TLP291-4(GB-TP,E)

TLP291-4(GB-TP,E) is a four-channel Toshiba transistor-output photocoupler in the SO16 package, filed under the marketplace string exactly as listed: every element of the string is decoded in the maker’s datasheet ordering section — the TLP291-4 type, the GB current-transfer-ratio rank, the TP tape type (2,000 pieces per reel) and the E [[G]]/RoHS-compatible element. A notation note, stated rather than silently corrected: Toshiba’s own example strings in that table omit the closing parenthesis, so the closing bracket in this code is the marketplace’s closing style; the code is filed as listed so an inquiry matches the buyer’s string character for character. Verified figures for the GB rank: a current transfer ratio of 100 % to 400 % at 5 mA input current and 5 V collector-emitter voltage, input forward voltage of 1.1 V minimum, 1.20 V typical and 1.4 V maximum at 10 mA, collector-emitter breakdown of 80 V minimum, isolation voltage of 2500 Vrms minimum, collector-emitter saturation voltage of 0.4 V maximum, maximum forward current and collector current of 50 mA each, and an operating range of −55 °C to +110 °C. The selection point is four matched isolation channels in one body for multi-loop feedback and signal isolation. Selection advice: the rank is the specification — the unranked form spans 50 % to 400 %, and other ranks are separate order codes; approve any substitution against the GB band before it reaches a feedback loop. Parameters verified against the Toshiba TLP291-4 datasheet (2020-02).