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Toshiba Launches Photorelays in Industry's Smallest Package

Toshiba Corporation (TOKYO:6502) today announced the launch of photorelays in the industry’s smallest[1] package. Shipment of mass production products starts from today.

Toshiba: VSON (Very Small Outline Non-leaded) Package Photorelays (Photo: Business Wire)

Toshiba: VSON (Very Small Outline Non-leaded) Package Photorelays (Photo: Business Wire)

The new products, “TLP3403” and “TLP3412”, utilize the industry’s smallest package for photocouplers, the Toshiba-developed VSON (Very Small Outline Non-leaded) package. Compared to equivalent Toshiba products in a USOP package, the new photorelays reduce the assembly area by 50% and volume by 60%. This can contribute to the development of smaller and thinner sets and also makes it possible to increase the number of photorelays on a circuit board to 1.3 times to 1.5 times that of conventional products.

Also, by using a new internal structure, a chip-on-chip structure[2], the new products, while retaining the same electrical characteristics as conventional USOP package products, secure improved high-frequency characteristics, which are necessary for signal transmission. The new photocouplers are suitable for various tester applications, especially for use in power-line switching and measuring-line switching.


Key Specifications of New Products

Part Number TLP3403 TLP3412
Package Dimension Area: 1.5 mm × 2.5 mm (max)

Height: 1.3 mm (max)

On-state Current 1 A (max) 0.4 A (max)
On-state Resistance 0.18 Ω (typ), 0.22 Ω (max) 1 Ω (typ), 1.5 Ω (max)
Off-state Voltage 20 V (min) 60 V (min)
Off-state Capacitance

(Photo side)

40 pF (typ) 20 pF (typ)
Trigger LED Current 3 mA (max)
Equivalent Rise Time

(Pass Characteristic)

40 ps (typ)
Isolation Voltage   300 Vrms(min)

[1] For photocoupler products, as of January 31, 2014. Toshiba survey.
[2] Chip-on-chip structure: A structure that mounts an LED chip on top of a detector chip, with insulation material in between.

Follow this link for more on Toshiba photocouplers and photorelays.

Customer Inquiries:
Optoelectronic Device Sales & Marketing Department
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.

About Toshiba

Toshiba is a world-leading diversified manufacturer, solutions provider and marketer of advanced electronic and electrical products and systems. Toshiba Group brings innovation and imagination to a wide range of businesses: digital products, including LCD TVs, notebook PCs, retail solutions and MFPs; electronic devices, including semiconductors, storage products and materials; industrial and social infrastructure systems, including power generation systems, smart community solutions, medical systems and escalators & elevators; and home appliances.

Toshiba was founded in 1875, and today operates a global network of more than 590 consolidated companies, with 206,000 employees worldwide and annual sales surpassing 5.8 trillion yen (US$61 billion). Visit Toshiba's web site at

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