{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE170A-T","brand":"Diodes Incorporated","brandSlug":"diodes-inc","productSlug":"1.5KE170A-T","canonicalUrl":"https://icboms.com/diodes-inc/1.5KE170A-T","factsUrl":"https://icboms.com/api/mcp/products/1.5KE170A-T","rawCanonicalId":null},"summary":{"shortDescription":"Diodes Incorporated 1.5KE170A-T Zener TVS diode, 1500W peak pulse power, 145V reverse standoff, 234V clamping, unidirectional, DO-201 axial, Tape & Reel.","salesMarkdown":"## What this 1500 W Zener TVS protects The 1.5KE170A-T: It clamps a 145 V reverse standoff voltage to 234 V max at a peak pulse current of 6.4 A, which means a 48 V or 72 V bus that sees a 1.5 kW surge gets held below the downstream component's abs-max rating. The part is obsolete per the manufacturer, so new-design sourcing goes through independent distribution channels. For a repair or a BOM fill on an existing board, the DO-201 axial package (also known as DO-27) is a through-hole footprint that hand-solders easily — no hot-air profile needed. ## Voltage ratings and the clamping decision The reverse standoff voltage (working voltage) is 145 V — the TVS draws negligible leakage below this level. Breakdown occurs at 162 V min, and clamping is 234 V max at the full 6.4 A peak pulse current. The gap between standoff and clamp (roughly 89 V) is the voltage the TVS absorbs across its dynamic resistance during the surge event. The 1500 W rating is derated above 25°C per the standard power-temperature curve for a DO-201 package — at 175°C the peak pulse power drops to near zero, so the thermal margin at the operating ambient must be checked against the surge duty cycle. ## Sourcing an obsolete TVS diode Diodes Incorporated lists the 1.5KE170A-T as obsolete. For a BOM that needs this exact clamping voltage and package, the through-hole DO-201 footprint is shared across the entire 1.5KE series — a parametric search for 1500 W, 145 V standoff, unipolar, DO-201 will turn up active alternatives from multiple suppliers, though pinout and electrical limits should be cross-checked against the original design's surge requirements.","metaTitle":"1.5KE170A-T Diodes Inc Zener TVS, 1500W, DO-201","metaDescription":"Diodes Incorporated 1.5KE170A-T Zener TVS diode, 1500W peak pulse power, 145V standoff, DO-201 axial. Obsolete, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Diodes Incorporated","Type":"Zener","Series":"-","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE170","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"162V","Voltage - Clamping (Max) @ Ipp":"234V","Voltage - Reverse Standoff (Typ)":"145V","Current - Peak Pulse (10/1000µs)":"6.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b6b9d4121cb66208511919f4a66769e1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy 1.5KE170A-T?","answer":"The 1.5KE170A-T is obsolete from Diodes Incorporated. Quantities and lead time are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diodes-inc/1.5KE170A-T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diodes-inc/1.5KE170A-T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-19T21:33:34.227Z","lastPublished":"2026-07-19T21:33:34.227Z","indexable":true}}