{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MOC3073SR2M","brand":"onsemi","brandSlug":"onsemi","productSlug":"MOC3073SR2M","canonicalUrl":"https://icboms.com/onsemi/MOC3073SR2M","factsUrl":"https://icboms.com/api/mcp/products/MOC3073SR2M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi MOC3073SR2M, 1-channel random-phase triac output optoisolator, 4170 Vrms isolation, 800 V off-state, 6-SMD Gull Wing package, Tape & Reel.","salesMarkdown":"## Triac driver for AC load switching The onsemi MOC3073SR2M is a single-channel random-phase triac output optoisolator in a 6-SMD Gull Wing package. It provides 4170 Vrms isolation between the low-voltage control side and the 800 V off-state rated AC load side, making it suitable for switching 240 VAC loads with margin for mains transients. Because it lacks a zero-crossing circuit, the output triac can be triggered at any point in the AC waveform — this is the key distinction for phase-angle control applications like dimmers, soft-starters, or heater power regulators. The operating temperature range of -40°C to 85°C covers industrial enclosures and outdoor equipment without requiring a mil-spec part. ## LED drive and noise immunity The LED trigger current is 6 mA maximum, which means a standard 3.3 V or 5 V GPIO can drive the input through a series resistor without a separate driver transistor. Forward voltage is 1.18 V typical at 60 mA max DC forward current. Static dV/dt immunity is a minimum of 1 kV/µs. In an inductive load environment — a motor contactor or relay coil — this prevents the triac from falsely triggering on the voltage spike at commutation. Typical hold current is 540 µA. If the load current drops below this near the AC zero-cross, the triac may self-commutate; this matters for very low-power loads or when using the part in a snubberless design. ## Sourcing and lifecycle status Supplied in Tape & Reel (TR) and Cut Tape (CT) options for the 6-SMD Gull Wing package. UL approved — the agency listing is on the datasheet, which covers the safety certification needed for mains-isolated designs. ## Package and board integration The 6-SMD Gull Wing package has a 0.50 mm lead pitch typical for this family. The gull-wing leads are visible for solder inspection, and the package body stands off the board slightly, aiding cleaning and conformal coating. Surface-mount assembly — no through-hole holes needed on the PCB. The creepage distance between input and output pins across the package surface meets the 4170 Vrms isolation rating, but the PCB layout must maintain the same clearance under the component.","metaTitle":"MOC3073SR2M onsemi Optoisolator Triac Output 4170 Vrms 6-SMD","metaDescription":"onsemi MOC3073SR2M random-phase triac driver, 4170 Vrms isolation, 800 V off-state, 1 kV/µs dV/dt. Active, ROHS3. Tape & Reel. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","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 MOC3073SR2M obsolete?","answer":"No, the part is listed as active with no end-of-life notice. It remains available for new designs and production replenishment."},{"question":"Does MOC3073SR2M have a zero-crossing circuit?","answer":"No. The datasheet explicitly lists 'Zero Crossing Circuit: No'. This is a random-phase (non-zero-crossing) triac driver, so the output can be triggered at any point in the AC cycle."},{"question":"What is the closest functional alternative to MOC3073SR2M?","answer":"The MOC3072SR2VM is a near sibling with the same 4170 Vrms isolation, 1 kV/µs dV/dt, no zero-crossing, and 6-SMD package. The primary difference is the LED trigger current: the MOC3073SR2M has a 6 mA max trigger, while the MOC3072SR2VM has a 10 mA max trigger. If your drive current is tight, the MOC3073SR2M is easier to drive from a logic output."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/MOC3073SR2M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/MOC3073SR2M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:09:03.420Z","lastPublished":"2026-07-17T20:09:03.420Z","indexable":true}}