{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VO4258H","brand":"Vishay","brandSlug":"vishay","productSlug":"VO4258H","canonicalUrl":"https://icboms.com/vishay/VO4258H","factsUrl":"https://icboms.com/api/mcp/products/VO4258H","rawCanonicalId":null},"summary":{"shortDescription":"Vishay VO4258H optoisolator, Triac output, 5300Vrms isolation, 800V off-state voltage, 300mA on-state current, 5kV/µs dV/dt, through-hole 6-DIP package, -55°C to 100°C.","salesMarkdown":"## 5300 Vrms isolation, 800 V off-state — the AC load isolator The Vishay VO4258H is a single-channel optoisolator with a Triac output, designed to switch AC loads from a low-voltage control side while providing 5300 Vrms galvanic isolation. It handles an off-state voltage of 800 V and can conduct up to 300 mA RMS on-state current, making it a fit for driving solenoids, small motors, relays, and resistive AC loads in industrial and appliance controls. ## 5 kV/µs dV/dt — why it matters for inductive loads The minimum static dV/dt of 5 kV/µs is the key spec for this part class. When switching inductive loads like a contactor coil or a small transformer, the rapid voltage rise across the Triac after turn-off can falsely trigger it back on if the dV/dt immunity is too low. The VO4258H's 5 kV/µs rating gives solid margin for 50/60 Hz line applications without an external snubber in many cases. There is no zero-crossing circuit, so the Triac fires immediately on the LED trigger — useful for phase-control or random-turn-on schemes, but the load current must be considered for EMI. ## Temperature range and approvals It carries approvals from BSI, cUR, FIMKO, and UR, easing compliance for equipment sold into North American and European markets. The LED forward voltage is 1.2 V typical, with a maximum DC forward current of 60 mA and a maximum LED trigger current of 2 mA — the low trigger current means a standard GPIO or open-collector output can drive it directly.","metaTitle":"VO4258H Optoisolator, Triac Output, 5300Vrms, 800V Off-State","metaDescription":"VO4258H optoisolator with Triac output, 5300Vrms isolation, 800V off-state voltage, 5kV/µs dV/dt. Through-hole 6-DIP. Active, ROHS3.","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":"BSI, cUR, FIMKO, UR","lifecycle_stage":"eol_hot","Number of Channels":"1","Static dV/dt (Min)":"5kV/µs","Voltage - Isolation":"5300Vrms","Voltage - Off State":"800 V","Operating Temperature":"-55°C ~ 100°C","Zero Crossing Circuit":"No","Supplier Device Package":"6-DIP","Voltage - Forward (Vf) (Typ)":"1.2V","Current - DC Forward (If) (Max)":"60 mA","Current - LED Trigger (Ift) (Max)":"2mA","Current - On State (It (RMS)) (Max)":"300 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.41","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.41000","currency":"USD"},{"qty":10,"price":"$2.27700","currency":"USD"},{"qty":100,"price":"$1.75190","currency":"USD"},{"qty":500,"price":"$1.58368","currency":"USD"},{"qty":1000,"price":"$1.36098","currency":"USD"},{"qty":2000,"price":"$1.28674","currency":"USD"},{"qty":5000,"price":"$1.25705","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/fb48d81c4f290eff0e6b2926ae37dede.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/VO4258H","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/VO4258H when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}