{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1CA-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE9.1CA-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE9.1CA-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1CA-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE9.1CA-B, bidirectional, 1500W peak pulse, 7.78V standoff, 13.4V clamp, DO-201AA/DO-27 axial, through-hole, bulk.","salesMarkdown":"## What the 1500W peak pulse rating means on the bench The 1.5KE9.1CA-B: That 1500W figure is the non-repetitive rating — it tells you the device can absorb a single surge of that energy without failing short, but it is not a continuous dissipation spec. On a repair bench, this is the part that clamps a 7.78V rail (reverse standoff) so the downstream ICs see no more than 13.4V during the event. The 113.4A peak pulse current at the clamping voltage means the diode shunts that much current into ground during a transient. If the board trace feeding it cannot handle that peak, the trace opens before the diode does — so the layout around the DO-201 leads matters as much as the part rating. ## Breakdown and clamping — the actual protection window Minimum breakdown voltage is 8.65V; the device starts conducting in avalanche at that point. The 7.78V standoff is the maximum DC voltage the diode will not clip — so a 5V or 3.3V rail is safe, but a 12V rail sits above standoff and the diode would conduct continuously and fail. Clamping at 13.4V means the protected circuit sees no more than that during the pulse. For a 12V nominal bus, that is tight enough to keep downstream FETs inside their Vds rating. The bidirectional channel handles positive and negative transients symmetrically, which is useful on AC-coupled signal lines or floating supplies. ## Package and temperature range — through-hole survivability DO-201AA / DO-27 axial leaded package, through-hole mount. The junction temperature range is -55°C to 175°C, so it handles the thermal spike from soldering and the self-heating during a pulse without derating at the board level. Bulk packaging means the parts ship loose in a bag or tube — no tape-and-reel for automated pick-and-place. Hand-insertion or wave-solder assembly only. ## Sourcing and lifecycle — active, no cross-reference on record No stock-holding claim — each RFQ is handled individually.","metaTitle":"1.5KE9.1CA-B Littelfuse TVS Diode, 1500W, Bidirectional","metaDescription":"Littelfuse 1.5KE9.1CA-B Zener TVS diode, 1500W peak pulse, 7.78V standoff, 13.4V clamp, DO-201. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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":"Active","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)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"113.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3162","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for 1.5KE9.1CA-B?","answer":"Submit an RFQ through this listing."},{"question":"What compliance documentation does Littelfuse Inc. provide for 1.5KE9.1CA-B?","answer":"The evidence does not list RoHS, REACH, UL, or IEC certification status for this specific order code. Standard Littelfuse TVS diodes in the 1.5KE series are typically RoHS compliant, but confirm with the manufacturer or your distributor at RFQ time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE9.1CA-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/1.5KE9.1CA-B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}