{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE12C-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE12C-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE12C-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE12C-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series bidirectional TVS diode, 1.5KE12C-B, 1500W peak pulse power, 10.2V reverse standoff, DO-201AA axial, bulk.","salesMarkdown":"## What the 1500W peak pulse rating means on the bench The 1.5KE12C-B: That 1500W rating is the device's ability to absorb a transient without failing — it's not a continuous power dissipation figure. For a 10.2V reverse standoff voltage, the clamping voltage maxes out at 17.54V when the peak pulse current hits 91A, which is the current the part can shunt during that 10/1000µs event. The breakdown voltage range starts at 10.8V minimum, so the device begins conducting and clamping just above the 10.2V standoff level. This is a general-purpose transient suppressor — it has no power line protection rating, meaning it's intended for signal or low-energy DC rail clamping rather than mains AC protection. ## Package and board-fit: DO-201 axial lead Housed in a DO-201AA axial-lead package (also known as DO-27), the 1.5KE12C-B is a through-hole part with a single bidirectional die inside — one channel, two leads. The supplier device package is DO-201, and it's supplied in bulk, not tape-and-reel. On a repair bench, the axial form factor is easy to extract and replace with a soldering iron; the scorch mark on a dead board usually points right to it. The wide temp margin means the clamping voltage drift is predictable across the board's thermal profile. ## Lifecycle reality: obsolete, sourced through surplus Littelfuse lists the 1.5KE12C-B as Obsolete. No pin-compatible direct replacement is documented by Littelfuse, so a functional equivalent would need to match the 1500W peak pulse, 10.2V standoff, bidirectional configuration, and DO-201 footprint.","metaTitle":"Littelfuse 1.5KE12C-B TVS Diode, 1500W, 10.2V, DO-201","metaDescription":"Littelfuse 1.5KE12C-B bidirectional TVS diode, 1500W peak pulse power, 10.2V standoff, DO-201 axial. Obsolete — 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)":"10.8V","Voltage - Clamping (Max) @ Ipp":"17.54V","Voltage - Reverse Standoff (Typ)":"10.2V","Current - Peak Pulse (10/1000µs)":"91A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the 1.5KE12C-B?","answer":"No official pin-compatible successor is recorded by Littelfuse for the 1.5KE12C-B. Cross-referencing against other 1.5KE series parts with similar voltage ratings is the typical approach on the repair bench."},{"question":"What compliance documentation does Littelfuse provide for the 1.5KE12C-B?","answer":"For an obsolete part sourced through surplus channels, compliance documentation is typically lot-specific and should be requested at the time of RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE12C-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/1.5KE12C-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}}