{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4742UR-1/TR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4742UR-1-TR","canonicalUrl":"https://icboms.com/microchip/1N4742UR-1-TR","factsUrl":"https://icboms.com/api/mcp/products/1N4742UR-1%2FTR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4742UR-1/TR Zener diode, 12 V nominal, 1 W, ±10% tolerance, DO-213AB MELF (Glass) package, Surface Mount.","salesMarkdown":"## 12 V regulation with a 1 W thermal budget The 1N4742UR-1/TR is a 12 V Zener diode in the Microchip Technology portfolio, rated for 1 W continuous power dissipation in a DO-213AB MELF glass package. The 9 Ohm maximum impedance (Zzt) at the test current keeps the regulation slope shallow; as the bias current varies, the output voltage shifts less than it would with a higher-impedance part. Reverse leakage is specified at 5 µA maximum when the applied voltage is 9.1 V — well below the Zener knee, so this is the standby current in a shunt regulator or protection clamp. The glass MELF body (DO-213AB) is hermetic — no moisture ingress, no plastic package cracking during reflow. Surface-mount assembly uses standard pick-and-place; the cylindrical body rolls during placement if the nozzle vacuum is too low, so a flat-tip or cavity nozzle is recommended. ## Active lifecycle and sourcing No pin-compatible alternative is recorded on this line; the DO-213AB footprint is specific to this hermetic MELF series.","metaTitle":"1N4742UR-1/TR Zener Diode, 12 V, 1 W, DO-213AB MELF","metaDescription":"Microchip Technology 1N4742UR-1/TR Zener diode, 12 V nom, 1 W, ±10% tolerance, DO-213AB MELF, 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":"-","Packaging":"Tape & Reel (TR) Cut Tape (CT)","Tolerance":"±10%","Part Status":"Active","Power - Max":"1 W","Mounting Type":"Surface Mount","Package / Case":"DO-213AB, MELF (Glass)","lifecycle_stage":"eol_hot","Impedance (Max) (Zzt)":"9 Ohms","Operating Temperature":"-65°C ~ 175°C","Supplier Device Package":"DO-213AB (MELF, LL41)","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":"$3.3700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a0251be6a72aede31ddcae209e0fcbbb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the tolerance and power rating of this Zener diode?","answer":"The 1N4742UR-1/TR has a ±10% tolerance on the 12 V nominal Zener voltage and a maximum power dissipation of 1 W. The maximum Zener impedance is 9 Ohms."},{"question":"Where can I buy the 1N4742UR-1/TR and get a quote?","answer":"This part is sourced through independent distribution channels. Submit an RFQ for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4742UR-1-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4742UR-1-TR 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}}