{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6315US/TR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6315US-TR","canonicalUrl":"https://icboms.com/microchip/1N6315US-TR","factsUrl":"https://icboms.com/api/mcp/products/1N6315US%2FTR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6315US/TR Zener diode, 4.3 V nominal, 500 mW, ±5% tolerance, SQ-MELF B package, surface mount, tape and reel.","salesMarkdown":"## 4.3 V Zener in a hermetic SQ-MELF The 1N6315US/TR is a 4.3 V Zener diode from Microchip Technology rated for 500 mW continuous power dissipation in the SQ-MELF B package. The ±5% tolerance on the nominal Zener voltage means the regulation point falls between 4.085 V and 4.515 V at the specified test current — tight enough for most reference and clamping applications in analog and mixed-signal circuits. The SQ-MELF (Surface Mount Metal Electrode Leadless Face) package is a hermetic ceramic body with metallized end caps — no plastic molding, no moisture absorption path. This construction suits high-reliability environments where outgassing or moisture ingress disqualifies standard SOT-23 or SOD-123 packages. ## Temperature range and thermal margin Operating junction temperature spans -65°C to 175°C — the full military temperature band. A 500 mW part in SQ-MELF dissipates heat through the end-cap solder joints and the board copper; at 175°C junction the derated power is near zero, so the actual allowable dissipation depends on the board's thermal resistance and the ambient temperature. Reverse leakage is specified at 2 µA maximum at 1 V reverse voltage — well below the Zener knee, confirming the diode is fully off before breakdown. Forward voltage is 1.4 V maximum at 1 A forward current, typical for a silicon junction this size.","metaTitle":"1N6315US/TR Zener Diode, 4.3 V, 500 mW, SQ-MELF, ±5%","metaDescription":"Microchip Technology 1N6315US/TR Zener diode, 4.3 V nominal, 500 mW dissipation, SQ-MELF B package, ±5% tolerance, -65°C to 175°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±5%","Power - Max":"500 mW","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, B","Product Status":"Active","lifecycle_stage":"eol_hot","Impedance (Max) (Zzt)":"20 Ohms","Operating Temperature":"-65°C ~ 175°C (TJ)","Supplier Device Package":"B, SQ-MELF","Voltage - Zener (Nom) (Vz)":"4.3 V","Current - Reverse Leakage @ Vr":"2 µA @ 1 V","Voltage - Forward (Vf) (Max) @ If":"1.4 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$12.7000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/950a1a5ef1d17a0e9b75efb616fa4721.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6315US%2FTR/alternatives.json"},"ai":{"faq":[{"question":"What package does the 1N6315US/TR use?","answer":"The 1N6315US/TR comes in a SQ-MELF B package — a hermetic surface-mount ceramic body with metallized end caps."},{"question":"What is the tolerance on the 1N6315US/TR Zener voltage?","answer":"The Zener voltage tolerance is ±5% on the 4.3 V nominal value, giving a regulation window of 4.085 V to 4.515 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6315US-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6315US-TR 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}}