{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE27C-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE27C-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE27C-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE27C-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series, Bidirectional Zener TVS Diode, 1.5KE27C-B, 1500W Peak Pulse Power, 23.1V Reverse Standoff, DO-201AA Axial, Bulk.","salesMarkdown":"## Voltage selection and clamping behaviour The 1.5KE27C-B: The 23.1 V reverse standoff voltage (working voltage) means this part protects a 24 V bus or a 24 Vdc supply rail — the TVS remains transparent below that level and only conducts when the transient exceeds the breakdown threshold of 24.35 V min. Maximum clamping at 39.38 V keeps the protected circuit's downstream components within a safe voltage ceiling; a 40.5 A peak pulse current at that clamp voltage confirms the 1500 W rating holds across the full pulse envelope. ## Temperature range and deployment context The DO-201 package body and axial leads handle the thermal cycling of soldered through-hole joints better than a small SMD package in high-vibration environments — a consideration for power supplies, base stations, and heavy equipment control boards. Littelfuse lists the 1.5KE27C-B as obsolete. A design-in replacement would require a board spin — the DO-201 footprint is not shared by surface-mount TVS diodes in the same voltage class.","metaTitle":"Littelfuse 1.5KE27C-B TVS Diode, 1500W, DO-201","metaDescription":"Obsolete Littelfuse 1.5KE27C-B bidirectional Zener TVS diode, 1500W peak pulse power, 23.1V standoff, DO-201 axial. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5KE","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Voltage - Breakdown (Min)":"24.35V","Voltage - Clamping (Max) @ Ipp":"39.38V","Voltage - Reverse Standoff (Typ)":"23.1V","Current - Peak Pulse (10/1000µs)":"40.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I get pricing and availability for the 1.5KE27C-B?","answer":"Submit an RFQ against your BOM quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE27C-B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE27C-B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}