Toshiba Electronic Devices & Storage Corporation Electronic Parts
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The Toshiba TLP291 is a single-channel transistor-output photocoupler (optocoupler) that optically couples an infrared emitting diode to a silicon photo-transistor. Built in a compact 4-pin SO4 surface-mount package, it delivers a high 3750 Vrms isolation rating while supporting high-density board layouts, making it a popular general-purpose isolation device for switching power supplies, programmable controllers, and signal-level interfacing. The orderable base device is the Toshiba TLP291; CTR-binned variants are specified by appending a rank code (for example TLP291(GB,E for rank GB), and a VDE-approved version is designated with Option (V4) per the EN 60747-5-5 standard.
The TLP291 can be difficult to obtain through authorized channels in the quantities and lead times engineering teams need. Pacific Component Xchange is an independent distributor specializing in hard-to-find and allocated power-management ICs and optocouplers. We help buyers secure the Toshiba TLP291 and its VDE-approved (Option V4) variants even when authorized-distributor availability is limited or obsolete. Every order is backed by our authenticity and quality-assurance process, with global shipping to keep your production line running. Request a quote (RFQ) today and our sourcing specialists will respond with availability, pricing, date codes, and lead time for your required quantity.
The TLP291 is a single-channel transistor-output photocoupler (optocoupler) from Toshiba. It optically couples an infrared LED to a silicon photo-transistor and provides 3750 Vrms isolation in a compact 4-pin SO4 surface-mount package.
The (V4) option designates the VDE-approved variant that is safety-certified to the EN 60747-5-5 standard for optoelectronic isolation devices. To order a VDE-approved part, specify Option (V4) with the part number.
The TLP291 is rated for a minimum isolation voltage of 3750 Vrms, making it suitable for primary-to-secondary isolation in power supplies and industrial controllers.
The TLP291 is supplied in a compact 4-pin SO4 surface-mount package designed for high-density board layouts.
Yes. Pacific Component Xchange is an independent distributor specializing in hard-to-find optocouplers. We can source the Toshiba TLP291 and its VDE-approved (Option V4) variants even when authorized-channel availability is limited. Submit an RFQ for current availability, pricing, and lead time.
The TLP291 has a minimum Current Transfer Ratio of 50% (un-ranked, IF = 5 mA, VCE = 5 V). The popular GB rank specifies a minimum CTR of 100%. Other rank bins (Y, GR, GRH, BLL, etc.) offer different CTR ranges; contact us to confirm the rank that matches your design.
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