{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6277A-E3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1N6277A-E3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6277A-E3-73","factsUrl":"https://icboms.com/api/mcp/products/1N6277A-E3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor, TransZorb® TVS diode, 1N6277A-/73, unidirectional, 1500W peak pulse, 15.3V standoff / 25.2V clamping, DO-201AA axial, -55°C to 175°C junction, Tape & Box.","salesMarkdown":"## 1500W peak pulse — what the clamping rating means The 1N6277A-E3/73: At that pulse width, the device dissipates the surge energy by clamping the voltage at or below the specified breakdown window rather than allowing the transient to propagate downstream to sensitive ICs. The 59.5A peak pulse current is the unclamped current the diode must survive during the event — above this the lead-frame and die metallurgy set the hard failure boundary. Once triggered, the device clamps at 25.2V maximum, which defines the maximum voltage exposed to the load. A 25.2V ceiling is tight enough to protect downstream logic referenced to a 15V or 12V rail, but the designer must confirm the clamped voltage sits within the absolute-maximum rating of whatever follows the TVS. ## Temperature and polarity — what the ratings define A 175°C Tj ceiling combined with a 1500W peak pulse rating positions this part in industrial or avionics power-distribution boards where ambient temperatures swing wide; the high temperature grade avoids the derating curve becoming the limiting constraint on those jobs. The device is unidirectional and explicitly listed as not rated for power line protection — it clamps transients on a single polarity, not on AC mains. For a 24 VDC control bus this is the correct device class; for a 230 VAC input you need a bidirectional or a mains-rated TVS designed to the relevant safety standard. ## Package and mounting — DO-201AA axial fit The DO-201AA (also referenced as DO-27) axial package mounts through-hole on a PCB — the leads are the thermal path and the electrical connection, so solder joint integrity at both leads directly affects the device's ability to dissipate the surge pulse without going into thermal runaway. The Tape & Box packaging is the through-hole reel format; confirm your board assembly handler's pitch spacing and lead-forming parameters against the DO-201AA body length before committing to the placement profile. The 1.5KE device package style groups this part into a standard TVS footprint — the cathode band identifies polarity on the axial body. Double-check the band marking direction against your board layout before reflow, since axial components are hand-inserted in most panel-assembly flows and can be seated in either orientation. ## Sourcing posture For boards already in production this Active status means the line stays open; for new designs the absence of a cross-reference successor makes qualification at RFQ the moment to lock in a second-source TVS with the same standoff and clamping window.","metaTitle":"Vishay 1N6277A-E3/73 TVS Diode, 1.5 kW Peak Pulse","metaDescription":"Vishay 1N6277A-E3/73 unidirectional TVS diode, 1500W peak pulse, 15.3V standoff, 25.2V clamping. TransZorb series, DO-201AA axial. Sourced to order on RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1N6277","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"17.1V","Voltage - Clamping (Max) @ Ipp":"25.2V","Voltage - Reverse Standoff (Typ)":"15.3V","Current - Peak Pulse (10/1000µs)":"59.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3851","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6277A-E3%2F73/alternatives.json"},"ai":{"faq":[{"question":"What is the 1N6277A-/73 used for?","answer":"It is a unidirectional TVS diode — a transient voltage suppressor — in the TransZorb series. General-purpose applications include protecting low-voltage control rails, sensor lines, and DC power bus nodes from surge and ESD events. It is not rated for AC power line protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6277A-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/1N6277A-E3-73 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}