{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE56A-E3/51","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE56A-E3-51","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE56A-E3-51","factsUrl":"https://icboms.com/api/mcp/products/1.5KE56A-E3%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® Zener TVS, 1.5KE56A-/51, 1500W peak pulse, 47.8V reverse standoff, DO-201AA axial, through hole, bulk.","salesMarkdown":"## What this 1500 W Zener TVS actually protects The 1.5KE56A-E3/51: It clamps a transient at 77 V maximum when the surge current hits 19.5 A, and its 47.8 V reverse standoff means the protected rail can sit at that voltage without the diode conducting in standby. The DO-201AA axial package (also known as DO-27) is through-hole mounted — it handles the thermal pulse of a 1.5 kW surge without lifting a pad, but the leads need to be bent and inserted into a board or terminal block, not reflowed. ## Obsolete — sourcing through independent channels Vishay lists this part as Obsolete. The 1500 W peak pulse rating (10/1000 µs) is the energy the diode can absorb in a single surge — it does not mean continuous 1500 W. For a 24 VDC supply rail, the 47.8 V standoff gives headroom above nominal, and the 53.2 V minimum breakdown ensures the TVS does not clamp during normal ripple. If the downstream components have a 80 V absolute maximum, this TVS keeps them inside the safe operating area.","metaTitle":"1.5KE56A-E3/51 TransZorb TVS, 1500W, 47.8V Standoff","metaDescription":"Vishay 1.5KE56A-E3/51 TransZorb Zener TVS, 1500W peak pulse, 47.8V reverse standoff, 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":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Last Time Buy","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","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","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":"$0.3093","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE56A-/51 and how is it quoted?","answer":"We source the 1.5KE56A-/51 through independent distribution against an RFQ."},{"question":"What is the closest pin-compatible alternative to the 1.5KE56A-/51?","answer":"The TransZorb family includes many 1.5KE parts with different standoff voltages, but a direct replacement for this exact order code is not documented."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE56A-E3-51","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/1.5KE56A-E3-51 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}}