Toshiba Electronic Devices & Storage Corporation Electronic Parts
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The Toshiba TLP291(GB-TP,SE(T) is a single-channel transistor-output photocoupler that couples a GaAs infrared emitting diode (IRED) to a silicon phototransistor across an isolation barrier. It is housed in Toshiba’s very small, thin SO4 (SOP4) surface-mount package, making it well suited to high-density board layouts. This particular ordering code denotes the GB current-transfer-ratio (CTR) rank, supplied taped and reeled (TP / T carrier-tape reel) under the SE packing designation.
The TLP291 is marked Not Recommended for New Design (NRND) by Toshiba, and authorized-distributor stock of the specific GB-rank, taped-and-reeled TLP291(GB-TP,SE(T) ordering code is scarce. Pacific Component Xchange specializes in hard-to-find and end-of-life power-management ICs and optocouplers, helping engineers and buyers keep existing designs and production lines running without costly redesigns.
Every order is backed by our authenticity and quality assurance process to protect you against counterfeit and substandard parts, and we ship globally to support production schedules worldwide. Request a quote (RFQ) today and our sourcing team will confirm availability, lead time, date codes, and pricing for the quantity you need.
The orderable Toshiba code is TLP291(GB-TP,SE(T). 'GB' is the current-transfer-ratio (CTR) rank, while the TP/SE/T suffixes indicate the taped-and-reeled (embossed carrier tape) packing format. Source listings sometimes show garbled trailing fragments; the verified code is TLP291(GB-TP,SE(T).
The GB rank specifies a current transfer ratio (CTR) of 100% (minimum) to 400% (maximum), measured at IF = 5 mA and VCE = 5 V. Toshiba bins the TLP291 into several CTR ranks (e.g., Y, GR, GB, GRL, GRH, BLL); GB offers a wide, mid-high CTR window.
The TLP291 provides a guaranteed isolation voltage (BVS) of 3750 Vrms minimum (AC, 60 s), making it suitable for high-density surface-mount isolation in power supplies and controllers.
Toshiba lists the TLP291 as Not Recommended for New Design (NRND). It remains usable for existing designs and repairs, but authorized stock is limited. Pacific Component Xchange specializes in sourcing this hard-to-find part.
It is supplied in Toshiba's SO4 (SOP4) surface-mount package, a very small, thin 4-pin coupler weighing approximately 0.05 g, suited to high-density PCB assembly.
Submit a Request for Quote (RFQ) to Pacific Component Xchange. Our team will confirm current availability, date codes, lead time, and pricing for your required quantity, with authenticity assurance and global shipping.
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