{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HCPL3700M","brand":"onsemi","brandSlug":"onsemi","productSlug":"HCPL3700M","canonicalUrl":"https://icboms.com/onsemi/HCPL3700M","factsUrl":"https://icboms.com/api/mcp/products/HCPL3700M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi HCPL3700M, single-channel optoisolator, 5000Vrms isolation, AC/DC input, Darlington output, 8-DIP through-hole package, -40°C to 85°C operation.","salesMarkdown":"## AC/DC input optoisolator for line-voltage sensing The HCPL3700M from onsemi is a single-channel optoisolator that accepts both AC and DC inputs — a feature that lets it directly sense mains-voltage presence (e.g., 120/240 VAC) through a simple resistor divider, without an external rectifier bridge. Its 5000Vrms isolation rating provides the safety margin needed for industrial control, motor drives, and power-supply monitoring where the input side may be at line potential and the output side connects to a low-voltage logic or PLC input. The Darlington output delivers up to 30 mA per channel at 20 V max, enough to drive a relay coil or a PLC input module directly, but the 45 µs typical rise time means the switching speed is limited to a few kilohertz — not for high-speed data. Packaged in tubes (the standard DIP-8 through-hole format), the HCPL3700M is also available in tape-and-reel for SMT assembly as the HCPL3700SVM — same die, different package. For volume requirements, the tube quantity is typically 50 per tube; confirm the exact reel/tube quantity when quoting. The 8-DIP (0.300-inch, 7.62 mm) through-hole package is a standard footprint that fits into sockets or solders directly into plated-through holes. The 0.100-inch pin pitch is breadboard-friendly and easy to probe during bring-up. For extended-range needs (e.g., 105°C or 125°C), look at the 4N29M which is rated to 100°C, but note its lower isolation (4170Vrms). ## Switching timing and output drive Turn-on time is 6 µs typical, turn-off is 25 µs typical — the asymmetry is due to the Darlington pair's storage time. This means the output stays on longer than off for a symmetric input waveform; account for the 25 µs turn-off delay in timing budgets for fault-detection or zero-crossing circuits. The rise/fall times (45 µs rise, 0.5 µs fall) indicate the output switches off much faster than it switches on. For applications like AC line-cycle monitoring (50/60 Hz), the 6 µs turn-on is negligible; for higher-frequency PWM or serial data, the Darlington output will limit throughput. Maximum output voltage is 20 V, and continuous output current is 30 mA per channel — enough to drive a 5 V or 12 V logic input, a small relay (e.g., 5 V, 20 mA coil), or an LED indicator. For higher-current loads, use the output to switch an external transistor or MOSFET.","metaTitle":"HCPL3700M onsemi Optoisolator – 5000Vrms, AC/DC Input","metaDescription":"HCPL3700M onsemi optoisolator. 5000Vrms isolation, AC/DC input, Darlington output, -40°C to 85°C. Active production, through-hole DIP-8. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"AC, DC","Output Type":"Darlington","Mounting Type":"Through Hole","Package / Case":"8-DIP (0.300\\\", 7.62mm)","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"HCPL3700","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Rise / Fall Time (Typ)":"45µs, 0.5µs","Voltage - Output (Max)":"20V","Supplier Device Package":"8-DIP","Current - Output / Channel":"30mA","Current Transfer Ratio (Max)":"-","Current Transfer Ratio (Min)":"-","Voltage - Forward (Vf) (Typ)":"-","Turn On / Turn Off Time (Typ)":"6µs, 25µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.7100","priceTiers":[{"qty":1,"price":"$8.09000","currency":"USD"},{"qty":10,"price":"$5.86500","currency":"USD"},{"qty":100,"price":"$4.84600","currency":"USD"},{"qty":500,"price":"$4.24410","currency":"USD"},{"qty":1000,"price":"$4.01260","currency":"USD"},{"qty":2000,"price":"$3.92000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/dcc6b59d872bfc07448724a9d5762d79.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/HCPL3700M/alternatives.json"},"ai":{"faq":[{"question":"What is the input type of the HCPL3700M?","answer":"The HCPL3700M accepts both AC and DC inputs. This allows direct connection to mains AC voltage (via a series resistor) without an external rectifier — a key differentiator from DC-only optoisolators like the FOD2741BV."},{"question":"What are the equivalents for the HCPL3700M?","answer":"The closest functional second-source is the HCPL3700SVM — same die, same AC/DC input and Darlington output, but in a surface-mount package. For a DC-input alternative with transistor output, consider the FOD2741BV. The 4N29M is a through-hole Darlington but with DC-only input and lower isolation (4170Vrms)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/HCPL3700M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/HCPL3700M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}