Toshiba Launches Voltage Driven Photorelay in Industry’s Smallest Package with Reduced Input Power Dissipation

Helps to reduce equipment size and power consumption in test equipment applications

Sep 26, 2019 14:52 KST

TOKYO--(Business Wire / Korea Newswire) September 26, 2019 -- Toshiba Electronic Devices & Storage Corporation (“Toshiba”) has started to ship “TLP3407SR,” a new voltage driven photorelay that delivers lower power dissipation and the industry’s smallest[1] mounting area.

TLP3407SR has a maximum limited LED current of 1mA at voltage input, a reduction to about one third of that of the earlier “TLP3407SRH.” With this, the new photorelay cuts maximum input power dissipation to 3.3mW[2], supporting lower power consumption by equipment such as probe cards, automatic semiconductor test equipment (ATE), semiconductor testers, and the boards of associated application.

When the input is a high voltage of 5V or more, the new photorelay can be driven by adding an external resistor in series, which allows designs with a maximum trigger LED reference current of 0.2mA. This approach realizes lower input current design in tester circuits.

The TLP3407SR’s small S-VSON4T[3] package has a mounting area of 2.9mm2, about 27% smaller than the current VSONR4[4] package and the industry’s smallest[1]. It supports size reductions in equipment like probe cards, or mounting of more photorelays.


· Probe cards
· Automatic semiconductor test equipment (ATE)
· Logic and memory testers, etc.
· Measuring instruments (Oscilloscope, data logger, etc.)


· Low input power dissipation: 3.3mW (max) @3.3V, ILIM(LED)=1mA (max)
· Industry’s smallest[1] mounting area : 2.9mm2 (typ.)
· Two input voltages adopted for the control signal: DC3.3V (typ.) and DC5V (typ.)

Main Specifications (To view the table, please visit

[1] For photorelay products; Toshiba survey, as of September 24, 2019.
[2] @ the time with 3.3V input
[3] S-VSON4T: 2.0×1.45mm (typ.)
[4] VSONR4: 2.75×1.45mm (typ.)
[5] Current products

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

To check availability of the new product at online distributors, please visit:

*Company names, product names, and service names may be trademarks of their respective companies.

Customer Inquiries:
Optoelectronic Device Sales & Marketing Dept.

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.

About Toshiba Electronic Devices & Storage Corporation

Toshiba Electronic Devices & Storage Corporation combines the vigor of a new company with the wisdom of experience. Since becoming an independent company in July 2017, we have taken our place among the leading general devices companies, and offer our customers and business partners outstanding solutions in discrete semiconductors, system LSIs and HDD.

Our 22,000 employees around the world share a determination to maximize the value of our products, and emphasize close collaboration with customers to promote co-creation of value and new markets. We look forward to building on annual sales now surpassing 800-billion yen (US$7 billion) and to contributing to a better future for people everywhere.
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Toshiba Electronic Devices & Storage Corporation
Digital Marketing Department
Chiaki Nagasawa

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