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

September 25, 2019

Toshiba Electronic Devices & Storage Corporation

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


TOKYO—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


Part number






Package S-VSON4T  




OFF-state output terminal voltage  VOFF  (V) 60 30 30 60 60 60
ON-state current  ION  (A) 1 1.5 1.5 1 1 0.4

ON-state current (pulsed)


3 4.5 4.5 3 3 1.2
Recommended operating conditions

Applied input forward voltage

VIN (typ.)  (V)

3.3 3.3 1.8 3.3 1.8 3.3



Limited LED current

ILIM(LED) max  (mA)



Trigger LED current

IFT max  (mA)

0.2 -

Operating voltage

VFON max  (V)

3 3 1.6 3 1.6 3

ON-state resistance

RON max  (Ω)

0.3 0.2 0.2 0.3 0.3 1.5

Output capacitance

COFF typ.  (pF)

80 120 120 80 80 max 20

OFF-state current

IOFF max  (nA)
















Turn-on time  tON max  (ms) 20 2 2 2 1 0.5
Turn-off time  tOFF max  (ms) 1 0.2 0.2 0.2 0.2 0.2



Isolation voltage

BVS min  (Vrms)

500 500 500 500 500 500
Stock Check & Purchase


[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 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.