{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE56C-E3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE56C-E3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE56C-E3-73","factsUrl":"https://icboms.com/api/mcp/products/1.5KE56C-E3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® TVS diode, 1.5KE56C-/73, bidirectional, 1500W peak pulse power, 45.4V reverse standoff, DO-201AA axial-lead package, Tape & Box.","salesMarkdown":"## TransZorb TVS — 1500 W bidirectional clamp for legacy bus protection The 1.5KE56C-E3/73: It clamps transients from a 45.4 V reverse standoff voltage to a maximum of 80.5 V at 18.6 A peak pulse current. The bidirectional configuration (single die, symmetrical breakdown) means a single device protects both polarities on a signal or power rail — useful on AC-coupled lines or floating buses where the transient polarity is unknown. Housed in the DO-201AA (DO-27) axial-lead package, it mounts through-hole and is suited for point-of-entry protection on 48 V telecom buses, 36 V nominal industrial supplies, or 28 V aircraft DC rails where the 45.4 V standoff provides margin above the steady-state rail. ## Clamping characteristics and temperature envelope Breakdown voltage is specified at 50.4 V minimum (the avalanche threshold), with the clamping ceiling at 80.5 V. The 18.6 A peak pulse current rating at the 10/1000 µs waveform defines the surge capability — a 1500 W device at this voltage class delivers roughly 18.6 A into the clamp before the junction exceeds its thermal limit. Operating junction temperature range is -55°C to +175°C, which covers military and industrial extremes. The wide Tj envelope means derating for ambient temperature is minimal at typical 85°C board temperatures, but above 125°C the peak pulse power must be linearly derated per the TransZorb application note. ## Obsolete — sourcing through independent channels The 1.5KE56C-/73 is marked Obsolete by Vishay. No official successor order code is recorded in the lifecycle entry. A functionally equivalent replacement would need to match the 45.4 V standoff, bidirectional polarity, 1500 W peak pulse rating, and DO-201AA footprint. Several manufacturers offer pin-compatible 1.5KE56CA-type devices in the same package — confirm the breakdown tolerance and clamping voltage against the original Vishay spec before committing a board spin.","metaTitle":"Vishay 1.5KE56C-E3/73 TransZorb TVS, 1500W, Bidirectional","metaDescription":"Vishay 1.5KE56C-E3/73 TransZorb TVS diode, 1500W peak pulse, 45.4V standoff, bidirectional, DO-201AA. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"TransZorb®","Package":"Tape & Box (TB)","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":"1.5KE56","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Voltage - Breakdown (Min)":"50.4V","Voltage - Clamping (Max) @ Ipp":"80.5V","Voltage - Reverse Standoff (Typ)":"45.4V","Current - Peak Pulse (10/1000µs)":"18.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE56C-E3-73","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE56C-E3-73 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}}