{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTB12-800CWRG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BTB12-800CWRG","canonicalUrl":"https://icboms.com/stmicroelectronics/BTB12-800CWRG","factsUrl":"https://icboms.com/api/mcp/products/BTB12-800CWRG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics Snubberless™ alternistor triac, BTB12-800CWRG, 12 A RMS on-state, 800 V off-state, 120A/126A non-repetitive surge, TO-220-3 through-hole package, tube.","salesMarkdown":"## Alternistor triac for inductive loads The STMicroelectronics BTB12-800CWRG is a Snubberless™ alternistor triac rated for 12 A RMS on-state current and 800 V off-state voltage, housed in a TO-220-3 through-hole package. The alternistor construction means it commutates inductive loads — motors, solenoids, transformers — without the external snubber network a standard triac typically needs, because its internal structure handles the dV/dt stress from the load's back-EMF. The 35 mA gate trigger current and 1.3 V gate trigger voltage are standard for a 12 A class device — a logic-level signal from a microcontroller through a transistor driver will comfortably exceed these thresholds. The 35 mA holding current means the triac stays latched once triggered as long as the load current stays above that floor; below it the device turns off at the next zero-crossing. ## Surge and temperature margins Non-repetitive surge current is 120 A at 50 Hz and 126 A at 60 Hz — this is the peak current the die can withstand for one mains half-cycle without failing. In a motor-start or capacitor-inrush scenario, budget the surge duration and amplitude against this ceiling; a 12 A RMS triac with a 120 A surge rating gives roughly a 10× margin over the continuous rating, which is typical for this class. The junction temperature range spans -40°C to 125°C, covering industrial and outdoor enclosure environments. The 125°C upper limit is the die temperature, not the case — the TO-220 package's thermal resistance to the heatsink determines how much current can be carried at elevated ambient.","metaTitle":"STMicroelectronics BTB12-800CWRG Triac, 12 A, 800 V, TO-220","metaDescription":"STMicroelectronics BTB12-800CWRG Snubberless™ alternistor triac, 12 A RMS, 800 V off-state, 120A/126A surge, TO-220-3. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"Snubberless™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"Snubberless™","Package":"Tube","Triac Type":"Alternistor - Snubberless","Configuration":"Single","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Voltage - Off State":"800 V","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"35 mA","Current - Gate Trigger (Igt) (Max)":"35 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":"$1.92","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.92000","currency":"USD"},{"qty":10,"price":"$1.72100","currency":"USD"},{"qty":100,"price":"$1.38340","currency":"USD"},{"qty":500,"price":"$1.13656","currency":"USD"},{"qty":1000,"price":"$1.07222","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e7fb4c1e07a8ce388f995f99ba323456.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How does BTB12-800CWRG differ from BTB12-600CWRG?","answer":"The only parametric difference is the off-state voltage: 800 V on the BTB12-800CWRG versus 600 V on the BTB12-600CWRG. All other ratings — 12 A RMS on-state, 120A/126A surge, 35 mA gate trigger, TO-220-3 package, Snubberless alternistor construction — are identical. The 800 V variant suits mains supplies up to 480 VAC line-to-line with margin; the 600 V variant is adequate for 230 VAC or 277 VAC lines."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BTB12-800CWRG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BTB12-800CWRG 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}}