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Toshiba Electronic Devices & Storage Corporation Adds New Line-up of High Speed Signal Transmission Photorelays with Industry’s Smallest Footprint

September 22, 2017

Toshiba Electronic Devices & Storage Corporation


TOKYO— Toshiba Electronic Devices & Storage Corporation (TDSC) today announced the  launch of two high speed signal transmission photorelays, “TLP3475S” and “TLP3440S,” that realize the industry’s smallest footprint[1]. Shipments start today.

The TLP3475S is housed in an S-VSON4 package and features low on-state output resistance. The TLP3440S is housed in a new S-VSON4T package, which has the same industry-leading small footprint as the S-VSON4 but is thinner. The TLP3440S features low off-state output resistance.

The footprint of the new photorelays is 22.5% smaller than that of existing VSON4 packages[2]. Used in combination, they will help to reduce the sizes of circuit boards for tester PEs[3]. They can be also be used in gigahertz high speed signal transmission lines. Unlike typical photorelays, which have a maximum operating temperature of 85°C, the TLP3440S and TLP3475S can operate at up to 110°C, and therefore simplify system design.

The latest Gartner market report recognizes Toshiba as the leading manufacturer of optocouplers by sales in 2015 and 2016, with 23% of sale-based market share in CY2016. (Source: Gartner, Inc. “Market Share: Semiconductor Devices and Applications Worldwide 2016” 30 March, 2017)

TDSC will continue to deliver products that meet the needs of customers by promoting the development of a diverse portfolio of photocouplers and photorelays tailored to market trends.


  • Semiconductor testers (Memory, SoC, LSI)
  • Probe cards
  • Replacement of mechanical relays


  • Industry’s smallest mounting area[1]
      S-VSON4 package: 2.00x1.45x1.65 mm (typ.)
      S-VSON4T package: 2.00x1.45x1.3 mm (typ.)
  • Voltage and current ratings:
      OFF-state output terminal voltage 40 V, ON-state current 0.12 A,
      ON-state current (pulsed) 0.36 A (TLP3440S)
      OFF-state output terminal voltage 60 V, ON-state current 0.4 A,
      ON-state current (pulsed) 1.2 A (TLP3475S)
  • High operating temperature rating: Topr (max)=110℃

Main Specifications


Part number Absolute maximum ratings ON-state resistance Output capacitance
OFF-state current Turn-on time
Turn-off time
OFF-state output terminal voltage
ON-state current
Operating temperature
TLP3440S 40 0.12 -40 to 110 12 14 0.45 1 40 0.2 0.3
TLP3475S 60 0.4 1.1 1.5 12 1 50 0.5 0.4


[1] As of September 22, 2017, TDSC survey.

[2] VSON4 package: 2.45x1.45x1.3 mm (typ.)

[3] Pin Electronics (PE): Switches for inspection signals to DUT of various testers.

Follow the link below for more on the new products and Toshiba’s photorelay line-up.

Customer Inquiries:

Optoelectronic Device Sales & Marketing Dept.

Tel: +81-3-3457-3431

Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.