Photo Dmos Relays : IOEC

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Product introduction

Photo Dmos relays are a type of IOEC relays which is Input/Output Element Control relays. The IOEC relays are a part of automation and control systems and are designed to handle the interaction between sensors, switches and other input devices as well as output devices such as motors and other actuating devices. Photo DMOS (Double Metal Oxide Semiconductor) relays also known as solid state relays are electronic devices that perform the same function as traditional electromagnetic relays but without the need for moving parts. These relays use a combination of optoelectronic and semiconductor technologies to achieve electrical isolation and switching capabilities.

Photo DMOS relays use an LED (Light Emitting Diode) to generate light when an input signal is applied. This LED is optically coupled to a photosensitive semiconductor material, ensuring electrical isolation between the input and output circuits. Photo DMOS relays offer a couple of advantages over traditional electromechanical relays including faster switching speeds and longer lifespan. These relays are versatile and can be adapted to many applications where fast, reliable and electrically isolated switching is required. Their solid state design and absence of moving parts contribute to their long lifespan and reduced maintenance needs, making them a preferred choice in many modern industries.

Model Package
Contact Load Voltage VL(V) Load Current IL(A) Load On Resistance Ron(Ω) Turn-On Time Ton(ms) Turn-Off Time Toff(ms) Operation LED Current
LED Forward Voltage
Off-State Leakage Current Ileak
PMB234 Download SOP 4pin 1B 60 0.5 AC/DC Max. 1.5 Max. 2.0 Max. 1.0 3.0 1.4 1
PMB210 Download SOP 4pin 1B 400 0.12 AC/DC Max. 50 Max. 1.0 Max. 3.0 3.0 1.4 1
PMA930 Download SMD 6 Pin 1A 700 A: (AC/DC) 0.6
B: (DC) 0.7
C: (DC) 0.8
AC/DC Max. 1.3 Max. 2.0 Max. 0.2 5.0 1.5 1
PMA926 Download SMD 6 Pin 1A 60 A: (AC/DC) 4.5
B: (DC) 5.0
C: (DC) 6.0
AC/DC Max. 0.05 Max. 2.5 Max. 0.1 5.0 1.5 1
PMA830 Download DIP 6pin 1A 700 A: (AC/DC) 0.6
B: (DC) 0.7
C: (DC) 0.8
AC/DC Max. 1.3 Max. 2.0 Max. 0.2 5.0 1.5 1
PMA815 Download DIP 6pin 1A 60 0.4 AC/DC Max. 1.4 Max. 0.8 Max. 0.5 5.0 1.4 1
PMA637 Download SMD 4pin 1A 60 3.0 AC/DC Max. 0.1 Max. 3.0 Max. 0.3 5.0 1.5 1
PMA437 Download DIP 4pin 1A 60 3.0 AC/DC Max. 1.2 3.0 0.3 5.0 1.5 1
PMA236 Download SOP 4pin 1A 100 0.4 AC/DC Max. 2.5 0.6 0.1 2.0 1.4 1.0
PMA233 Download SOP 4pin 1A 60 0.2 AC/DC Max. 5 0.5 0.5 2.0 1.4 1.0
  • Industrial Automation : Photo DMOS relays are widely used in industrial automation systems for controlling motors, heaters and other electrical devices. They offer fast switching speeds and high reliability, making them suitable for tasks like process control and machine control.
  • HVAC (Heating, Ventilation, and Air Conditioning) : These relays can control heating elements, fans, and other components in HVAC systems. They provide precise temperature and humidity control while being more durable than mechanical relays.
  • Medical Equipment : Photo DMOS relays are employed in medical devices such as MRI machines, X-ray equipment and diagnostic instruments where electrical isolation and reliability are critical.
  • Telecommunications : In the telecommunications industry, they are used for switching and routing signals, ensuring clear and reliable communication without signal interference.
  • Automotive : They find use in different automotive applications due to their solid state nature which makes them suitable for withstanding the harsh conditions of the automotive environment.
  • Security Systems : These relays are employed in security systems to control access points, alarms and surveillance equipment, ensuring reliable and secure operation.
  • Laboratory Equipment : In laboratories and test facilities, they are used for precise control and switching of signals in various testing and measurement applications.
  • Energy Management : Photo DMOS relays help in energy efficient lighting control, allowing for dimming and switching of lighting loads.
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