{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MOC3073SM","brand":"onsemi","brandSlug":"onsemi","productSlug":"MOC3073SM","canonicalUrl":"https://icboms.com/onsemi/MOC3073SM","factsUrl":"https://icboms.com/api/mcp/products/MOC3073SM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi MOC3073SM, random-phase triac output optoisolator, 1-channel, 4170 Vrms isolation, 800 V off-state, 6-SMD gull-wing package, tube, -40 to 85 °C","salesMarkdown":"## Random-phase triac driver for AC load switching The MOC3073SM is an onsemi random-phase (non-zero-crossing) triac output optoisolator. It drives a triac or SCR in the AC power path, firing at any point in the mains cycle — the phase angle is set by the LED trigger current, not by a zero-cross detect circuit. Rated for 4170 Vrms isolation between the logic-side LED and the output triac, it suits line-voltage applications up to 800 V off-state. The 1 kV/µs minimum static dV/dt keeps the output from false-triggering on fast line transients or inductive kickback. Operating temperature spans -40 to 85 °C, covering outdoor telecom cabinets, factory-floor motor starters, and HVAC damper controls without a temperature derate. ## Trigger current and hold current margins Maximum LED trigger current (Ift) is 6 mA. Typical hold current (Ih) is 540 µA. Forward voltage (Vf) is 1.18 V typical, and the LED can handle up to 60 mA continuous DC forward current, giving headroom for higher drive to reduce trigger delay in phase-angle applications.","metaTitle":"MOC3073SM onsemi Optoisolator Triac Output 4170 Vrms","metaDescription":"MOC3073SM onsemi random-phase triac output optoisolator, 4170 Vrms isolation, 800 V off-state, 1 kV/µs dV/dt, -40 to 85 °C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Output Type":"Triac","Mounting Type":"Surface Mount","Package / Case":"6-SMD, Gull Wing","Approval Agency":"UL","lifecycle_stage":"eol_hot","Number of Channels":"1","Static dV/dt (Min)":"1kV/µs","Current - Hold (Ih)":"540µA (Typ)","Voltage - Isolation":"4170Vrms","Voltage - Off State":"800 V","Operating Temperature":"-40°C ~ 85°C","Zero Crossing Circuit":"No","Supplier Device Package":"6-SMD","Voltage - Forward (Vf) (Typ)":"1.18V","Current - DC Forward (If) (Max)":"60 mA","Current - LED Trigger (Ift) (Max)":"6mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.68","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.68000","currency":"USD"},{"qty":10,"price":"$1.06600","currency":"USD"},{"qty":100,"price":"$0.78890","currency":"USD"},{"qty":500,"price":"$0.72492","currency":"USD"},{"qty":1000,"price":"$0.59699","currency":"USD"},{"qty":2000,"price":"$0.56714","currency":"USD"},{"qty":5000,"price":"$0.55435","currency":"USD"},{"qty":10000,"price":"$0.54156","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a46db98a3628ad225aee84d44c37cec1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is MOC3073SM zero crossing or random phase?","answer":"Random phase — it has no zero-crossing circuit. The triac fires at whatever phase angle the LED trigger current is applied, making it suitable for phase-control dimmers, soft-start circuits, and universal-motor speed controls."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/MOC3073SM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/MOC3073SM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:08:57.363Z","lastPublished":"2026-07-17T20:08:57.363Z","indexable":true}}