{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TYN840RG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TYN840RG","canonicalUrl":"https://icboms.com/stmicroelectronics/TYN840RG","factsUrl":"https://icboms.com/api/mcp/products/TYN840RG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TYN840RG standard recovery SCR, 800 V off-state voltage, 40 A RMS on-state current, 480 A non-repetitive surge, TO-220-3 through-hole package, -40°C to 125°C operating temperature.","salesMarkdown":"## 800 V blocking, 40 A conducting — the TO-220 SCR for line-voltage switching The STMicroelectronics TYN840RG is a standard-recovery SCR in a TO-220-3 through-hole package, rated to block 800 V off-state and conduct 40 A RMS continuous. The 480 A non-repetitive surge capacity (60 Hz) handles motor inrush and capacitor charging events without exceeding the junction's thermal limit. ## Gate drive and on-state drop — the numbers that set the driver budget Gate trigger current is 35 mA maximum, with a maximum trigger voltage of 1.3 V — the driver stage must source at least this into the gate-cathode loop, plus margin for cold-temperature operation where Igt rises. On-state voltage is 1.6 V maximum at rated current; at 25 A average this puts conduction loss near 40 W, so the TO-220 tab needs a heatsink sized for the duty cycle. The 75 mA holding current means the load current must stay above this threshold to keep the SCR latched; below it the device will commutate off.","metaTitle":"STMicroelectronics TYN840RG SCR, 800 V 40 A TO-220-3","metaDescription":"ST TYN840RG standard recovery SCR, 800 V off-state, 40 A RMS, 480 A surge. TO-220-3, -40 to 125°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","SCR Type":"Standard Recovery","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"TYN840","Voltage - Off State":"800 V","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"75 mA","Current - Off State (Max)":"5 µA","Voltage - On State (Vtm) (Max)":"1.6 V","Current - Gate Trigger (Igt) (Max)":"35 mA","Current - On State (It (AV)) (Max)":"25 A","Voltage - Gate Trigger (Vgt) (Max)":"1.3 V","Current - On State (It (RMS)) (Max)":"40 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"460A, 480A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.3300","priceTiers":[{"qty":1,"price":"$4.33000","currency":"USD"},{"qty":10,"price":"$3.63400","currency":"USD"},{"qty":100,"price":"$2.93970","currency":"USD"},{"qty":500,"price":"$2.61308","currency":"USD"},{"qty":1000,"price":"$2.23744","currency":"USD"},{"qty":2000,"price":"$2.10679","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/78b6b4ea0d4470699fbd3c83e8b00e0f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TYN840RG/alternatives.json"},"ai":{"faq":[{"question":"What is the gate trigger current of TYN840RG?","answer":"The maximum gate trigger current (Igt) is 35 mA, and the maximum gate trigger voltage (Vgt) is 1.3 V."},{"question":"Can TYN840RG be used for 800 V AC switching?","answer":"Yes. The 800 V off-state voltage rating is sufficient for 480 VAC line switching with standard derating, and the 480 A surge capability covers common inrush profiles in motor and power-supply applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TYN840RG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TYN840RG 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}}