{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTA12-600BW","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BTA12-600BW","canonicalUrl":"https://icboms.com/stmicroelectronics/BTA12-600BW","factsUrl":"https://icboms.com/api/mcp/products/BTA12-600BW","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BTA12-600BW, Series Snubberless™, Triac Type Alternistor - Snubberless, Single, Through Hole, TO-220-3, 600 V Off State, 12 A RMS On State, -40°C~125°C.","salesMarkdown":"The STMicroelectronics BTA12-600BW is a Snubberless™ Alternistor triac rated for 600 V off-state voltage and 12 A RMS on-state current, housed in a TO-220 through-hole package. The Snubberless construction means it does not require an external RC snubber network when switching inductive loads like motors, solenoids, or transformers — a BOM simplification that saves board space and component cost. The Alternistor design also gives it higher dv/dt immunity than a standard triac, reducing the risk of false triggering from line transients. The BTA12-600BW requires a maximum gate trigger current of 50 mA and a maximum gate trigger voltage of 1.3 V to switch on. That 50 mA Igt is on the higher side compared to sensitive-gate triacs — your drive circuit (opto-coupler, logic output, or discrete transistor) needs to source that current reliably across temperature. The 50 mA maximum hold current means the triac will stay latched once triggered as long as the load current stays above that threshold; below 50 mA it will commutate off at the next zero-crossing. For designs running low-load currents (e.g., small fans or LED dimmers), verify the load current exceeds Ih over the full operating range or the triac may drop out mid-cycle. ## Surge capability and thermal margin Non-repetitive surge current (ITSM) is rated at 120 A for a 50 Hz half-cycle and 126 A for 60 Hz. This surge rating covers inrush from incandescent lamp loads, motor startup, or capacitor charging — but it is a non-repetitive limit, so repetitive surge events (e.g., frequent motor starts) need derating. The 12 A RMS continuous rating is the design anchor for trace width, heatsink sizing, and fuse coordination; a 12 A triac driving a 10 A resistive load leaves about 20% headroom, which is standard practice. New designs should not specify this part. For existing BOM lines, procurement must source through the independent surplus and broker channel. The BTB12-600BW is the same die in a different package variant (also TO-220, but with isolated tab), and is a common cross-reference candidate — verify pin compatibility for your specific layout before substituting.","metaTitle":"ST BTA12-600BW Snubberless Triac, 600V 12A TO-220","metaDescription":"STMicroelectronics BTA12-600BW Snubberless Alternistor triac, 600V off-state voltage, 12A RMS on-state current, TO-220 package. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"Snubberless™","Package":"Tube","Triac Type":"Alternistor - Snubberless","Configuration":"Single","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"BTA12","Voltage - Off State":"600 V","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"50 mA","Current - Gate Trigger (Igt) (Max)":"50 mA","Voltage - Gate Trigger (Vgt) (Max)":"1.3 V","Current - On State (It (RMS)) (Max)":"12 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"120A, 126A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.8100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5ef651cdc3141726518fd3e56c11b109.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BTA12-600BW/alternatives.json"},"ai":{"faq":[{"question":"Is the BTA12-600BW obsolete?","answer":"Yes, the BTA12-600BW is listed as Obsolete by STMicroelectronics. Production has ended and no last-time-buy is available. It must be sourced through surplus or broker channels."},{"question":"What is the replacement for BTA12-600BW?","answer":"STMicroelectronics does not list a direct pin-compatible successor for the BTA12-600BW. The BTB12-600BW is a common cross-shop candidate — it uses the same Snubberless Alternistor die in a TO-220 package with an isolated tab. Verify the tab isolation requirement for your heatsinking scheme before substituting. For new designs, consider current-production triacs in the BTA12 series (check the BTA12-x00xW family) or a discrete relay solution."},{"question":"What is the maximum gate trigger current for BTA12-600BW?","answer":"The maximum gate trigger current (Igt) is 50 mA, and the maximum gate trigger voltage (Vgt) is 1.3 V. Your drive circuit must source at least 50 mA reliably across the operating temperature range."},{"question":"Is there an SMD equivalent for BTA12-600BW?","answer":"The BTA12-600BW is a through-hole TO-220 part. STMicroelectronics offers surface-mount triacs in D²PAK and DPAK packages (e.g., the BTA12 series in D²PAK), but those are different order codes with different thermal characteristics. No direct SMD equivalent is listed for this specific obsolete code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BTA12-600BW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BTA12-600BW when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:25:46.099Z","lastPublished":"2026-07-16T14:25:46.099Z","indexable":true}}