{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE400C-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE400C-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE400C-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE400C-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5KE series, Type Zener, Bidirectional TVS Diode, 1.5KE400C-B, 1500W Peak Pulse Power, 342V Reverse Standoff, DO-201AA / DO-27 Axial, Bulk.","salesMarkdown":"## 1500 W bidirectional Zener TVS — 342 V standoff, DO-201 axial The 1.5KE400C-B: A single bidirectional channel means this part replaces two unidirectional TVS diodes wired back-to-back, saving board space and reducing part count on bipolar lines such as RS-485, CAN bus, or ±24 V sensor supplies. ## Clamping window and pulse current — what the ratings mean for the protection design With a 342 V reverse standoff voltage, the diode does not conduct at the nominal rail voltage up to that level; leakage remains negligible until the transient exceeds the 360 V minimum breakdown, at which point the device avalanches and clamps the surge to a maximum 575.4 V. ## Through-hole DO-201 package — board-fit and surge handling No power line protection — the 1.5KE400C-B is not rated for continuous AC mains overvoltage clamping; it is intended for transient suppression on DC buses and signal lines where the steady-state voltage stays below 342 V. ## Obsolete — sourcing through independent distribution Littelfuse lists the 1.5KE400C-B as obsolete. Availability and pricing are confirmed at RFQ.","metaTitle":"Littelfuse 1.5KE400C-B Zener TVS, 1500W, DO-201","metaDescription":"Littelfuse 1.5KE400C-B bidirectional Zener TVS diode, 1500W peak pulse power, 342V standoff, DO-201 axial.","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)":"360V","Voltage - Clamping (Max) @ Ipp":"575.4V","Voltage - Reverse Standoff (Typ)":"342V","Current - Peak Pulse (10/1000µs)":"2.8A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the peak pulse power rating of the 1.5KE400C-B?","answer":"1500 W (1.5 kW) measured with the 10/1000 µs waveform. The clamping voltage at that pulse is 575.4 V maximum, limiting the peak pulse current to 2.8 A."},{"question":"What package does the 1.5KE400C-B use?","answer":"DO-201AA / DO-27 axial leaded through-hole. The supplier device package is DO-201."},{"question":"How can I source the 1.5KE400C-B for a legacy BOM?","answer":"The part is obsolete and available through independent distribution. Submit an RFQ with your target quantity; each lot is inspected and electrically verified against the original 1.5KE400C-B specifications before shipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE400C-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/1.5KE400C-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}}