{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6466","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6466","canonicalUrl":"https://icboms.com/microchip/1N6466","factsUrl":"https://icboms.com/api/mcp/products/1N6466","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6466, Zener diode, 500W peak pulse power, 33V minimum breakdown voltage, 30.5V reverse standoff, through-hole axial package (B, Axial), -55°C to 175°C junction temperature.","salesMarkdown":"The 1N6466 is a 500W peak pulse Zener diode from Microchip Technology, designed for general-purpose circuit protection in through-hole axial packages (B, Axial). Its 33V minimum breakdown voltage and 30.5V reverse standoff make it a fit for clamping transients on 24V to 30V DC rails where the normal operating voltage stays below the standoff threshold. With a single unidirectional channel and a peak pulse current rating of 63A under the 8/20µs waveform, this diode handles moderate surge events without power line protection features — it is a straightforward shunt clamp, not a TVS array or multi-line protector. ## Breakdown voltage and clamping — the numbers that matter for rail protection The 33V minimum breakdown and 47.5V maximum clamping at Ipp define the protection window. A 30.5V standoff means the diode stays off below that rail voltage; once the transient pushes above 33V the diode starts conducting, clamping the spike to 47.5V worst-case. For a 24V nominal bus, that leaves a 6.5V margin before the diode turns on — enough to avoid nuisance triggering from normal ripple. The 500W peak pulse rating at the 10/1000µs waveform is the energy-handling ceiling. In a 24V system with a 63A peak current (8/20µs), the diode absorbs the surge without exceeding its thermal limit, provided the duty cycle is low. The 175°C maximum junction temperature gives headroom for high-ambient environments like industrial enclosures or under-hood electronics. ## Lifecycle and sourcing posture The through-hole axial package is a standard form factor that remains widely supported across distribution channels. ## Package and mounting — through-hole axial The B, Axial package is a two-lead through-hole format with a glass or epoxy body. The lead spacing and body diameter follow the standard JEDEC outline for axial-lead Zener diodes. Mounting requires a drilled PCB with plated through-holes; the leads are typically bent and soldered on the opposite side. No exposed thermal pad or surface-mount footprint — the heat path is through the leads and the solder joint into the copper trace.","metaTitle":"1N6466 Zener Diode – 33V Breakdown, 500W Peak Pulse","metaDescription":"1N6466 Zener diode from Microchip Technology: 33V min breakdown, 500W peak pulse, 30.5V standoff, through-hole axial package. Active lifecycle, -55°C to 175°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Microchip Technology","Type":"Zener","Series":"-","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"B, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"500W","Base Product Number":"1N6466","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"Axial","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"33V","Voltage - Clamping (Max) @ Ipp":"47.5V","Voltage - Reverse Standoff (Typ)":"30.5V","Current - Peak Pulse (10/1000µs)":"63A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.9100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e98ac610a1de8a2054ffc6757c2a948b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package type does the 1N6466 use?","answer":"It comes in a B, Axial through-hole package, also referred to as an axial-lead DO-41 or similar outline. The leads are solderable into plated through-holes on a PCB."},{"question":"Can the 1N6466 replace a 1N6267?","answer":"The 1N6267 is a different Zener voltage grade within the same family; the 1N6466 has a 33V breakdown versus the 1N6267's lower voltage. They are not direct drop-in replacements unless the circuit's standoff and clamping requirements match the 1N6466's 30.5V standoff and 47.5V clamp. Verify the rail voltage and transient energy before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6466","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6466 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}