{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"T405-600B","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"T405-600B","canonicalUrl":"https://icboms.com/stmicroelectronics/T405-600B","factsUrl":"https://icboms.com/api/mcp/products/T405-600B","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics T405-600B TRIAC, Logic - Sensitive Gate, 600 V Off State, 4 A RMS On State, Single, Surface Mount, DPAK (TO-252), Tube.","salesMarkdown":"## What the 5 mA gate trigger means for your drive circuit The T405-600B is a logic-level (sensitive-gate) triac with a maximum gate trigger current of 5 mA and a maximum gate trigger voltage of 1.3 V. The 4 A RMS on-state current rating sets the continuous load ceiling. In a 240 VAC line, that is roughly 960 VA of resistive load; for inductive loads like a small fan or solenoid valve, derate to about 60-70% of the RMS figure to stay inside the junction temperature limit. ## Package and rework — DPAK on the bench Housed in a DPAK (TO-252) surface-mount package with a single exposed tab on the back side. The tab is the MT2 terminal and carries the thermal path to the board copper. The three-lead footprint is standard and reworkable with hot air — the tab solders to a pad on the PCB, so the board layout should include a thermal relief pattern that lets the joint reflow without wicking all the heat into the ground plane. Supplied in tube, not tape-and-reel. For a pick-and-place line, plan to transfer parts into a tape carrier or hand-place them for prototype runs. The tube packaging is fine for bench builds and small batches. ## Surge and holding current — the real-world limits Non-repetitive surge current is 30 A at 50 Hz and 31 A at 60 Hz. That covers the inrush from a 100 W incandescent lamp or a small motor start, but not a capacitor-input power supply — the surge rating is a half-cycle peak, not a repetitive event. Maximum holding current is 10 mA. Below that load current, the triac drops out of conduction at the next zero-crossing. For a very light load like a 5 W LED driver, the holding current may not be met and the triac will not latch — size the minimum load to stay above 10 mA. ## Active production and compliance It is a current-production part from STMicroelectronics, fully ROHS3 compliant.","metaTitle":"T405-600B TRIAC, Sensitive Gate 600V 4A DPAK","metaDescription":"T405-600B logic-level TRIAC, 600V off-state, 4A RMS, 5mA Igt. DPAK surface-mount, active production, ROHS3. Sourced to order — confirm availability at RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Triac Type":"Logic - Sensitive Gate","Configuration":"Single","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","lifecycle_stage":"eol_hot","Voltage - Off State":"600 V","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"DPAK","Current - Hold (Ih) (Max)":"10 mA","Current - Gate Trigger (Igt) (Max)":"5 mA","Voltage - Gate Trigger (Vgt) (Max)":"1.3 V","Current - On State (It (RMS)) (Max)":"4 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"30A, 31A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.37","priceTiers":[{"qty":1,"price":"$1.37000","currency":"USD"},{"qty":10,"price":"$1.22800","currency":"USD"},{"qty":100,"price":"$0.95740","currency":"USD"},{"qty":500,"price":"$0.79090","currency":"USD"},{"qty":1000,"price":"$0.68722","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/48084296574f91b045b9c46f17354319.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/T405-600B/alternatives.json"},"ai":{"faq":[{"question":"What is T405-600B's listed triac type and what does sensitive gate mean?","answer":"It is a Logic - Sensitive Gate triac."},{"question":"What compliance documentation does ST provide for T405-600B?","answer":"The part is ROHS3 Compliant per STMicroelectronics' declaration. No UL, IEC, or REACH certification is listed in the available documentation. RoHS compliance certificates are available from the manufacturer upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/T405-600B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/T405-600B 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}}