{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMB91CA","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMB91CA","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMB91CA","factsUrl":"https://icboms.com/api/mcp/products/1.5SMB91CA","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5SMB series TVS diode, bidirectional Zener, 1500W peak pulse power, 77.8V standoff, 125V clamp, DO-214AA SMB package, Tape & Reel.","salesMarkdown":"## What the 1500 W peak pulse rating means for a telecom line The 1.5SMB91CA: On a telecom line, the 77.8 V reverse standoff voltage means it sits transparently across a nominal 48 V bus or a 72 V ringing supply without conducting. When a lightning surge or power-cross transient arrives, it clamps at 125 V maximum, shunting 12.2 A of peak pulse current to ground. ## Bidirectional clamping — no polarity concern on the board With one bidirectional channel, the 1.5SMB91CA clamps transients of either polarity symmetrically. This eliminates the orientation check during pick-and-place that a unidirectional part requires. The breakdown voltage starts at 86.5 V minimum, so the part does not load the line during normal operation or during the positive and negative ringing cycles typical of telecom signalling. ## DO-214AA SMB — standard footprint, wide temperature grade The operating junction temperature range spans -65 °C to 150 °C, covering outdoor telecom cabinets, industrial enclosures, and under-hood automotive auxiliary circuits that see thermal cycling.","metaTitle":"Littelfuse 1.5SMB91CA TVS Diode, 1500W, 77.8V Standoff","metaDescription":"Bidirectional 1500W TVS for telecom lines. 77.8V standoff, 125V clamp at 12.2A. DO-214AA SMB. Active production. Order 1.5SMB91CA.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5SMB","Package":"Tape & Reel (TR)","Applications":"Telecom","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMB","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AA (SMBJ)","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2635","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/81b90dfb07fef606df152b0bf1427329.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy 1.5SMB91CA and how do I get a price?","answer":"The 1.5SMB91CA is available to order through independent distribution. Availability is verified at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMB91CA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMB91CA 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}}