{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE120C-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE120C-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE120C-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE120C-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5KE series, TVS Zener, Bidirectional, 1.5KE120C-B, DO-201AA DO-27 Axial, 1500W, 102V Standoff, 173.25V Clamping, Bulk.","salesMarkdown":"## Obsolete but still spec'd — the 1.5KE120C-B sourcing reality It clamps at 173.25 V max with a 9.2 A peak pulse current capacity, and the reverse standoff voltage is 102 V. ## What the ratings mean for the protection circuit The 173.25 V clamping voltage at 9.2 A is the worst-case voltage the protected load sees during a surge; if your downstream components have a higher absolute maximum rating, the TVS absorbs the energy before they do. The DO-201AA / DO-27 axial-lead package is through-hole — it stands off the board and dissipates heat through the leads into the PCB copper. ## Sourcing an obsolete TVS — what to expect Because Littelfuse has discontinued the 1.5KE120C-B, new inventory comes from independent surplus or broker channels. Each lot is verified for authenticity and tested to the original datasheet limits before it ships. No official pin-compatible successor is listed by Littelfuse; the closest functional match would be another 1500 W bidirectional TVS in a DO-201 package with a 102 V standoff, but the clamping voltage and pulse current must be cross-checked against the original spec.","metaTitle":"Littelfuse 1.5KE120C-B TVS Diode, 102V Standoff, DO-201","metaDescription":"Obsolete Littelfuse 1.5KE120C-B bidirectional TVS, 1500W peak pulse, 102V standoff, DO-201. Sourced to order against RFQ through independent distribution.","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)":"108V","Voltage - Clamping (Max) @ Ipp":"173.25V","Voltage - Reverse Standoff (Typ)":"102V","Current - Peak Pulse (10/1000µs)":"9.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE120C-B?","answer":"We source the 1.5KE120C-B through independent distribution channels. Submit an RFQ for a firm offer."},{"question":"What is the closest alternative to the 1.5KE120C-B?","answer":"Littelfuse does not publish an official successor for this part. A functionally equivalent bidirectional TVS would need to match the 1500 W peak pulse power, 102 V standoff, and DO-201 package. The clamping voltage and peak pulse current of any substitute must be verified against the original 173.25 V / 9.2 A ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE120C-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/1.5KE120C-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}}