{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE33C","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE33C","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE33C","factsUrl":"https://icboms.com/api/mcp/products/1.5KE33C","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5KE series TVS diode, 1.5KE33C, Zener type, 1500W peak pulse power, 28.2V reverse standoff, 33.3A peak current, bidirectional, DO-201AA axial through-hole, Tape & Reel.","salesMarkdown":"## Protection profile — what the ratings mean for the circuit The 1.5KE33C: The 28.2V reverse standoff voltage (working voltage) means the part does not conduct at normal rail levels up to that point. Clamping triggers at 29.75V minimum breakdown and holds the transient to 47.99V maximum at 33.3A peak pulse current — enough to protect a 24V DC bus or a 28V nominal line from surges without letting the spike exceed the downstream device's abs-max rating. The single bidirectional channel handles positive and negative transients in one package, simplifying layout for AC-coupled or floating lines. No power line protection feature (no internal filter), so this is a pure clamp — use it across the signal or supply pair, not as a standalone EMI suppressor. ## Package and temperature grade — board-fit considerations Supplied in a DO-201AA (DO-27) axial leaded package, through-hole mount. The DO-201 body handles the 1500W pulse without cracking the encapsulant, but the axial leads need through-hole plated holes on the PCB — not a surface-mount part. The wide range means derating for ambient temperature is minimal in most enclosures, but above 175°C the junction limit governs. ## Sourcing the 1.5KE33C in an obsolete lifecycle Given the Obsolete status, new-stock procurement is through surplus and broker channels. The 1.5KE series has many voltage variants, but a pin-compatible alternative from the same family would require the same 33V bidirectional rating. Request a quote for current availability and date code options.","metaTitle":"Littelfuse 1.5KE33C TVS Diode, 1500W, Bidirectional, DO-201","metaDescription":"Littelfuse 1.5KE33C obsolete TVS diode, 1500W peak pulse, 28.2V standoff, bidirectional, DO-201.","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":"Tape & Reel (TR)","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)":"29.75V","Voltage - Clamping (Max) @ Ipp":"47.99V","Voltage - Reverse Standoff (Typ)":"28.2V","Current - Peak Pulse (10/1000µs)":"33.3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7081","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the 1.5KE33C or check stock?","answer":"Submit an RFQ to confirm current availability, lot quantities, and pricing — each lot is confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE33C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE33C 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}}