{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MOC3051M","brand":"onsemi","brandSlug":"onsemi","productSlug":"MOC3051M","canonicalUrl":"https://icboms.com/onsemi/MOC3051M","factsUrl":"https://icboms.com/api/mcp/products/MOC3051M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi MOC3051M optoisolator, Triac output, 1 channel, 600 V off-state, 4170 Vrms isolation, 1 kV/µs dV/dt, Through Hole 6-DIP, Tube.","salesMarkdown":"## Triac output and isolation for AC load switching The onsemi MOC3051M is a single-channel optoisolator with a Triac output, designed to drive AC loads such as solenoids, motors, or TRIACs in solid-state relay circuits. The 4170 Vrms isolation rating provides galvanic separation between the low-voltage control side and the high-voltage AC line, meeting UL recognized component requirements. ## 1 kV/µs dV/dt and non-zero-crossing trigger With a minimum static dV/dt of 1 kV/µs, the output Triac resists false turn-on from fast-rising mains transients — critical when switching inductive loads like contactors or motor starters where line noise is common. The absence of a zero-crossing circuit (Zero Crossing Circuit = No) means the output fires immediately when the LED current exceeds the 15 mA max trigger threshold, enabling phase-angle control for dimmers or soft-start circuits. Off-state voltage is rated 600 V, suitable for 240 VAC line switching with margin for surges. The typical hold current of 220 µA keeps the Triac latched once triggered, preventing dropout on lightly loaded circuits.","metaTitle":"onsemi MOC3051M Optoisolator, Triac Output, 600 V, 6-DIP","metaDescription":"onsemi MOC3051M optoisolator with Triac output, 600 V off-state, 4170 Vrms isolation, 1 kV/µs dV/dt. Active, ROHS3 compliant. Order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Output Type":"Triac","Mounting Type":"Through Hole","Package / Case":"6-DIP (0.300\\\", 7.62mm)","Approval Agency":"UR","lifecycle_stage":"eol_hot","Number of Channels":"1","Static dV/dt (Min)":"1kV/µs","Current - Hold (Ih)":"220µA (Typ)","Voltage - Isolation":"4170Vrms","Voltage - Off State":"600 V","Operating Temperature":"-40°C ~ 85°C","Zero Crossing Circuit":"No","Supplier Device Package":"6-DIP","Voltage - Forward (Vf) (Typ)":"1.18V","Current - DC Forward (If) (Max)":"60 mA","Current - LED Trigger (Ift) (Max)":"15mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.12","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.12000","currency":"USD"},{"qty":10,"price":"$0.72800","currency":"USD"},{"qty":100,"price":"$0.47710","currency":"USD"},{"qty":1000,"price":"$0.37663","currency":"USD"},{"qty":2000,"price":"$0.35152","currency":"USD"},{"qty":5000,"price":"$0.33897","currency":"USD"},{"qty":10000,"price":"$0.33394","currency":"USD"},{"qty":25000,"price":"$0.32641","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/acedf076ec9cc11d748fc2dec88103ed.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the MOC3051M used for?","answer":"The MOC3051M is a Triac-output optoisolator used to switch AC loads such as solenoids, motors, or TRIACs in solid-state relays, providing 4170 Vrms isolation between control and load circuits."},{"question":"What is the closest functional second-source to MOC3051M?","answer":"The MOC3073M is a close peer: same 1 kV/µs dV/dt, 4170 Vrms isolation, single-channel Triac output, and through-hole 6-DIP package. The key difference is the MOC3073M has a lower switching current rating (6 mA vs the MOC3051M's 15 mA max trigger current). Verify the trigger threshold in your circuit before substituting."},{"question":"Will MOC3051M drop into a board designed for MOC3073M?","answer":"The trigger current difference (15 mA max for MOC3051M vs 6 mA for MOC3073M) may require adjusting the LED drive resistor if the circuit was optimized for the lower threshold."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/MOC3051M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/MOC3051M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}