{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE27-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE27-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE27-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE27-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE27-B, 1500W peak pulse power, 23.1V standoff, 39.38V clamping, DO-201AA/DO-27 axial, through-hole, bulk.","salesMarkdown":"## 1500 W transient suppressor — obsolete, but still specifiable The 1.5KE27-B: Its 23.1 V reverse standoff voltage and 39.38 V clamping point at 40.5 A peak pulse current make it a fit for 24 V DC rail protection where the transient energy stays within the 1.5 kJ rating. ## Clamping voltage and pulse current — the numbers that decide fit Breakdown occurs at a minimum of 24.35 V, clamping the line to 39.38 V maximum at the rated 40.5 A peak pulse current. The 23.1 V standoff voltage sits comfortably below a nominal 24 V bus, so the diode stays transparent during normal operation and only conducts when the transient exceeds the breakdown threshold. No power line protection built in — this is a secondary-side transient clamp, not a primary mains suppressor. ## Obsolete part — sourcing through independent channels Littelfuse has listed the 1.5KE27-B as obsolete. For existing BOM lines, availability is confirmed through independent surplus and distributor inventory — each lot is date-code verified before offer.","metaTitle":"Littelfuse 1.5KE27-B TVS Diode, 1500W, DO-201, Obsolete","metaDescription":"Littelfuse 1.5KE27-B Zener TVS diode, 1500W peak pulse power, 23.1V standoff, DO-201 axial. Obsolete — sourced to order against RFQ. Request quote.","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","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","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":"$0.6700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE27-B and get a price?","answer":"Submit an RFQ for current availability and pricing — no stock or price figures are held on this page."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE27-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/1.5KE27-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}}