hole package, on Tape & Reel."},{"question":"What is the maximum power dissipation of this zener diode?","answer":"The device is rated for 1 W continuous power dissipation at the case temperature."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4742CPE3-TR8","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4742CPE3-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}}