{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE56AG","brand":"onsemi","brandSlug":"onsemi","productSlug":"1.5KE56AG","canonicalUrl":"https://icboms.com/onsemi/1.5KE56AG","factsUrl":"https://icboms.com/api/mcp/products/1.5KE56AG","rawCanonicalId":null},"summary":{"shortDescription":"onsemi Mosorb™ series, Zener TVS diode, 1.5KE56AG, 1500W peak pulse power, 47.8V reverse standoff, 77V clamping at 19.5A, DO-201AD axial package.","salesMarkdown":"The 1.5KE56AG is a unidirectional Zener TVS diode from the onsemi Mosorb™ family, rated for 1500W peak pulse power (10/1000µs waveform). It clamps a 47.8V reverse standoff rail to 77V maximum at 19.5A peak pulse current, making it a fit for protecting 48V nominal or 56V-max DC buses in industrial power supplies, telecom rectifiers, and automotive auxiliary circuits that can tolerate a through-hole axial package. ## Clamping voltage and breakdown margin for a 56V rail Minimum breakdown voltage is 53.2V; the device will start conducting around that threshold. On a 56V bus the TVS sits below the rail during normal operation (standoff 47.8V) but must not trigger on transient ripple. The 77V clamp at 19.5A is the voltage the protected circuitry must survive — if the downstream device's absolute maximum is below 77V, this part will not protect it. onsemi lists the 1.5KE56AG as Obsolete. For a new design, select a current-production equivalent from the same Mosorb™ family with matching breakdown voltage and package. For an existing BOM, confirm the remaining quantity against your build forecast and source through verified distribution channels; the date-code and marking consistency should be checked on any broker-supplied material. Junction temperature range is -65°C to 175°C, which covers military and high-reliability industrial environments. The DO-201AD axial package is a through-hole leaded format — it requires a drilled PCB and hand-solder or wave-solder assembly, not reflow. The copper lead diameter and body size are larger than SMD TVS packages; board layout must accommodate the hole pattern and lead spacing.","metaTitle":"1.5KE56AG onsemi Mosorb™ Zener TVS – 1500W, DO-201AD","metaDescription":"onsemi 1.5KE56AG Zener TVS diode, 1500W peak pulse power, 77V clamping at 19.5A, DO-201AD axial. Obsolete – verify stock and lead time via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"Mosorb™","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AD, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-65°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"Axial","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"53.2V","Voltage - Clamping (Max) @ Ipp":"77V","Voltage - Reverse Standoff (Typ)":"47.8V","Current - Peak Pulse (10/1000µs)":"19.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/717ad1fc0ab391931f54c66e75e89e87.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE56AG/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for the 1.5KE56AG?","answer":"onsemi does not publish a direct successor for the 1.5KE56AG. For a new design, select a current-production TVS from the same Mosorb™ family with a 47.8V reverse standoff voltage and DO-201AD package. Confirm the breakdown voltage and clamping voltage match your rail requirements."},{"question":"What does the 'G' suffix mean in 1.5KE56AG?","answer":"The 'G' suffix on onsemi TVS diodes typically indicates a lead-free / RoHS-compliant finish. The base part 1.5KE56A without the 'G' may have a tin-lead plating."},{"question":"Can I use the 1.5KE56AG in a 56V circuit?","answer":"The reverse standoff voltage is 47.8V, meaning the TVS will not conduct at normal 56V DC — it will be forward-biased and may conduct or break down. For a 56V rail, select a TVS with a standoff voltage above 56V, typically the next higher voltage grade in the 1.5KE series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/1.5KE56AG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/1.5KE56AG when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:12:58.508Z","lastPublished":"2026-07-17T20:12:58.508Z","indexable":true}}