TOSHIBA TLP291(GB-TP,E

Mfr. Part

TLP291(GB-TP,E

Manufacturer

Toshiba Electronic Devices & Storage Corporation (TAEC product line). Y-IC is a quality distributor for Toshiba. We source reliably, ship fast, and stand behind the brand with the best products and services for your projects.

Detailed Description

Compact single-channel optocoupler with a GaAlAs infrared LED input and an NPN phototransistor output. It provides safe, low-cost galvanic isolation between low-voltage logic and high-voltage or noisy circuits. The GB suffix indicates a controlled current transfer ratio (CTR) bin. The TP,E suffix indicates tape-and-reel, lead-free, RoHS-compliant packaging. Commonly known in catalogs as an SO-4/Mini-Flat phototransistor optocoupler. While some databases place it under Integrated Circuits Specialized ICs, functionally it is an optoisolator designed for signal-level isolation.

Key Features

Single-channel phototransistor optocoupler for signal isolation

SO-4 mini-flat SMD package for tight PCB spaces

Factory-binned CTR group GB for tighter transfer consistency

High isolation rating typically 3750 Vrms (see datasheet)

Low LED drive current for low-power designs

RoHS compliant, Pb-free eco package (E)

Supplied in tape-and-reel for automated assembly (TP)

UL and other safety approvals available on the family (verify on datasheet/label)

Key Advantages

Simple and robust galvanic isolation without complex ICs

Small footprint saves board area versus DIP optocouplers

Stable CTR bin helps maintain predictable gain across units

Low input current reduces power and heat in dense designs

Broad ecosystem and long industry track record for ease of sourcing and second-sourcing

Backed by Toshiba quality and Y-IC supply assurance

Packaging

Package type SO-4 (Mini-Flat, also called MFSOP-4). Supplier case code 719 per listing

Mounting SMD, gullwing terminations, tape-and-reel orientation per Toshiba TP spec

Tape format embossed tape, typical 8 mm tape width with 4 mm pitch (check packing spec)

Material epoxy mold compound, UL94 V-0 flame rating; copper leadframe with matte Sn finish (Pb-free)

Approx dimensions body about 4.4 mm L x 2.6 mm W x 2.1 mm H (refer to datasheet drawing for exact)

Pinout 1 Anode, 2 Cathode, 3 Emitter, 4 Collector

Isolation distance creepage/clearance consistent with SO-4 mini-flat class (see mechanical drawing)

Thermal characteristics junction-to-ambient thermal resistance typically in the 200–300 °C/W range depending on PCB copper and airflow (see datasheet for test conditions)

Electrical properties highlights

- Isolation voltage typically 3750 Vrms for 1 minute

- Output transistor VCEO commonly up to 80 V class; collector current capability suitable for signal-level loads

- CTR defined by bin GB at IF test current (usually 5 mA, VCE 5 V). Exact GB CTR window is per datasheet bin table

- LED forward voltage typically around 1.2 V at 5 mA; max forward current and power dissipation per datasheet

- Switching times in the tens of microseconds typical for phototransistor optocouplers

Date/DC current lot 1307+ (2013 week 07 and later in the lot, per label)

Quantity on hand listing 3800 units (subject to change; contact us for real-time availability)

Lifecycle

Status Active per latest public information at time of writing. No end-of-life notice observed. Not flagged as NRND

Form-fit-function alternatives and equivalents to consider. Always verify pinout, CTR bin, isolation rating, approvals, and timing

- Toshiba TLP291 other CTR bins or packaging options (same family)

- Toshiba TLP181 series SO-4 phototransistor optocouplers with similar CTR options

- Vishay VOMA617A series SO-4 phototransistor optocouplers (CTR bins A/B/C)

- Everlight EL3H7/EL3H4 SO-4 phototransistor optocouplers

- Lite-On LTV-356T SO-4 phototransistor optocoupler

- onsemi FODM217 series SO-4 phototransistor optocouplers

- Renesas (NEC-CEL) PS2801/PS2811 family SO-4 phototransistor optocouplers

If you need a true drop-in with the same CTR bin and certifications, or if your safety agency file requires an exact match, contact Y-IC sales on our website. We will verify the best equivalent and provide samples and cross-reference support

Key Application Areas

MCU and PLC input/output isolation

SMPS feedback and primary-secondary signal transfer

Industrial control, sensors, and metering isolation

Communication interfaces in noisy environments (RS-232/RS-485 side isolation with proper biasing)

Home appliances, HVAC, and white goods control boards

Office automation equipment and instrumentation

General-purpose signal isolation where cost, size, and reliability matter

Datasheet

Y-IC hosts the most authoritative and up-to-date datasheet for this exact model on our product page. We recommend downloading it now to confirm pinout, CTR bin GB limits, isolation ratings, dimensions, and agency approvals directly from the source.

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