{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCET1103","brand":"Vishay","brandSlug":"vishay","productSlug":"TCET1103","canonicalUrl":"https://icboms.com/vishay/TCET1103","factsUrl":"https://icboms.com/api/mcp/products/TCET1103","rawCanonicalId":null},"summary":{"shortDescription":"Vishay TCET1103, single-channel transistor-output optocoupler, 5000 Vrms isolation, 4-DIP through-hole package, 100–200 % CTR at 10 mA, 70 V output rating.","salesMarkdown":"## Galvanic isolation for industrial signal paths The TCET1103 is a Vishay single-channel optocoupler built for 5000 Vrms isolation between a DC input and a transistor output. That isolation rating suits it for breaking ground loops in PLC digital inputs, motor-drive feedback, and switched-mode power-supply secondary-side sensing. Current transfer ratio is guaranteed between 100 % and 200 % at a forward current of 10 mA. A 100 % minimum means the output transistor can sink at least 10 mA when the LED is driven at 10 mA — enough to pull a 5 V logic input low through a 470 Ω pull-up without an external buffer. Typical turn-on time is 6 µs, turn-off 5 µs, with rise and fall of 3 µs and 4.7 µs respectively. This is adequate for 10–100 kHz switching in relay drivers or low-speed isolated serial links, but not for high-speed data isolation. ## Active production — no end-of-life concern The through-hole 4-DIP package has no moisture sensitivity level, so it stores indefinitely in a dry cabinet or standard shelf without bake-out requirements. ## Package and temperature range for the board The 4-DIP (0.300-inch, 7.62 mm pitch) through-hole package fits standard 0.100-inch breadboard and PCB layouts. Operating temperature spans -40°C to 100°C, covering industrial enclosures and outdoor telecom cabinets without derating. Maximum output voltage is 70 V, and continuous output current per channel is 50 mA. The forward voltage is 1.25 V typical at rated current, so a 5 V logic output can drive the LED through a 330–390 Ω series resistor.","metaTitle":"TCET1103 Vishay Optoisolator – 5000 Vrms, Transistor Output","metaDescription":"Vishay TCET1103 optocoupler: 5000 Vrms isolation, 100–200% CTR at 10 mA, 70 V output, -40°C to 100°C. Active production, through-hole 4-DIP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Through Hole","Package / Case":"4-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"300mV","Operating Temperature":"-40°C ~ 100°C","Rise / Fall Time (Typ)":"3µs, 4.7µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-DIP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"200% @ 10mA","Current Transfer Ratio (Min)":"100% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.25V","Turn On / Turn Off Time (Typ)":"6µs, 5µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.54","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.54000","currency":"USD"},{"qty":10,"price":"$0.35500","currency":"USD"},{"qty":100,"price":"$0.23450","currency":"USD"},{"qty":1000,"price":"$0.18107","currency":"USD"},{"qty":2000,"price":"$0.16362","currency":"USD"},{"qty":5000,"price":"$0.15271","currency":"USD"},{"qty":10000,"price":"$0.14726","currency":"USD"},{"qty":25000,"price":"$0.14508","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c9931f06b9043d6a7d74bdd97dac7943.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) of TCET1103?","answer":"CTR is specified as 100 % minimum and 200 % maximum at a forward current of 10 mA. This bin guarantees the output transistor can sink at least 10 mA when the LED is driven with 10 mA."},{"question":"Can TCET1103 replace 4N35?","answer":"The TCET1103 and 4N35 are both single-channel transistor-output optocouplers in a 6-pin DIP (the TCET1103 uses a 4-pin DIP — pinout differs). The TCET1103 offers a higher isolation voltage (5000 Vrms vs 3550 Vrms typical for 4N35) and a tighter CTR range. They are not pin-compatible; a PCB layout change is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/TCET1103","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/TCET1103 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}}