{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N5255B-TAP","brand":"Vishay","brandSlug":"vishay","productSlug":"1N5255B-TAP","canonicalUrl":"https://icboms.com/vishay/1N5255B-TAP","factsUrl":"https://icboms.com/api/mcp/products/1N5255B-TAP","rawCanonicalId":null},"summary":{"shortDescription":"1N5255B-TAP, Vishay, Zener Diode, 28 V, 500 mW, ±5%, DO-35 Axial, -65°C to 175°C, AEC-Q101","salesMarkdown":"## 28 V zener for automotive and industrial clamping The 1N5255B-TAP is a 28 V zener diode rated for 500 mW continuous power dissipation, housed in a DO-35 (DO-204AH) axial-lead package. Its ±5% tolerance on the nominal voltage makes it a direct fit for voltage-reference and transient-clamping circuits where the regulation band is not critical. AEC-Q101 qualification and an operating junction range of -65°C to 175°C mean this part is screened for automotive under-hood and powertrain environments, as well as industrial gear where the ambient temperature can swing past 125°C. The 44 Ω maximum dynamic impedance (Zzt) is typical for a 28 V device at this power level — the regulation slope is modest but predictable over the operating current range. ## Leakage and forward characteristics Reverse leakage is specified at 100 nA maximum at 21 V — a guard-banded condition that confirms the diode holds off well below the 28 V knee. Forward voltage is 1.1 V maximum at 200 mA, a standard figure for a silicon zener of this die size. ## Active production, automotive-grade traceability The Tape & Box (TB) and Cut Tape (CT) packaging options cover both volume production and prototype reels.","metaTitle":"1N5255B-TAP Zener Diode 28V 500mW AEC-Q101 DO-35","metaDescription":"1N5255B-TAP zener diode, 28V nominal, 500mW, ±5% tolerance, AEC-Q101 qualified, DO-35 axial package. Active production.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q101","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Series":"Automotive, AEC-Q101","Package":"Tape & Box (TB); Cut Tape (CT)","Tolerance":"±5%","Power - Max":"500 mW","Mounting Type":"Through Hole","Package / Case":"DO-204AH, DO-35, Axial","lifecycle_stage":"eol_hot","Impedance (Max) (Zzt)":"44 Ohms","Operating Temperature":"-65°C ~ 175°C","Supplier Device Package":"DO-35 (DO-204AH)","Voltage - Zener (Nom) (Vz)":"28 V","Current - Reverse Leakage @ Vr":"100 nA @ 21 V","Voltage - Forward (Vf) (Max) @ If":"1.1 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.18","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.18000","currency":"USD"},{"qty":10,"price":"$0.16700","currency":"USD"},{"qty":100,"price":"$0.09090","currency":"USD"},{"qty":500,"price":"$0.05596","currency":"USD"},{"qty":1000,"price":"$0.03816","currency":"USD"},{"qty":2000,"price":"$0.03244","currency":"USD"},{"qty":5000,"price":"$0.02926","currency":"USD"},{"qty":10000,"price":"$0.02544","currency":"USD"},{"qty":30000,"price":"$0.02290","currency":"USD"},{"qty":50000,"price":"$0.02035","currency":"USD"},{"qty":100000,"price":"$0.01980","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/44b48d0a9b244fe1da43b35a93d76a5b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is 1N5255B-TAP automotive qualified?","answer":"Yes."},{"question":"What package does 1N5255B-TAP come in?","answer":"The diode is supplied in a DO-204AH (DO-35) axial-lead package. The mounting type is through-hole."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/1N5255B-TAP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/1N5255B-TAP when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}