{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TYN408GRG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TYN408GRG","canonicalUrl":"https://icboms.com/stmicroelectronics/TYN408GRG","factsUrl":"https://icboms.com/api/mcp/products/TYN408GRG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TYN408GRG standard-recovery SCR, 400 V off-state voltage, 8 A RMS on-state current, 80 A non-repetitive surge, TO-220-3 through-hole package, -40°C to 125°C operating temperature.","salesMarkdown":"## 400 V blocking, 8 A continuous — phase-control workhorse The STMicroelectronics TYN408GRG is a standard-recovery SCR in a TO-220-3 through-hole package, rated for 400 V off-state voltage and 8 A RMS on-state current. It is designed for line-voltage phase-control applications such as motor speed controllers, heater regulators, and AC power switching where a simple, rugged thyristor is the right fit. ## Surge margin and gate drive Non-repetitive surge current is 80 A for 50 Hz and 84 A for 60 Hz half-cycle, giving headroom for capacitor inrush or motor start transients. Gate trigger current is 25 mA max and gate trigger voltage is 1.5 V max — compatible with standard optocoupler or pulse-transformer drive circuits without extra amplification. The TO-220-3 package with a metal tab allows heatsink mounting for continuous 8 A RMS conduction; the tab is electrically common with the cathode. ROHS3 compliant, no exemptions that would complicate EU or UKCA declarations.","metaTitle":"STMicroelectronics TYN408GRG SCR, 400 V 8 A, TO-220-3","metaDescription":"Standard-recovery SCR, 400 V off-state, 8 A RMS on-state, 80 A surge. Active production, ROHS3 compliant, TO-220-3 package.","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":"TYN408","Voltage - Off State":"400 V","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"45 mA","Current - Off State (Max)":"5 µA","Voltage - On State (Vtm) (Max)":"1.6 V","Current - Gate Trigger (Igt) (Max)":"25 mA","Current - On State (It (AV)) (Max)":"5 A","Voltage - Gate Trigger (Vgt) (Max)":"1.5 V","Current - On State (It (RMS)) (Max)":"8 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"80A, 84A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5000","priceTiers":[{"qty":1,"price":"$1.58000","currency":"USD"},{"qty":10,"price":"$1.41000","currency":"USD"},{"qty":100,"price":"$1.09950","currency":"USD"},{"qty":500,"price":"$0.90832","currency":"USD"},{"qty":1000,"price":"$0.78925","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f28c64118d6d09098ea49e046a7c5422.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TYN408GRG/alternatives.json"},"ai":{"faq":[{"question":"What is the TYN408GRG's surge current rating?","answer":"This covers typical inrush from motor starts or capacitive loads in phase-control circuits."},{"question":"Can I replace TYN408GRG with a higher-current SCR?","answer":"A higher-current SCR in the same TO-220-3 package may be pin-compatible, but the gate trigger characteristics and holding current differ. The TYN408GRG has a 25 mA max gate trigger and 45 mA max holding current; a replacement must match these thresholds to avoid misfiring or failure to latch in the same drive circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TYN408GRG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TYN408GRG 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}}