{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TS420-600T","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TS420-600T","canonicalUrl":"https://icboms.com/stmicroelectronics/TS420-600T","factsUrl":"https://icboms.com/api/mcp/products/TS420-600T","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TS420-600T SCR, Sensitive Gate type, 600 V off-state, 4 A RMS on-state, TO-220-3 through-hole package, tube.","salesMarkdown":"## 4 A RMS sensitive-gate SCR for 240 VAC line switching The TS420-600T is a sensitive-gate SCR rated for 600 V off-state blocking and 4 A RMS on-state current in a TO-220 package — sized for phase-control and AC-switching circuits where a low gate trigger current simplifies the drive stage. With a maximum gate trigger current of 200 µA and gate trigger voltage of 800 mV, this SCR can be driven directly from a microcontroller I/O pin, a low-power Hall-effect sensor, or a simple transistor stage without a separate driver IC. ## On-state and surge ratings — what they mean for the circuit The 2.5 A average (IT(AV)) and 4 A RMS (IT(RMS)) on-state current ratings define the continuous load the SCR can carry in a half-wave or full-wave rectifier, a heater controller, or a small motor speed-control circuit — the RMS figure governs the thermal stress from the conduction angle, not just the DC average. Holding current is 5 mA maximum, and off-state leakage is 5 µA maximum — the low holding current means the SCR stays latched once triggered even with a light load, while the low leakage at 600 V off-state keeps standby power loss negligible in a switched-mode or capacitive-discharge circuit. ## Package and thermal integration The TO-220-3 (supplier device package TO-220) is a standard through-hole power package with a metal tab — the tab is electrically common with the cathode (pin 2) in most SCRs, so the heatsink must be isolated or the tab must be electrically floating if multiple devices share a common heatsink. ROHS3 compliant — the part meets the current RoHS directive for lead-free soldering and restricted substance limits, which is required for CE-marked equipment sold in the EU and for most commercial electronics manufactured after 2015.","metaTitle":"TS420-600T SCR, 600V 4A, Sensitive Gate, TO-220","metaDescription":"TS420-600T SCR, 600V off-state, 4A RMS, sensitive gate (200 µA Igt). Active production, ROHS3 compliant. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","SCR Type":"Sensitive Gate","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Voltage - Off State":"600 V","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"5 mA","Current - Off State (Max)":"5 µA","Voltage - On State (Vtm) (Max)":"1.6 V","Current - Gate Trigger (Igt) (Max)":"200 µA","Current - On State (It (AV)) (Max)":"2.5 A","Voltage - Gate Trigger (Vgt) (Max)":"800 mV","Current - On State (It (RMS)) (Max)":"4 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"30A, 33A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.42","priceTiers":[{"qty":1,"price":"$1.42000","currency":"USD"},{"qty":10,"price":"$1.26600","currency":"USD"},{"qty":100,"price":"$0.98690","currency":"USD"},{"qty":500,"price":"$0.81526","currency":"USD"},{"qty":1000,"price":"$0.70840","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9bff7aa1b4ac956f2134ecb9c7aa992d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TS420-600T/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TS420-600T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TS420-600T 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}}