Toshiba Launches New Family of Low Voltage Driven Photorelays --Photorelays in tiny packages enable high-density assembly in test equipment applications--

June 11, 2019

Toshiba Electronic Devices & Storage Corporation


TOKYO—Toshiba Electronic Devices & Storage Corporation (“Toshiba”), the industry leader in the miniaturization of cutting-edge photorelays, has introduced S-VSONR4, a new family of photorelays housed in the industry’s smallest[1] package, the S-VSON4T (2.0mm x 1.45mm). The new devices are suited for use in automatic test equipment, memory testers, SoC/LSI testers and probe cards. Shipments have already started.


Both the TLP34xxSRL series (two devices) and TLP34xxSRH series (three devices) have input voltage driven characteristics. TLP3406SRL and TLP3407SRL support a DC voltage range of 1.8V (typ.) to 3.3V (typ.), while TLP3406SRH, TLP3407SRH and TLP3412SRH support a DC voltage range of 3.3V (typ.) to 5V (typ.), characteristics that enhance compatibility with today’s low voltage FPGAs.


The new photorelays are housed in tiny S-VSON4T packages and require a mounting space of 2.9mm2, a footprint approximately 27% smaller than Toshiba’s previous generation package, the VSONR4 (2.75mm x 1.45mm). In addition, they all have a built-in input resistor, eliminating the need for an external input resistor, saving space. The tiny packaging and its space requirements will allow engineers to design smaller test boards, especially probe cards. It also allows increases in the number of photorelays on a board to achieve a higher density solution.


Despite their tiny package size, the new photorelays can drive large currents: up to 1.5A for the TLP3406SRx with an offstage voltage VOFF of 30V and an ON-state resistance Ron of 0.2Ω (max); and up to 1A for TLP3407SRx with a VOFF of 60V and Ron of 0.3Ω. TLP3412SRH can drive up to 0.4A (VOFF = 60V / Ron = 1.5Ω). This makes them highly suited to device power supply applications across a range of test equipment. All of the new devices have a guaranteed operating temperature range to 110 ℃(max).


  • The smallest package of any voltage input control photorelay: mount space 2.9mm2 (typ.) (as of June 4, 2019)
  • Two input voltages adopted for the control signal: DC 1.8V (typ.) and DC 3.3V (typ.)
  • VOFF supports 30V/60V, ION supports 0.4A to 1.5A.


  • Automatic test equipment (ATE), memory testers, SoC and LSI testers and probe cards

Main Specifications


Part number
DC system voltage VCC typ. (V) ** 3.3/5 1.8 3.3/5 1.8 3.3/5
Package S-VSON4T *


OFF-state output terminal voltage VOFF (V) 30 30 60 60 60
ON-state current ION (A) 1.5 1.5 1.0 1.0 0.4
ON-state current (pulsed) IONP (A) 4.5 4.5 3.0 3.0 1.2


Operating voltage VFON max (V) 3 1.6 * 3 1.6 3
ON-state resistance RON max (Ω) 0.2 0.2 0.3 0.3 1.5
Output capacitance COFF typ. (pF) 120 120 * 80 * 80 max 20   *

OFF-state current IOFF max (nA)













Turn-on time tON max (ms) 2 2 2 1 * 0.5
Turn-off time tOFF max (ms) 0.2  * 0.2  * 0.2  * 0.2  * 0.2  *


Isolation voltage BVS min (Vrms) 500 500 500 500 500
Stock Check & Purchase


[1] Mount space 2.9mm2. For photorelay products; Toshiba survey, as of June 4, 2019.

* Revised on June 17, 2019.

** Input Control Voltage

Follow the link below for more on Toshiba’s photorelay lineup.

To check availability of the new products 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.
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.