{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE150C-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE150C-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE150C-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE150C-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series bidirectional TVS diode, 1.5KE150C-B, 1500W peak pulse power, 128V reverse standoff, DO-201AA axial, bulk.","salesMarkdown":"## Bidirectional Zener clamp, 1500 W peak pulse The 1.5KE150C-B: The bidirectional configuration means a single device protects both polarities — useful on AC signal lines or DC rails where the polarity could reverse during a fault. It is not a power-line protector (the spec explicitly flags no power line protection), so keep it on signal or low-power DC bus applications. ## DO-201 axial, through-hole, -55 to 175 °C Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE150C-B is a through-hole part — the leads are formed for through-hole insertion, not surface mount. The operating junction temperature range spans -55 °C to 175 °C, covering industrial and most automotive under-hood ambient conditions without derating at the high end. The DO-201 body is large enough to read the marking without magnification — helpful for field-service verification when you are swapping it on a board without a schematic in hand. Polarity is obvious on a bidirectional part: no band to misinterpret. ## Obsolete — sourced through independent channels Littelfuse lists the 1.5KE150C-B as obsolete. There is no pin-compatible direct replacement from Littelfuse in the same 1.5KE series with identical breakdown and standoff ratings. If you need a drop-in alternative, the closest functional match is another 1500 W bidirectional TVS in DO-201 with a 128 V standoff — but confirm the breakdown window and clamping voltage against your circuit's protection threshold.","metaTitle":"Littelfuse 1.5KE150C-B TVS Diode, 1500W Bidirectional","metaDescription":"Obsolete Littelfuse 1.5KE150C-B bidirectional TVS diode, 1500W peak pulse, 128V 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)":"135.45V","Voltage - Clamping (Max) @ Ipp":"217.35V","Voltage - Reverse Standoff (Typ)":"128V","Current - Peak Pulse (10/1000µs)":"7.3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the 1.5KE150C-B?","answer":"There is no official pin-compatible replacement from Littelfuse. A functional equivalent would be another 1500 W bidirectional TVS in a DO-201 axial package with a 128 V reverse standoff and a breakdown voltage starting at 135 V. Verify the clamping voltage (217 V max for this part) matches your circuit's protection requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE150C-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/1.5KE150C-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}}